Difference between revisions of "MUX"

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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.
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.
== File Format ==
All multi-byte numbers are little endian. The file format is laid out as follows:
  bytes 0-27      unknown
  bytes 28-29      video width
  bytes 30-31      video height
  bytes 32-16383  frame offset table
Each frame offset is 32 bits. There is enough space in the chunk offset table for 4087 media chunks. The top 2 bits of each offset always appear to be 1 (so the top byte of the chunk is always 0xC0), so these are probably flags of some sort. The last entry in the table is all 1s (0xFFFFFFFF) and the remainder of the table is all 0s.
Frames contain 1 or more chunks, each of which are formatted in a manner that is reminiscent of the [[Flic Video|Autodesk FLIC format]]:
  bytes 0-1    chunk type
  bytes 2-5    chunk size, not including this 6-byte header
  bytes 6..    chunk payload
Known chunk types appear to include:
  0007    unsigned, 8-bit [[PCM]] audio
  0070    apparently a palette chunk, 0x300 (768) bytes, and each
          component is 8 bits (not 6 bits, like VGA palettes are
          normally stored)
  006F    video chunk
  0005    frame count: 2-byte payload contains frame number
== Video Format ==
The corresponding video coding format is presently unknown.
== Games That Use MUX ==
These games are known to use MUX files for FMV:
* [http://www.mobygames.com/game/dos/chaos-control Chaos Control]
* [http://www.mobygames.com/game/dos/prisoner-of-ice Prisoner of Ice]
* [http://www.mobygames.com/game/dos/time-gate-knights-chase Time Gate: Knight's Chase]
[[Category:Video Codecs]]
[[Category:Undiscovered Video Codecs]]
[[Category:Game Formats]]
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== File Format ==
== File Format ==

Revision as of 19:52, 23 March 2006

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.

File Format

All multi-byte numbers are little endian. The file format is laid out as follows:

 bytes 0-27       unknown
 bytes 28-29      video width
 bytes 30-31      video height
 bytes 32-16383   frame offset table

Each frame offset is 32 bits. There is enough space in the chunk offset table for 4087 media chunks. The top 2 bits of each offset always appear to be 1 (so the top byte of the chunk is always 0xC0), so these are probably flags of some sort. The last entry in the table is all 1s (0xFFFFFFFF) and the remainder of the table is all 0s.

Frames contain 1 or more chunks, each of which are formatted in a manner that is reminiscent of the Autodesk FLIC format:

 bytes 0-1    chunk type
 bytes 2-5    chunk size, not including this 6-byte header
 bytes 6..    chunk payload

Known chunk types appear to include:

 0007    unsigned, 8-bit PCM audio
 0070    apparently a palette chunk, 0x300 (768) bytes, and each 
         component is 8 bits (not 6 bits, like VGA palettes are 
         normally stored)
 006F    video chunk
 0005    frame count: 2-byte payload contains frame number

Video Format

The corresponding video coding format is presently unknown.

Games That Use MUX

These games are known to use MUX files for FMV:


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File Format

All multi-byte numbers are little endian. The file format is laid out as follows:

 bytes 0-27       unknown
 bytes 28-29      video width
 bytes 30-31      video height
 bytes 32-16383   frame offset table

Each frame offset is 32 bits. There is enough space in the chunk offset table for 4087 media chunks. The top 2 bits of each offset always appear to be 1 (so the top byte of the chunk is always 0xC0), so these are probably flags of some sort. The last entry in the table is all 1s (0xFFFFFFFF) and the remainder of the table is all 0s.

Frames contain 1 or more chunks, each of which are formatted in a manner that is reminiscent of the Autodesk FLIC format:

 bytes 0-1    chunk type
 bytes 2-5    chunk size, not including this 6-byte header
 bytes 6..    chunk payload

Known chunk types appear to include:

 0007    unsigned, 8-bit PCM audio
 0070    apparently a palette chunk, 0x300 (768) bytes, and each 
         component is 8 bits (not 6 bits, like VGA palettes are 
         normally stored)
 006F    video chunk
 0005    frame count: 2-byte payload contains frame number

Video Format

The corresponding video coding format is presently unknown.

Games That Use MUX

These games are known to use MUX files for FMV: