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SheerVideo User Manual

Sheer Codecs
Sheer Y'CbCr 8bv[A] 4:4:4[:4]


Sheer Y'CbCr[A] 8bv 4:4:4[:4] Sheer Y'CbCr[A] 8bv 4:4:4[:4] is for use in applications for compositing standard-precision digitized video.

This codec perfectly encodes all Y'CbCr[A] 8bv 4:4:4[:4] and Y'CbCr[A] 8bu 4:4:4[:4] source footage in real time, with an average compression power of 2.84, so that the Sheer Y'CbCr[A] 8bv 4:4:4[:4] files take up only 35% as much space as the uncompressed Y'CbCr[A] 8bu|v 4:4:4[:4] originals, with zero loss of information.

Sheer Y'CbCr[A] 8bv 4:4:4[:4] both encodes and decodes losslessly in real time from and to all Y'CbCr[A] 8bv 4:4:4[:4] pixel formats ('v408', 'VUYA', and 'r408'), making it ideal for editing in those formats.

For faster but lower-quality display, the Sheer Y'CbCr[A] 8bv 4:4:4[:4] codec can also decode in real time to Y'CbCr[A] 8bv 4:2:2[:4] pixel formats ('2vuy', '2Vuy', and 'yuvs').

This codec also losslessly decodes to Y'CbCr[A] >8bv 4:4:4[:4] pixel formats ('v410', 'V416', and 'r4fl'); and, thanks to Synchromy, to RGB[A] ≥9bf|v pixel formats ('b64a', 'L64A', 'A46L', 'F10k', 'F210', 'R10k', 'r210', 'S10k', and 'S210').

In addition, Sheer Y'CbCr[A] 8bv 4:4:4[:4] uses Synchromy to decode with the minimal loss theoretically possible to RGB[A] <10b pixel formats ('VRGB', ARGB, and, on PC+Windows, ABGR, RGBA, BGRA, RGB, and BGR) and to Y'CbCr[A] 4:2:2[:4] pixel formats ('v210', 'v216', 'Y216', '2vuy', '2Vuy', and 'yuvs').

Sheer Y'CbCr[A] 8bv 4:4:4[:4] Codec Encoding and Decoding Capabilities

Pixel lossless real-time
Pixel Type Format encode decode encode decode encode decode
RGB[A] 16bf 'b64a' 6b [] - -
RGB[A] 16bf 'L64A' 6b [] - -
RGB[A] 16bf 'A46L' 6b [] - -
RGB 16bf 'b48r' - - - - - -
RGB 10bf 'F10k' 6b α,[] - -
RGB 10bf 'F210' 6b α,[] - -
RGB 10b 'R10k' 6b α,{} - -
RGB 10b 'r210' 6b α,{} - -
RGB 10bv 'S10k' 6b α,{} - -
RGB 10bv 'S210' 6b α,{} - -
RGB[A] 8bf ARGB 6b [7b] - -
RGB[A] 8bf ABGR W W 6b [7b] - -
RGB[A] 8bf RGBA W W 6b [7b] - -
RGB[A] 8bf BGRA W W 6b [7b] - -
RGB[A] 8bv 'VRGB' {6b} {7b} - -
RGB 8bf RGB W W 6b α,[7b] - -
RGB 8bf BGR W W 6b α,[7b] - -
RGB 5bf B555 - - - - - -
RGB 5bf L555 - - - - - -
RGB 5bf L565 - - - - - -
Y'CbCr[A] 32bu 4:4:4[:4] 'r4fl' [8b]
Y'CbCr[A] 16bv 4:4:4[:4] 'V416' [8b]
Y'CbCr 10bv 4:4:4 'v410' α
Y'CbCr[A] 8bv 4:4:4[:4] 'v408'
Y'CbCr[A] 8bv 4:4:4[:4] 'VUYA'
Y'CbCr[A] 8bu 4:4:4[:4] 'r408'
Y'CbCr 16bv 4:2:2 'v216' - -
Y'CbCr 16bv 4:2:2 'Y216' - -
Y'CbCr 10bv 4:2:2 'v210' - -
Y'CbCr 8bv 4:2:2 '2vuy' - -
Y'CbCr 8bv 4:2:2 '2Vuy' - -
Y'CbCr 8bv 4:2:2 'yuvs' - -
Y'CbCr 8bw 4:2:2 'yuvu' - - - - - -
Y'CbCr 8bw 4:2:2 'yuv2' - - - - - -

Key:

fully supported
- not supported
W Windows only
[] in-range values only
{} in-range and mutual out-of-range values only
10b 10-bit precision only
α without alpha

Sheer Y'CbCr[A] 10bv 4:4:4[:4] has eight variant formats: video-range versus unbiassed-range, with versus without alpha, and progressive versus interlaced scan mode. The data range is selected automatically based on the pixel format provided by QuickTime, and is indicated by a v (video-range) or v (unbiassed-range) after the precision. Alpha is selected as a QuickTime setting, and is indicated by an A (Alpha) after the color-space name. The scan mode is selected as a Sheer setting, and is indicated by a p (progressive) or i (interlaced) at the end.

Sheer Y'CbCrA 10bv 4:4:4:4 p video-range with alpha progressive scan
Sheer Y'CbCrA 10bv 4:4:4:4 i video-range with alpha interlaced scan
Sheer Y'CbCr 10bv 4:4:4 p video-range without alpha progressive scan
Sheer Y'CbCr 10bv 4:4:4 i video-range without alpha interlaced scan
Sheer Y'CbCrA 10bu 4:4:4:4 p unbiassed-range with alpha progressive scan
Sheer Y'CbCrA 10bu 4:4:4:4 i unbiassed-range with alpha interlaced scan
Sheer Y'CbCr 10bu 4:4:4 p unbiassed-range without alpha progressive scan
Sheer Y'CbCr 10bu 4:4:4 i unbiassed-range without alpha interlaced scan


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