SheerVideo User Manual Sheer CodecsSheer Y'CbCr 10bv[A] 4:4:4[:4] Sheer Y'CbCr[A] 10bv 4:4:4[:4] is for use in applications for compositing high-precision digitized video. This codec perfectly encodes all Y'CbCr[A] 10bv 4:4:4[:4] source footage in real time, with an average compression power of 2.84, so that the Sheer Y'CbCr[A] 10bv 4:4:4[:4] files take up only 35% as much space as the uncompressed Y'CbCr[A] 10bv 4:4:4[:4] originals, with zero loss of information. Sheer Y'CbCr[A] 10bv 4:4:4[:4] both encodes and decodes losslessly in real time from and to all Y'CbCr[A] 10bv 4:4:4[:4] pixel formats (10-bit 'r4fl', 10-bit 'V416', and 'v410'), making it ideal for editing in those formats. For faster but lower-quality display, the Sheer Y'CbCr[A] 10bv 4:4:4[:4] codec can also decode in real time to Y'CbCr[A] 8bv 4:4:4[:4] pixel formats ('v408', 'VUYA', and 'r408'), and to Y'CbCr[A] 10|8bv 4:2:2[:4] pixel formats ('v210', 'v216', and 'Y216', '2vuy', '2Vuy', and 'yuvs'). This codec also losslessly decodes to RGB[A] ≥12bf pixel formats ('b64a', 'L64A', and 'A46L') using Synchromy.
In addition, Sheer Y'CbCr[A] 10bv 4:4:4[:4] uses Synchromy to decode with the minimal loss theoretically possible
to RGB[A] <12bf|v pixel formats ('F10k', 'F210', 'R10k', 'r210', 'S10k', 'S210', ARGB, and, on PC+Windows, ABGR, RGBA, BGRA, RGB, and BGR).
Sheer Y'CbCr[A] 10bv 4:4:4[:4] has four variant formats: with versus without alpha, and progressive versus interlaced scan mode. 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.
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