[Ffmpeg-devel] [PATCH] xan_dpcm in MPlayer + libavformat

Mike Melanson mike
Sat Nov 18 02:17:58 CET 2006


Diego Biurrun wrote:
> IIUC MPlayer falls back on codec_id if codec_tag is not set.  The
> problem is that these AVI files mark the xan_dpcm audio as 0x1 (or was
> it FourCC Axan + TwoCC 0x1 Roberto?), which is PCM.  I don't think there
> is a way to support this without hacks..

Right. The people (Origin) that developed this format never applied with 
Microsoft for a specific codec ID; they didn't mean for these files to 
be played in general media players. They have codec ID 0x0001 (usually 
reserved for PCM). There is data elsewhere in the AVI file indicating 
'Axan'. All written up here:

   http://wiki.multimedia.cx/index.php?title=Xan_DPCM

-- 
	-Mike Melanson




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