VirtualDub2 Wiki

Enable alpha

Possible inputs with Alpha:

• image sequences: tiff, tga, png, bmp (supported internally)
• gif, apng
• raw rgb32, bgra64
• certain VFW codecs (Utvideo, MagicYUV)
• all video/image/sequence formats supported by FFMPEG

Possible outputs with Alpha:

• image sequences: tiff, tga, png (supported internally)
• gif, apng
• raw rgb32, bgra64
• certain VFW codecs (Utvideo, MagicYUV)
• external encoder (for example ffmpeg)
• FFV1, Huffyuv encoders

Filters using alpha:

• Fill (internal): when enabled, fills only areas marked with alpha
• fflayer: uses source alpha for compositing

Alpha can be displayed in viewports if dx9 display is enabled.

New 16-bit processing formats

XRGB64 is format similar to XRGB but with 16 bit per component precision.
YUV420P16, YUV422P16, YUV444P16 are planar YUV formats similar to 8-bit YUV formats.

Supported features:

• Input and Output in a variety of ways (see below).
• Display (downconverted to 8 bit)
• Color picker can show fractional components and also raw R/G/B/A or Y/U/V values as stored in buffer:
  

Supported internal filters:

• crop / null transform
• flip vertical
• flip horizontal
• fill
• resize
• convert format

Not supported now (for example):

• blend curve (only fully opaque or fully transparent)

Deep color input options

• Caching input driver can read all formats supported by FFMPEG, this can be FFV1 video or DPX sequence or anything else (most useful formats translate directly to RGB64 or YUV###P16 without precision changes)
• Tiff image sequence is also supported internally and can read 16bit RGB/RGBA
• internal AVI input driver can read some bitmap formats from uncompressed file or vfw decoder (b64a, v210, P210, P216, ...)

Some known sources by bitmap format:

Note that when input source can decode to multiple formats, more precise format is selected automatically.
The actual format in use is displayed in "Video->Decode format..." dialog at the top:

Deep color output options

• integrated encoders:
  x264 supports 10 bit yuv (4:2:0, 4:2:2, 4:4:4) and 10 bit rgb
  FFV1 supports rgb/yuv from 9 bit to 16 bit
  FFVHuff supports rgb/yuv from 9 bit to 14 bit
• AVI: set output format to v210, YUV422P16 or XRGB64.
• Image sequence: TIFF sequence will store RGB64 at full precision (either 64 or 48 bits depending on alpha).
• External encoder: FFMPEG is easy to send RGB64 to, and it then can encode to any supported format.
  The key is to specify -pix_fmt %(pix_fmt) for input and also -pix_fmt desired_format for output.
  Example profiles: ffv1-yuva64, ffv1-rgb14

Some known VFW codecs accepting bitmap formats: