https://wiki.multimedia.cx/index.php?action=history&feed=atom&title=Pixar_codecs 2026-05-25T04:06:21Z Revision history for this page on the wiki MediaWiki 1.39.5 https://wiki.multimedia.cx/index.php?title=Pixar_codecs&diff=16082&oldid=prev 2025-08-24T16:20:09Z

<p>fill known information</p> <p><b>New page</b></p><div>* Company: Pixar<br /> * FOURCCS: pix0, pix1, pix2, pix3, pix4, pix5, pix6, pix7, pixA<br /> <br /> These codecs are employed to compress paletted data in [[QuickTime_container|MOV]].<br /> <br /> == Pixar codecs 0 and 4 ==<br /> These codecs store uncompressed image split into 4x4 tiles.<br /> <br /> == Pixar codecs 1 and 2 ==<br /> Not much is known, but they seem to be similar to codec 3.<br /> <br /> == Pixar codec 3 ==<br /> <br /> This codec employs vector quantisation, so instead of transmitting each frame tile, only the codebook (or its update) plus tile indices are transmitted.<br /> <br /> Frame format:<br /> * 16-bit big-endian number of tiles in codebook (update)<br /> * codebook update (the number of entries is specified above):<br /> ** 16-bit codebook entry ID<br /> ** 16 bytes of tile data<br /> * compressed frame description<br /> <br /> Frame description consists of 16-bit opcodes specifying the operation:<br /> * 0-159 - leave that number of tiles unchanged from the previous frame<br /> * 160-319 - restore (opcode-159) tiles from the initial background frame (note: the frame is not coded in the file but rather provided by the game engine from elsewhere)<br /> * 320-65535 - paint tile (opcode-320) from the codebook<br /> <br /> == Pixar codec 5 ==<br /> <br /> This is an extension of codec 3. Now frame data starts with 16-bit big-endian frame number and probably the total number of tiles. If that value is not zero or 0xFFFF, two additional 16-bit values should be read. The rest is the same as in codec 3.<br /> <br /> == Pixar codec 6 ==<br /> Probably similar to codec 5.<br /> <br /> == Pixar codec 7 ==<br /> Unknown, but it seems to employ Huffman compression.<br /> <br /> == Pixar codec A ==<br /> Unknown, but it seems to be not tile-based on the first glance.<br /> <br /> == Games using these codecs ==<br /> <br /> [https://www.mobygames.com/game/119619/disneys-toy-story-activity-center/ Toy Story Activity Center]<br /> <br /> [[Category:Video Codecs]]<br /> [[Category:Game Formats]]<br /> [[Category:Incomplete Video Codecs]]</div>

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