Editing bitstream AR for MKV as opposed to header AR

[real copacetic]

Hi, I have some MKV files which are displaying in incorrect aspect ratio through some media players.

I think the problem is that the H.264 codec bitstream has an aspect ratio of 712x478 (checked with tsMuxeR), while the MKV header aspect ratio is 712 x 535 (MKVMerge). I think the latter is the correct AR for 4:3 and any media player that grabs the AR from the MKV header shows the files properly.

However, XBMC player appears to use the codec stream AR instead, resulting in a slightly "fatter" picture than 4:3 where everything is slightly stretched.

Is there a way to change the aspect ratio of the codec stream so that these files display in proper 4:3 in media players such as XBMC?

Thanks

[poisondeathray]

you can try this modified ffmpeg build to modify sar in bitstream

http://forum.doom9.org/showthread.php?t=152419

[real copacetic]

Thanks for your quick reply! I'll see if I can get my head around that,

Cheers again

[real copacetic]

hmm think that's above my head, cheers anyway