TM2X

• FOURCCs: TM2A, TM2X
• Company: On2 (formerly Duck)
• Sample: http://samples.mplayerhq.hu/V-codecs/TM2a.avi
• Sample: http://samples.mplayerhq.hu/V-codecs/TM2x.avi

Duck TrueMotion 2X is believed to be related to Duck TrueMotion 2.

Frame structure

Each frame consists of chunks with the following structure:

 0-2 always 0xA0 0x00 0x01
 3      chunk identifier
 4-7 chunk size (big-endian)
 8-... chunk payload

Analyzed frames have chunks in the following order:

• 0x06 (usually takes more than a half of coded frame)
• 0x15- small, variable size
• 0x09- 3 bytes long
• 0x02- two chunks of variable size
• 0x0B- there are always 16 of them with size=4. Maybe for some Huffman tables?
• 0x0A- variable size