- Extension: mux
- Samples: http://samples.mplayerhq.hu/game-formats/chaoscontrol-mux/
MUX is a full motion video format used in a small number of computer games. The format packages raw, unsigned, 8-bit PCM audio along with a custom video coding format.
All multi-byte numbers are little endian. The file format is laid out as follows:
dword signature - file signature, 0xAA07 word headersize - size of the whole header, including frames table word unknown1 word unknown2 word unknown3 word framerate - movie playback rate, direct PIC initializer word soundfrequency - audio playback frequency word audio_flags1 - unknown word audio_flags2 - unknown word soundbuffer_size - suggested size of the single audio buffer dword chunkbuffer_size - suggested size of the chunk load buffer word sound_buffers - suggested number of sound buffers word width - width of the frame word height - height of the frame
Then followed by frame offsets table. Each frame offset is 32 bits. The top 2 bits of each offset contains flags (completely ignored by original player) the rest is an absolute offset of the frame chunks. The last entry in the table is all 1s (0xFFFFFFFF) and the remainder of the table is all 0s. Note, that table contains offset to the first chunk of each frame. This chunk can be followed by other frame's chunks (ex, it's video, audio and palette parts), but they doesn't appear in offsets table.
Frames contain 1 or more chunks, each of which are formatted in a manner that is reminiscent of the Autodesk FLIC format:
byte 0 chunk type byte 1 chunk subtype bytes 2-5 chunk size, not including this 6-byte header bytes 6.. chunk payload
Known chunk types appear to include:
07 unsigned, 8-bit PCM audio 70 palette chunk, 0x300 (768) bytes/256 RGB components, and each component is 8 bits (not 6 bits, like VGA palettes are normally stored) 64, 6F video chunks 05 sync chunk. usually the last chunk of the frame, 2-byte payload contains frame number 04 eof-chunk, indicates end of the movie
The video format is mostly similar to HNM (1) compression.
Games That Use MUX
These games are known to use MUX files for FMV: