CN103051955B - Flow media playing method and device - Google Patents

Abstract

The invention provides a streaming media playing method and device. The method includes detecting the download rate of the streaming media; adjusting the size of the buffer area of the streaming media data according to the download rate and the playback rate of the streaming media, wherein the buffer area of the streaming media data is used to process the streaming media data Data storage space for cache operations. The technical scheme of the invention can dynamically adjust the size of the streaming media data buffer area based on the streaming media download rate during streaming media playback, and can effectively improve the fluency of streaming media playback.

Description

Streaming media playback method and device

technical field

The embodiments of the present invention relate to streaming media playing technologies, and in particular, to a streaming media playing method and device.

Background technique

Streaming Media (Streaming Media) playback technology refers to the technology of multimedia online real-time playback by using streaming technology for multimedia file transmission. When playing multimedia files such as video/audio, the server transmits multimedia files by using streaming media playback technology, which can enable the client on the user's computer to realize online real-time playback of multimedia files while downloading and playing, which can effectively improve users' online viewing. The experience of multimedia content.

Among them, streaming technology means that the server compresses multimedia files into individual compressed packages, and transmits the compressed packages to the user computer continuously and in real time. Such transmitted multimedia files can also be called streaming media, and the transmitted compressed packages can also be called streaming media. It can be called streaming data; the client on the user's computer can receive streaming data in real time, and decode and play the streaming data in real time, so as to realize streaming media playback while downloading. At present, when the client on the user's computer receives streaming data, it usually sets a fixed-size data storage block as a buffer for caching the streaming data. In this way, network jitter and delay changes can be improved by caching the streaming data. The impact on streaming media playback, avoiding the pause of streaming media playback caused by network congestion.

However, in the existing streaming media playback technology, the size of the buffer area used for streaming data buffering operations is fixed, which brings the following problems: due to the initial playback of streaming media, or when playback is restarted due to a pause during playback, buffering is required. The streaming data in the area can only be played when it is full. Therefore, the unreasonable setting of the buffer size often causes the streaming media to play poorly in the existing streaming media playback process. For example, if the buffer size is set too large, it will cause streaming The waiting time for initial media playback and the pause time during playback are too long; if the buffer setting is too small, it will cause too many pauses during streaming media playback, which will affect the playback effect.

Contents of the invention

The embodiments of the present invention provide a method and device for playing streaming media, which can overcome the problem of poor playback effect caused by the unreasonable size of the fixed buffer area in the existing streaming media playing process, and can effectively improve the fluency of streaming media playing.

In a first aspect, an embodiment of the present invention provides a method for playing streaming media, including:

Detect the download rate of streaming media;

According to the download rate and the playback rate of the streaming media, the size of the streaming media data buffer area is adjusted, wherein the streaming media data buffer area is a data storage space for caching the streaming media data.

With reference to the first aspect, in a first possible implementation manner, the adjusting the size of the streaming media data buffer area according to the download rate and the streaming media playback rate specifically includes:

During the initial playback of the streaming media or restarting playback after a pause, when the download rate is greater than or equal to the playback rate, the size of the buffer area of the streaming media data is adjusted to the first buffer length, so that the preset Start playing streaming media after the buffer area of the streaming media data with the minimum buffer length is full, the first buffer length is the maximum value between the length of the buffer area occupied by the buffered data in the current buffer area and the preset minimum buffer length .

With reference to the first possible implementation of the first aspect, in the second possible implementation, the streaming media playback method further includes:

During the initial playback of the streaming media or restarting playback after a pause, when the download rate is lower than the playback rate, obtain the cache change rate in the current buffer area according to the download rate and the playback rate, and adjust according to the cache change rate The size of the buffer area of the streaming media data;

Wherein, the cache change rate S(t)=D(t)-K(t), wherein, D(t) is the download rate of streaming media, K(t) the playback rate of streaming media, and the cache change rate It is used to indicate the change amount of data increase or decrease in the cache area.

With reference to the second possible implementation manner of the first aspect, in the third possible implementation manner, the adjusting the size of the buffer area of the streaming media data according to the buffer change rate in the current buffer area specifically includes:

When the buffer change rate of the current buffer area increases, the buffer area occupied by the buffered data in the current buffer area is used as the buffer area of the streaming media data, so as to start playing the streaming media.

In combination with the second possible implementation manner of the first aspect, in a fourth possible implementation manner, the adjusting the size of the buffer area of the streaming media data according to the buffer change rate in the current buffer area specifically includes:

When the change rate of the current buffer area does not change or decreases, and the growth rate of the download rate reaches a preset growth threshold, the buffer area occupied by the cached data in the current buffer area is used as the buffer area of the streaming media data, so that Start streaming.

In combination with the second possible implementation manner of the first aspect, in a fifth possible implementation manner, the adjusting the size of the buffer area of the streaming media data according to the buffer change rate in the current buffer area specifically includes:

When the change rate of the current buffer area does not change or decreases, and the growth rate of the download rate does not reach the preset growth threshold or declines, adjust the cache of the streaming media data according to the size of the cached data in the current buffer area The size of the zone.

With reference to the fifth possible implementation of the first aspect, in the sixth possible implementation, the adjusting the size of the streaming media data buffer according to the size of the cached data in the current buffer specifically includes:

The buffered data B in the current buffer area satisfies the condition: when B>=G*(1-D/K), the buffer area occupied by the buffered data in the current buffer area is used as the buffer area of the streaming media data, so that start streaming;

Wherein, G is the length of the unplayed streaming media, D is the download rate, and K is the playback rate.

In combination with the sixth possible implementation of the first aspect, in a seventh possible implementation, the streaming media playback method further includes:

The data B cached in the current buffer area does not satisfy the condition: B>=G*(1-D/K), and when G*(1-D/K) is not greater than the maximum value of the buffer area of streaming media data, the described The length of G*(1-D/K) is used as the size of the buffer area of the streaming media data, so as to start playing the streaming media after the buffer area of the streaming media data is full.

With reference to the first aspect, in an eighth possible implementation manner, the streaming media playback method further includes:

When restarting playback after the streaming media is paused, if the number of pauses is greater than a preset pause threshold, increase the size of the buffer area of the streaming media data.

Combining the first aspect or the first or two or three or four or five or six or seven or eight possible implementations of the first aspect, in the ninth possible implementation, the detection obtains the download rate of the streaming media, specifically include:

The download rate of the streaming media is obtained by detecting the preset time after starting the streaming media playback command, or restarting the playback after a pause;

Or, after starting the streaming media playback command, or restarting the playback after a pause, the download rate of the streaming media is obtained through periodic detection.

In combination with the first aspect or the first or second or third or four or five or six or seven or eight or nine possible implementations of the first aspect, in the tenth possible implementation, the streaming media playback method further includes :

Receive the streaming media playing instruction, and set the streaming media data storage space with a preset size for the streaming media playing as a buffer area for playing the streaming media initial streaming data.

In combination with the first or second or third or four or five or six or seven or eight or nine or ten possible implementations of the first aspect, in the eleventh possible implementation, the streaming media playback method further includes:

During the initial playback of the streaming media or restarting the playback process after a pause, if the playback waiting time exceeds the preset waiting time, the buffer area occupied by the cached data in the current buffer area is used as the buffer area of the streaming media data, so as to start playing the stream media.

In combination with the first aspect, in the twelfth implementation manner, the adjustment of the buffer size of the streaming media data according to the download rate and the playback rate of the streaming media specifically includes:

During the streaming media playing process, the buffer change rate in the current buffer area is obtained according to the download rate and the playback rate, and when the buffer change rate increases, the size of the streaming media data buffer area is increased.

In a second aspect, an embodiment of the present invention provides a streaming media playback device, including:

A detection module is used to detect the download rate of streaming media;

An adjustment module, configured to adjust the size of the buffer area of the streaming media data according to the download rate and the playback rate of the streaming media, wherein the buffer area of the streaming media data is a data storage space for caching the streaming media data .

With reference to the second aspect, in the first possible implementation manner, the adjustment module is specifically configured to, when the download rate is greater than or equal to the playback rate during the initial playback of the streaming media or restart playback after a pause, Adjust the size of the buffer area of the streaming media data to the first buffer length, so as to start playing the streaming media after the buffer area of the streaming media data of the preset minimum buffer length is full, and the first buffer length is the current The maximum value between the length of the cache area occupied by the cached data in the cache area and the preset minimum cache length.

With reference to the first possible implementation manner of the second aspect, in the second possible implementation manner, the adjustment module is further configured to: during the initial playback of the streaming media or restarting playback after a pause, the download rate is less than the playback rate. When the speed is high, obtain the buffer change rate in the current buffer area according to the download rate and the playback rate, and adjust the size of the buffer area of the streaming media data according to the buffer change rate;

Wherein, the cache change rate S(t)=D(t)-K(t), wherein, D(t) is the download rate of streaming media, K(t) the playback rate of streaming media, and the cache change rate It is used to indicate the change amount of data increase or decrease in the cache area.

With reference to the second possible implementation of the second aspect, in the third possible implementation, the adjustment module is specifically configured to, when the cache change rate of the current buffer increases, increase the The buffer area serves as a buffer area for streaming media data in order to start playing streaming media.

With reference to the second possible implementation manner of the second aspect, in the fourth possible implementation manner, the adjustment module is specifically configured to have no change or decrease in the change rate of the current cache area, and the growth rate of the download rate reaches When the growth threshold is preset, the buffer area occupied by the buffered data in the current buffer area is used as the buffer area of the streaming media data, so as to start playing the streaming media.

With reference to the second possible implementation manner of the second aspect, in a fifth possible implementation manner, the adjustment module is specifically configured to: the change rate of the current buffer area does not change or decrease, and the growth rate of the download rate does not change. When the preset growth threshold is reached or decreased, the size of the streaming media data buffer area is adjusted according to the size of the buffered data in the current buffer area.

In combination with the fifth possible implementation of the second aspect, in the sixth possible implementation, the adjustment module is specifically configured to satisfy the condition that the cached data B in the current buffer area: B>=G*(1- During D/K), the cache area occupied by cached data in the current buffer area is used as the buffer area of streaming media data, so as to start playing streaming media;

Wherein, G is the length of the unplayed streaming media, D is the download rate, and K is the playback rate.

In combination with the sixth possible implementation of the second aspect, in the seventh possible implementation, the adjustment module is also used for the data B cached in the current buffer area not to satisfy the condition: B>=G*(1-D/ K), and when G*(1-D/K) is not greater than the maximum value of the buffer area of the streaming media data, the length of the G*(1-D/K) is used as the size of the buffer area of the streaming media data, In order to start playing the streaming media after the buffer area of the streaming media data is full.

In combination with the second aspect, in an eighth possible implementation manner, the adjustment module is further configured to increase the cache of streaming media data if the number of pauses is greater than a preset pause threshold when restarting playback after the streaming media pauses The size of the zone.

In combination with the second aspect or the first or two or three or four or five or six or seven or eight possible implementations of the second aspect, in a ninth possible implementation, the detection module is specifically configured to Media play command, or restart after a pause, and detect the download rate of the streaming media at the preset time after the start of playback; or, use it to start the streaming media playback command, or restart the playback after a pause, and periodically detect the download rate of the streaming media download rate.

In combination with the second aspect or the first or two or three or four or five or six or seven or eight or nine possible implementations of the second aspect, in the tenth possible implementation, the streaming media player further includes :

The play command receiving module is used to receive the stream media play command, and set the stream media data storage space with a preset size for the stream media play as a buffer area for playing the initial stream media data of the stream media.

In combination with the first or two or three or four or five or six or seven or eight or nine or ten possible implementation manners of the second aspect, in an eleventh possible implementation manner, the adjustment module is further configured to During the initial playback of the streaming media or restarting the playback after a pause, if the playback waiting time exceeds the preset waiting time, the buffer area occupied by the buffered data in the current buffer area is used as the buffer area of the streaming media data, so as to start playing the streaming media.

With reference to the second aspect, in the twelfth possible implementation manner, the adjustment module is further configured to obtain the buffer change rate in the current buffer area according to the download rate and playback rate during streaming media playback, and When the buffer change rate increases, increase the size of the streaming media data buffer area.

In summary, this embodiment can dynamically adjust the size of the buffer area of the streaming media data based on the download rate and playback rate of the streaming media, and adjust the buffer area of the streaming media data according to the current streaming media playback situation during the streaming media playback process. to an appropriate size, thereby avoiding the problem of poor fluency of streaming media playback caused by only using a fixed buffer size in existing streaming media playback.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic flow diagram of a streaming media playback method provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic flow diagram of a streaming media playing method provided in Embodiment 2 of the present invention;

FIG. 3 is a schematic flowchart of a streaming media playback method provided in Embodiment 3 of the present invention;

FIG. 4 is a schematic flowchart of a streaming media playing method provided in Embodiment 4 of the present invention;

FIG. 5 is a schematic structural diagram of a streaming media playback device provided in Embodiment 5 of the present invention;

FIG. 6 is a schematic structural diagram of a streaming media playback device provided in Embodiment 6 of the present invention;

FIG. 7 is a schematic structural diagram of a streaming media playback device provided by Embodiment 7 of the present invention.

detailed description

The streaming media playback method and device provided by the embodiments of the present invention can adjust the size of the buffer area of the streaming media data in real time based on the download rate and playback rate of the streaming media, thereby ensuring the smoothness of the streaming media playback and improving the user's ability to watch the streaming media. Media experience.

FIG. 1 is a schematic flowchart of a streaming media playing method provided by Embodiment 1 of the present invention. This embodiment is applied to streaming media playback. Specifically, after receiving a streaming media playback instruction, a client playing streaming media can receive streaming media data, and can adjust the data used for streaming according to the download rate and playback rate of the streaming media. The size of the cache area of cache streaming media data improves the fluency of streaming media playback, specifically, as shown in Figure 1, the method of this embodiment may include the following steps:

Step 101, detecting the download rate of streaming media;

Step 102: Adjust the size of the streaming media data buffer area according to the download rate and the streaming media playback rate, wherein the streaming media data buffer area is a data storage space for caching the streaming media data.

In this embodiment, when the client needs to play streaming media, it can receive streaming data while playing streaming media, and in the process of playing streaming media, it can adjust the buffer area of streaming media data based on the download rate of streaming media The size of the streaming media data buffer area can be dynamically adjusted, which can avoid the unreasonable size setting of the buffer area when the existing single buffer area size is used, resulting in a long waiting time for the initial playback of the streaming media, or after the playback pauses. Playing problems such as too long waiting time or frequent pauses due to too small cache settings can effectively improve the fluency of streaming media playback and improve the user experience of watching streaming media.

Those skilled in the art can understand that the playback rate of the streaming media can be carried when the streaming media playback instruction is issued, or can be obtained by analyzing the first piece of streaming media data received. The above-mentioned detection obtains the download rate of the streaming media. Specifically, after receiving the streaming media playback instruction, the periodic detection is performed, and each time the download rate of the streaming media is detected, the buffer area of the streaming media data is adjusted based on the download rate. or the download rate of the streaming media obtained from the above detection, can also be detected at each playback stage, such as initial playback, restarting playback after a pause, or continuous playback for a certain period of time, according to the preset time, and when the streaming media is detected. After the download rate is set, the size of the streaming media data buffer area is adjusted based on the streaming media download rate.

To sum up, the streaming media playback method provided by this embodiment can dynamically adjust the size of the buffer area of streaming media data based on the download rate and playback rate of the streaming media, and can set the The buffer area of streaming media data is adjusted to an appropriate size, so that the problem of poor fluency of streaming media playback caused by only using a fixed buffer size in existing streaming media playback can be avoided.

FIG. 2 is a schematic flowchart of a streaming media playing method provided in Embodiment 2 of the present invention. This embodiment can dynamically adjust the size of the buffer area of the streaming media data based on the download rate and playback rate of the streaming media during the initial playback of the streaming media after receiving the streaming media playback instruction, so as to avoid too long waiting time for the initial playback of the streaming media Specifically, after the client receives the streaming media playback instruction, it can adjust the size of the buffer area of the streaming media data based on the method of this embodiment, and start playing the streaming media after the buffer area is full, as shown in Figure 2, The method of this embodiment may include the following steps:

Step 201, receiving a streaming media playback instruction;

Step 202, detecting the download rate of the current streaming media;

Step 203, judging whether the download rate of streaming media is greater than or equal to the playback rate of streaming media, if so, execute step 204, otherwise, execute step 207;

Step 204, judging whether the size of the buffer area occupied by the cached data in the current buffer area is greater than the preset minimum buffer length, if so, execute step 205, otherwise, execute step 206;

Step 205, using the size of the buffer area occupied by the cached data in the current buffer area as the buffer area of the streaming media data, and performing step 216;

Step 206, adjusting the size of the buffer area of the streaming media data to a preset minimum buffer length, so that after the buffer area of the streaming media data with the preset minimum buffer length is full, perform step 216;

Step 207, judging whether the buffer change rate of the current buffer area increases, if yes, execute step 208, otherwise, execute step 209;

Step 208, using the buffer area occupied by the buffered data in the current buffer area as the buffer area of the streaming media data, and performing step 216;

Step 209, judging whether the growth rate of the download rate of the streaming media reaches the preset growth threshold, if yes, execute step 210, otherwise execute step 211;

Step 210, using the buffer area occupied by the buffered data in the current buffer area as the buffer area of the streaming media data, and performing step 216;

Step 211, judging whether the cached data B in the current buffer area satisfies the condition: B>=G*(1-D/K), if yes, execute step 212, otherwise execute step 213;

Step 212, using the buffer area occupied by the buffered data in the current buffer area as the buffer area of the streaming media data, and performing step 216;

Step 213, judge whether G*(1-D/K) is greater than the maximum value of the buffer zone of streaming media data, if yes then perform step 214, otherwise, perform step 215;

Step 214, use the length of G*(1-D/K) as the size of the buffer area of the streaming media data, so that after the buffer area of the streaming media data is full, execute step 216;

Step 215, using the maximum value of the buffer area of the streaming media data as the buffer area of the streaming media data, so that after the buffer area of the streaming media data is full, step 216 is performed;

Step 216, start playing streaming media.

In the above step 201, when the streaming media is initially played, the streaming media playback instruction will be received, and the streaming media data will be received based on the streaming media playback instruction, and the preset can be set for the streaming media playback after receiving the streaming media playback instruction The size of the streaming media data storage space is used as the buffer area of the initial streaming media data for streaming media playback. Wherein, the size of the initial streaming media data buffer area may be set by the client according to current network conditions, or set by default by the client.

In this embodiment, in the above-mentioned step 202, the download rate of the streaming media is obtained through streaming media detection, which may be the preset time after the streaming media play instruction, for example, after 1 second, the download rate of the streaming media is detected to obtain the current streaming media download rate, and adjust the size of the buffer area of the streaming media data based on the download rate, or, after receiving the streaming media playback instruction, periodically detect the download rate to periodically adjust the size of the buffer area of the streaming media data size.

In the above steps 203-205, when the download rate of streaming media is greater than the playback rate, it means that the current network resources are sufficient for streaming media to play smoothly. At this time, the size of the buffer area of streaming media data can be adjusted to a minimum value to reduce streaming For the waiting time when the media is initially played, the minimum value is the first buffer length, which is the maximum value between the length of the buffer area occupied by the buffered data in the current buffer area and the preset minimum length. Wherein, the preset minimum length can be a protection value set in order to avoid the pause of the streaming media playback caused by the rapid exhaustion of the buffer data. This protection value can avoid the fluctuation of the network bandwidth and cause the streaming media playback length, which can be set In order to meet the size of the streaming media playable buffer area of 0.5s-2s, that is, the data cached in the buffer area of the minimum buffer length can ensure that the streaming media can be played for 0.5s-2s, and the minimum buffer length can be set by the client by default , or it can also be set according to the current network conditions.

In the above steps 207 and 208, when the download rate of the streaming media is lower than the playback rate, and the cache change rate of the current buffer area increases, it indicates that the buffer size of the buffer area is continuously increasing, and the change rate of the stream media download rate is higher than the playback rate , at this time, the network bandwidth can meet the streaming media playback, so that the buffer area occupied by the buffered data in the current buffer area can be used as the streaming media data buffer area for streaming media playback, which can reduce the waiting time for the initial streaming media playback.

In the above steps 209-210, if the download rate of the streaming media is lower than the playback rate, the cache change rate of the current buffer area does not increase, and when the growth rate of the download rate of the streaming media reaches the preset growth threshold, it means that the current streaming media data transmission is in the In the slow start interval of TCP, the network throughput rate will increase rapidly with time, and the network can satisfy the smooth playback of streaming media at this time.

In the above steps 211 and 214, if the download rate of the streaming media is lower than the playback rate, the cache change rate of the current buffer area does not increase, and the growth rate of the download rate of the streaming media does not reach the preset growth threshold, it means that the current network throughput rate is close to Or it tends to a steady state, and the network bandwidth is lower than the playback rate. At this time, the size of the buffer area of the streaming media data can be determined according to whether the buffered data in the current buffer area satisfies the smooth playback of the streaming media. Among them, if B>=G*(1-D/K), it means that the data in the current buffer area can satisfy the smooth playback of streaming media, and the G is the playback length of streaming media. When this formula is satisfied, it means that the cached data can satisfy the smooth playback of streaming media, and streaming media playback can be performed at this time to reduce the waiting time for the initial playback of streaming media; otherwise, it means that the streaming media data cached in the buffer area cannot satisfy smooth playback. At this point, the size of the buffer area can be adjusted in steps 211 and 213 .

In step 213-step 215, by judging whether G*(1-D/K) is greater than the maximum value of the buffer area of streaming media data, determine the size of the buffer area of streaming media data, be about to adjust the buffer area of streaming media data as A minimum value between the maximum value of the streaming media data buffer area and the current minimum value that can satisfy the smooth playback of streaming media, so as to reduce the waiting time for the initial playback of streaming media.

Those skilled in the art can understand that when the streaming media is initially played, as long as the buffer area data of the set streaming media data is full, the playback can be started. Therefore, by adjusting the size of the buffer area of the streaming media data, the smooth flow of the streaming media In the case of playback, the initial playback wait time can be reduced.

In order to have a better understanding of the technical solutions of the embodiments of the present invention, the download rate of the streaming media will be periodically detected during the initial playback of the streaming media, and the buffer size of the streaming media data will be periodically checked based on the download rate. The adjustment is taken as an example to illustrate the technical solution of the present invention. Wherein, the size of the cache area is represented by the time available for streaming media playback; the periodic time for detecting the download rate of the streaming media is set as tm, that is, each tm detects the download rate of the streaming media once and buffers the streaming media data area to make an adjustment.

FIG. 3 is a schematic flowchart of a method for playing streaming media provided by Embodiment 3 of the present invention. As shown in Figure 3, the method of this embodiment may include the following steps:

Step 301, receiving a streaming media playback instruction, and setting a buffer area of streaming media data with a preset size for streaming media playback, setting the initial value of the playback time t to 0, and starting timing for t;

Step 302, judging whether the current time t is equal to tm, if so, execute step 303, otherwise, continue to execute step 302 until t=tm;

Step 303, detect the download rate D of the streaming media, and judge whether the download rate D of the streaming media is greater than the play rate K of the streaming media, if yes, perform step 304, otherwise, perform step 308;

Step 304, adjusting the size of the streaming media data buffer to Ts=max(t, E);

Step 305, judging whether the current time t is greater than Ts, if yes, execute step 306, otherwise, execute step 307;

Step 306, play streaming media, end;

Step 307, judge whether the current time t is equal to t'+tm, wherein t' is the time of the previous detection of the download rate of streaming media, if so, step 303 is performed, otherwise, step 307 is continued until t is t'+tm;

Step 308, judging whether the buffer change rate S in the current buffer area increases, that is, whether S(t) is greater than S(t-1), if yes, execute step 309, otherwise, execute step 310;

Step 309, using the buffer area occupied by the buffered data in the current buffer area as the buffer area of the streaming media data, and performing step 306;

Step 310, judging whether the growth rate of the download rate of the current streaming media data increases exponentially, if so, execute step 309, otherwise, execute step 311;

Step 311, judging whether the current time t is greater than the preset waiting time Hs, if yes, execute step 309, otherwise, execute step 312;

Step 312, judging whether the buffered data B' in the current buffer area satisfies the condition: B'>=L*(1-D/K), if yes, execute step 309, otherwise, execute step 313;

Step 313 , adjust the buffer area Ts of the streaming media data to Ts=min(Bmax, L)*(1-D/K), and execute step 305 .

In the above step 301, after the client receives the streaming media playback instruction, it can set a streaming media data buffer area with a preset size for streaming media playback, and at the same time time the playback time t, and periodically detect the streaming media according to the tm cycle The download rate of the media, and periodically adjust the buffer area of the streaming media data.

In above-mentioned step 304, described Ts, E all refer to the time of streaming media playback, wherein, Ts represents the length of time available for streaming media playback when the buffer area is full, and E is a preset time, used to represent the streaming media playback time. The minimum length of time available for streaming when the buffer is full during media playback. The E is usually set to 0.5s-2s, and this E can also be called the protection time or the minimum delay of the initial playback, which is used to avoid the rapid exhaustion of the cache when the playable speed is greater than the download speed in the case of network bandwidth fluctuations And cause the problem of playback pause.

In the above step 308, when the buffer change rate S in the buffer area increases, it means that the download rate change rate is higher than the playback rate, and the current network bandwidth can meet the smooth playback of streaming media, and the playback can be started at this time.

In the above-mentioned step 310, when the download rate of the streaming media increases exponentially, that is, when the growth rate of the download rate reaches a preset growth threshold, it can be determined that the current network bandwidth is in the slow start interval of TCP, and the network throughput rate will increase accordingly. The time index increases rapidly to meet the smooth playback of streaming media, so playback can be started.

In the above step 311, the waiting time Hs is the preset maximum waiting time for the initial playback of the streaming media. When the waiting time Hs is exceeded, the waiting time for the user to watch the streaming media is too long, which will cause the user to watch the streaming media. Therefore, when the Hs is exceeded, it can be played directly; otherwise, the size of the buffer area of the streaming media data can be adjusted based on the size of the buffered streaming media data.

In the above-mentioned step 312, B' refers to the length of time that the buffered data in the buffer area of the streaming media data can be played by the streaming media, and L is exactly the total playing time of the streaming media, when B'>=L*(1-D /K), it means that the buffered data in the buffer area of streaming media data can satisfy the smooth playback of streaming media. In order to reduce the initial playback waiting time, the buffered data can be directly used for playback.

In the above step 313, Bmax is the maximum value of the streaming media data buffer area, and can also be referred to as the largest buffer area that the client can provide for streaming media playback.

In this embodiment, when a playback pause occurs during streaming media playback and playback needs to be restarted, the same steps as those shown in Figure 2 or Figure 3 above can be performed to adjust the buffer area of the streaming media data to reduce the playback pause time and improve the restart time. Play fluency. In addition, when the playback is restarted, the size of the buffer area of the current streaming media data can also be adjusted according to the number of pauses in the streaming media. In the following, a specific example will be used to illustrate the adjustment process of the buffer area of the streaming media data when the streaming media playback needs to be restarted due to a pause.

FIG. 4 is a schematic flowchart of a method for playing streaming media according to Embodiment 4 of the present invention. As shown in Figure 4, the method of this embodiment may include the following steps:

Step 401, during streaming media playback, when the playback pauses, record the current time t1 of the playback pause, and continue timing t1;

Step 402, whether the current time t is equal to t1+tm, if yes, execute step 403, otherwise, continue to execute step 402 until t=t1+tm;

Step 403, detect the download rate D of the streaming media, and judge whether the download rate D of the streaming media is greater than the playback rate K of the streaming media, if yes, perform step 404, otherwise, perform step 408;

Step 404, adjusting the size of the streaming media data buffer to Tr=max(t-t1, E);

Step 405, judging whether the current time t is greater than t1+Tr, if yes, execute step 406, otherwise, execute step 407;

Step 406, play streaming media, end;

Step 407, judge whether the current time t is equal to t'+tm, wherein t' is the time of the previous detection of the download rate of streaming media, if so, step 403 is performed, otherwise, step 407 is continued until t is t'+tm;

Step 408, judging whether the number of pauses of streaming media playback exceeds the preset number of times n, increasing the size of the current buffer area when the number of pauses exceeds the preset number of times n, and performing step 409;

Step 409, judging whether the buffer change rate S in the current buffer area increases, that is, whether S(t) is greater than S(t-1), if yes, execute step 410, otherwise, execute step 411;

Step 410, use the buffer area occupied by the buffered data in the current buffer area as the buffer area of the streaming media data, and execute step 406;

Step 411, judging whether the growth rate of the download rate of the current streaming media data increases exponentially, if yes, execute step 410, otherwise, execute step 412;

Step 412, judging whether the current time t is greater than the preset waiting time Hr, if yes, execute step 410, otherwise, execute step 413;

Step 413, judging whether the cached data B' in the current buffer area satisfies the condition:

B'>=R*(1-D/K), if yes, execute step 410, otherwise, execute step 414;

Step 414 , adjust the buffer area Tr of the streaming media data to Tr=min(Bmax, R)*(1-D/K), and execute step 405 .

In this embodiment, the above-mentioned Tr is the time length that the streaming media can be played when the buffer area is full when the playback is paused and restarted; the above-mentioned R is the remaining time of the streaming media playback; the above-mentioned Hr is when the playback is paused and needs to be restarted. The maximum delay for restarting playback set by restarting playback. If the waiting time for restarting playback exceeds this Hr, it means that the playback pause is too long, which will affect the user's viewing experience.

This embodiment can adjust the size of the buffer area of the streaming media data in real time based on the streaming media download speed and playback speed when the playback is paused and restarted, so as to reduce the waiting time for the streaming media to restart playing.

In the above step 408, based on the number of playback pauses, and when the number of pauses is greater than the preset number of pauses n, it means that there are too many pauses in playback. At this time, the size of the buffer area of the streaming media data can be increased, so that streaming media playback can be avoided. Too many pauses will affect the fluency of streaming media playback and the viewing effect of users.

In the various embodiments of the present invention described above, in the streaming media playback process, the cache change rate in the current buffer area can be obtained according to the download rate and playback rate of the stream media, and when the cache change rate increases, the cache of the streaming media data is increased. The size of the zone. Those skilled in the art can understand that during streaming media playback, the streaming media server will continue to send streaming data through the network, and the sending of streaming data will be limited by the size of the TCP sliding window, and the TCP sliding window is determined by min(RWD, CWD), Where RWD is the receive window and CWD is the congestion window. In this case, by adjusting the size of the buffer area, it is possible to prevent the length of the buffer from becoming a limitation of the download bandwidth during streaming media playback.

Specifically, in practical applications, in order to ensure the smooth viewing of streaming media, when the available bandwidth of the network is large, it should download as much as possible to store enough content, so that when the available bandwidth is temporarily reduced, the cached content will not be used up , resulting in playback pause, therefore, this embodiment can increase the size of the buffer area to S*R when the change rate of the buffer increases, where R is the remaining playback time of the streaming media until S*R is equal to Bmax.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

FIG. 5 is a schematic structural diagram of a streaming media playback device provided by Embodiment 5 of the present invention. As shown in Figure 5, the device of this embodiment may include a detection module 11 and an adjustment module 12, wherein:

Detection module 11, is used for detecting the download rate that obtains streaming media;

The adjustment module 12 is used to adjust the size of the buffer area of the streaming media data according to the download rate and the playback rate of the streaming media, wherein the buffer area of the streaming media data is a data storage for caching the streaming media data space.

The streaming media playback device of this embodiment can realize the playback of streaming media based on the method of the above-mentioned embodiment of the present invention, and can dynamically adjust the size of the buffer area of the streaming media data according to the streaming media download rate, and its specific implementation can refer to the implementation of the above-mentioned method of the present invention Example description.

In the embodiment shown in FIG. 5 , the above-mentioned adjustment module 12 can specifically be used to, during the initial playback of the streaming media or restart playback after a pause, when the download rate is greater than or equal to the playback rate, the streaming media The size of the buffer area of the data is adjusted to the first buffer length, so that the streaming media starts to be played after the buffer area of the streaming media data of the preset minimum buffer length is full, and the first buffer length is in the current buffer area The maximum value between the length of the cache area occupied by the cached data and the preset minimum cache length.

Further, the above-mentioned adjustment module 12 can also be used to obtain the data in the current buffer according to the download rate and the playback rate when the download rate is lower than the playback rate during the initial playback of the streaming media or restarting the playback after a pause. cache change rate, and adjust the size of the buffer area of the streaming media data according to the cache change rate; wherein, the cache change rate S(t)=D(t)-K(t), wherein, D(t ) is the download rate of the streaming media, K(t) is the playback rate of the streaming media, and the change rate of the buffer is used to represent the amount of change in which the data in the buffer increases or decreases.

Further, the adjustment module 12 mentioned above can be specifically configured to use the buffer area occupied by the buffered data in the current buffer area as the buffer area of the streaming media data when the buffer change rate of the current buffer area increases, so as to start playing the streaming media. And when the rate of change of the current buffer area does not change or decrease, and the growth rate of the download rate reaches a preset growth threshold, the buffer area occupied by the cached data in the current buffer area is used as a buffer for streaming media data zone to start streaming.

Further, the above-mentioned adjustment module 12 can specifically be used to: when the change rate of the current buffer area does not change or decrease, and the growth rate of the download rate does not reach the preset growth threshold or declines, according to the cached data in the current buffer area The size of the data is to adjust the size of the buffer area of the streaming media data. Specifically, the adjustment module 12 may be configured to use the buffer area occupied by the cached data in the current buffer area as A buffer area for streaming media data, so as to start playing streaming media; wherein, the G is the length of the unplayed streaming media, D is the download rate, and K is the playback rate. And the adjustment module 12, the data B that can also be used for the buffering of the current buffer area does not satisfy the condition: B>=G*(1-D/K), and G*(1-D/K) is not greater than the buffer area of streaming media data When the maximum value of , the length of G*(1-D/K) is used as the size of the buffer area of the streaming media data, so as to start playing the streaming media after the buffer area of the streaming media data is full.

Further, the adjustment module 12 mentioned above can also be used to increase the size of the buffer area of the streaming media data when the playback of the streaming media is restarted after the pause, if the number of pauses is greater than the preset pause threshold.

Further, the above-mentioned detection module 11 can specifically be used to detect the download rate of the streaming media at the preset time after starting the streaming media playback instruction, or restarting the playback after a pause; or, for starting the streaming media playback instruction, or Restart after a pause After the playback starts, periodically detect the download rate of the streaming media.

Further, the above-mentioned adjustment module 12 can also be used to reset the buffer area occupied by the buffered data in the current buffer area if the playback waiting time exceeds the preset waiting time during the initial playback of the streaming media or restarting the playback after a pause. As a buffer area for streaming media data, in order to start playing streaming media.

Further, the above-mentioned adjustment module 12 can also be used to obtain the buffer change rate in the current buffer area according to the download rate and playback rate during streaming media playback, and increase the stream rate when the buffer change rate increases. The size of the media data buffer.

FIG. 6 is a schematic structural diagram of a streaming media playback device provided by Embodiment 6 of the present invention. On the basis of the technical solution of the embodiment shown in FIG. 5 above, as shown in FIG. 6, the device of this embodiment may also include a play instruction receiving module 13 for receiving a streaming media playback instruction and setting a preset size for streaming media playback The streaming media data storage space is used as a buffer area for playing the initial streaming media data of the streaming media.

FIG. 7 is a schematic structural diagram of a streaming media playback device provided by Embodiment 7 of the present invention. As shown in FIG. 7 , the streaming media playback device of this embodiment may include a processor 10 and a memory 20, the processor 10 may be connected to the memory 20 through a bus, wherein the memory 20 may be used to store instructions, and the processor 10 is used to execute the instructions Used to perform related operations. Specifically, the processor 10 can execute the instructions stored in the memory 20 to detect the download rate of the streaming media, and to adjust the size of the buffer area of the streaming media data according to the download rate and the playback rate of the streaming media, wherein, The streaming media data buffer area is a data storage space for caching the streaming media data.

In this embodiment, the processor 10 can be specifically configured to adjust the size of the buffer area of the streaming media data to The first buffer length, in order to start playing the streaming media after the buffer area of the streaming media data of the preset minimum buffer length is full, the first buffer length is the buffer area occupied by the buffered data in the current buffer area The maximum value between the length and the preset minimum cache length.

Further, the processor 10 can also be used to obtain the buffer change rate in the current buffer according to the download rate and the playback rate when the download rate is lower than the playback rate during the initial playback of the streaming media or restarting playback after a pause. , and adjust the size of the buffer area of the streaming media data according to the cache change rate; wherein, the cache change rate S(t)=D(t)-K(t), where D(t) is the stream The download rate of the media, the play rate of K(t) streaming media, and the change rate of the buffer is used to indicate the amount of change in the increase or decrease of data in the buffer.

Further, the processor 10 is further configured to use the buffer area occupied by the buffered data in the current buffer area as a buffer area for streaming media data when the buffer change rate of the current buffer area increases, so as to start playing the streaming media.

Further, the processor 10 is further configured to, when the change rate of the current buffer area does not change or decrease, and the growth rate of the download rate reaches a preset growth threshold, set the buffer area occupied by the cached data in the current buffer area to As a buffer area for streaming media data, in order to start playing streaming media.

Further, the processor 10 is further configured to: when the change rate of the current buffer area does not change or decreases, and the growth rate of the download rate does not reach a preset growth threshold or decreases, according to the size of the cached data in the current buffer area , to adjust the size of the streaming media data buffer.

Further, the processor 10 can also be used to set the buffer area occupied by the cached data in the current buffer area to As a buffer area for streaming media data, so as to start playing streaming media; wherein, the G is the length of the unplayed streaming media, D is the download rate, and K is the playback rate.

Further, the processor 10 can also be used for the data B buffered in the current buffer area does not meet the condition: B>=G*(1-D/K), and G*(1-D/K) is not greater than the cache of streaming media data When the maximum value of the area is set, the length of G*(1-D/K) is used as the size of the buffer area of the streaming media data, so as to start playing the streaming media after the buffer area of the streaming media data is full.

In this embodiment, the processor 10 is further configured to increase the size of the buffer area of the streaming media data when the streaming media is paused and the playback is restarted, if the number of pauses is greater than a preset pause threshold.

In this embodiment, the processor 10 can also be used to detect the download rate of the streaming media at a preset time after starting the streaming media playback instruction, or restarting the playback after a pause; or, starting the streaming media playback instruction, or restarting after a pause After the playback starts, periodically detect the download rate of the streaming media.

In this embodiment, the processor 10 may also be configured to receive a streaming media playing instruction, and set a preset size of streaming media data storage space for streaming media playing as a buffer area for initially playing streaming media data.

In this embodiment, the processor 10 is further configured to use the buffer area occupied by the buffered data in the current buffer area as The buffer area of streaming media data, in order to start playing streaming media.

In this embodiment, the processor 10 can also be used to obtain the buffer change rate in the current buffer area according to the download rate and playback rate during streaming media playback, and increase the streaming media rate when the buffer change rate increases. The size of the data buffer.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (24)

1. a flow media playing method, it is characterised in that including:

Detection obtains the downloading rate of Streaming Media；

According to described downloading rate and the playback rate of Streaming Media, adjusting the size of the buffer area of stream medium data, wherein, the buffer area of described stream medium data is the data space carrying out caching for streaming media data；

Wherein, described according to described downloading rate and the playback rate of Streaming Media, adjust the size of the buffer area of stream medium data, specifically include:

During streaming media playing, obtain the caching rate of change in current cache district according to described downloading rate and playback rate, and when described caching rate of change increases, increase the size of the buffer area of stream medium data.

Flow media playing method the most according to claim 1, it is characterised in that described according to described downloading rate and the playback rate of Streaming Media, adjusts the size of the buffer area of stream medium data, specifically includes:

Restart in playing process after described Streaming Media initial play or pause, when described downloading rate is more than or equal to described playback rate, the size of the buffer area of stream medium data is adjusted to the first buffer storage length, and described first buffer storage length is the length of the most data cached buffer area taken and the maximum in the minimal cache length preset in current cache district.

Flow media playing method the most according to claim 2, it is characterised in that also include:

Restart in playing process after described Streaming Media initial play or pause, when described downloading rate is less than playback rate, obtain the caching rate of change in current cache district according to described downloading rate and playback rate, and adjust the size of the buffer area of described stream medium data according to described caching rate of change；

Wherein, described caching rate of change S (t)=D (t)-K (t), wherein, D (t) is the downloading rate of Streaming Media, the playback rate of K (t) Streaming Media, described caching rate of change is for representing the variable quantity that in buffer area, data increase or reduce.

Flow media playing method the most according to claim 3, it is characterised in that described according to the caching rate of change in current cache district, adjusts the size of the buffer area of described stream medium data, specifically includes:

When caching rate of change in current cache district increases, using the buffer area taken the most data cached in current cache district as the buffer area of stream medium data, in order to commence play out Streaming Media.

Flow media playing method the most according to claim 3, it is characterised in that described according to the caching rate of change in current cache district, adjusts the size of the buffer area of described stream medium data, specifically includes:

Rate of change in current cache district is not changed in or reduces, and the rate of increase of described downloading rate reaches to preset when increasing threshold value, using the buffer area taken the most data cached in described current cache district as the buffer area of stream medium data, in order to commence play out Streaming Media.

Flow media playing method the most according to claim 3, it is characterised in that described according to the caching rate of change in current cache district, adjusts the size of the buffer area of described stream medium data, specifically includes:

Rate of change in current cache district is not changed in or reduces, and the rate of increase of described downloading rate is not up to preset when increasing threshold value or decline, and according to the size of the data cached in current cache district, adjusts the size of the buffer area of described stream medium data.

Flow media playing method the most according to claim 6, it is characterised in that the described size according to the data cached in current cache district, adjusts the size of the buffer area of described stream medium data, specifically includes:

Data B cached in current cache district meet condition: B >=G* (1-D/K) time, using the buffer area taken the most data cached in described current cache district as the buffer area of stream medium data, in order to commence play out Streaming Media；

Wherein, described G is the length of the Streaming Media do not play, and D is downloading rate, and K is playback rate.

Flow media playing method the most according to claim 7, it is characterised in that also include:

Data B of current cache district caching are unsatisfactory for condition: B >=G* (1-D/K), and G* (1-D/K) is when being not more than the maximum of buffer area of stream medium data, using the length of described G* (1-D/K) as the size of the buffer area of stream medium data, in order to commence play out Streaming Media after the buffer area of described stream medium data is full.

Flow media playing method the most according to claim 1, it is characterised in that also include:

When restarting broadcasting after described Streaming Media pauses, if pause number of times is more than when presetting pause threshold value, increase the size of the buffer area of stream medium data.

10. according to the arbitrary described flow media playing method of claim 1-9, it is characterised in that described detection obtains the downloading rate of Streaming Media, specifically includes:

Starting streaming media playing instruction, or restarting after pausing and play the Preset Time detection after starting and obtain the downloading rate of Streaming Media；

Or, starting streaming media playing instruction, or restarting after pausing after broadcasting starts, periodically detection obtains the downloading rate of Streaming Media.

11. according to the arbitrary described flow media playing method of claim 1-9, it is characterised in that also include:

Receiving stream media play instruction, and the stream medium data memory space the presetting size buffer area as the initial stream medium data of playing stream media is set for streaming media playing.

12. according to the arbitrary described flow media playing method of claim 2-9, it is characterised in that also include:

Restart in playing process, if waiting time exceedes the default waiting time, using the buffer area taken the most data cached in current cache district as the buffer area of stream medium data, in order to commence play out Streaming Media in described Streaming Media initial play or after pausing.

13. 1 kinds of streaming medium playing device, it is characterised in that including:

Detection module, obtains the downloading rate of Streaming Media for detection；

Adjusting module, for according to described downloading rate and the playback rate of Streaming Media, adjusting the size of the buffer area of stream medium data, wherein, the buffer area of described stream medium data is the data space carrying out caching for streaming media data；

Wherein, described adjusting module, specifically for during streaming media playing, obtain the caching rate of change in current cache district according to described downloading rate and playback rate, and when described caching rate of change increases, increase the size of the buffer area of stream medium data.

14. streaming medium playing device according to claim 13, it is characterized in that, described adjusting module, specifically for restarting in playing process after described Streaming Media initial play or pause, when described downloading rate is more than or equal to described playback rate, the size of the buffer area of stream medium data is adjusted to the first buffer storage length, and described first buffer storage length is the length of the most data cached buffer area taken and the maximum in the minimal cache length preset in current cache district.

15. streaming medium playing device according to claim 14, it is characterized in that, described adjusting module, it is additionally operable to restart in playing process after described Streaming Media initial play or pause, when described downloading rate is less than playback rate, obtain the caching rate of change in current cache district according to described downloading rate and playback rate, and adjust the size of the buffer area of described stream medium data according to described caching rate of change；

Wherein, described caching rate of change S (t)=D (t)-K (t), wherein, D (t) is the downloading rate of Streaming Media, the playback rate of K (t) Streaming Media, described caching rate of change is for representing the variable quantity that in buffer area, data increase or reduce.

16. streaming medium playing device according to claim 15, it is characterized in that, described adjusting module is when the size of the buffer area for adjusting described stream medium data according to described caching rate of change, when increasing specifically for the caching rate of change in current cache district, using the buffer area taken the most data cached in current cache district as the buffer area of stream medium data, in order to commence play out Streaming Media.

17. streaming medium playing device according to claim 15, it is characterized in that, described adjusting module is when the size of the buffer area for adjusting described stream medium data according to described caching rate of change, specifically for being not changed at the rate of change in current cache district or reducing, and the rate of increase of described downloading rate reaches to preset when increasing threshold value, using the buffer area taken the most data cached in described current cache district as the buffer area of stream medium data, in order to commence play out Streaming Media.

18. streaming medium playing device according to claim 15, it is characterized in that, described adjusting module is when the size of the buffer area for adjusting described stream medium data according to described caching rate of change, specifically for being not changed at the rate of change in current cache district or reducing, and the rate of increase of described downloading rate not up to presets when increasing threshold value or decline, according to the size of the data cached in current cache district, adjust the size of the buffer area of described stream medium data.

19. streaming medium playing device according to claim 18, it is characterized in that, described adjusting module is for the size according to the data cached in current cache district, during the size of the buffer area adjusting described stream medium data, data B specifically for having cached in current cache district meet condition: B >=G* (1-D/K) time, using the buffer area taken the most data cached in described current cache district as the buffer area of stream medium data, in order to commence play out Streaming Media；

Wherein, described G is the length of the Streaming Media do not play, and D is downloading rate, and K is playback rate.

20. streaming medium playing device according to claim 19, it is characterized in that, described adjusting module, data B being additionally operable to current cache district caching are unsatisfactory for condition: B >=G* (1-D/K), and G* (1-D/K) is when being not more than the maximum of buffer area of stream medium data, using the length of described G* (1-D/K) as the size of the buffer area of stream medium data, in order to commence play out Streaming Media after the buffer area of described stream medium data is full.

21. streaming medium playing device according to claim 13, it is characterised in that described adjusting module, when being additionally operable to restart broadcasting after described Streaming Media pauses, if pause number of times is more than when presetting pause threshold value, increase the size of the buffer area of stream medium data.

22. according to the arbitrary described streaming medium playing device of claim 13-21, it is characterised in that described detection module, specifically for starting streaming media playing instruction, or restarts after pausing and plays the Preset Time detection after starting and obtain the downloading rate of Streaming Media；Or, for starting streaming media playing instruction, or to restart after pausing after broadcasting starts, periodically detection obtains the downloading rate of Streaming Media.

23. according to the arbitrary described streaming medium playing device of claim 13-21, it is characterised in that also include:

Play instruction receiver module, for receiving stream media play instruction, and sets the stream medium data memory space the presetting size buffer area as the initial stream medium data of playing stream media for streaming media playing.

24. according to the arbitrary described streaming medium playing device of claim 14-21, it is characterized in that, described adjusting module, it is additionally operable to restart in playing process after described Streaming Media initial play or pause, if waiting time exceedes the default waiting time, using the buffer area taken the most data cached in current cache district as the buffer area of stream medium data, in order to commence play out Streaming Media.