[FFmpeg-user] Bad keyframes when encoding to the ogg container format

Carl Eugen Hoyos cehoyos at ag.or.at
Sat Feb 11 12:37:41 CET 2012

Robert McIntyre <rlm <at> mit.edu> writes:

> This is my first post, sorry if this does not belong here.

This is definitely the right place

> Whenever I encode anything to an ogg container, running "ffmpeg -i
> <file>" on the file which is produced informs
> me "[ogg @ 0x2351de0] Broken file, keyframes not correctly marked."
> Seeking in the file is partially broken.

Could you elaborate?
A (ogg) sample that allows to reproduce this problem would 
be very welcome.


> Am I doing something wrong? The ancient ffmpeg I was using produced
> files that do not cause my current ffmpeg to tell me anything is wrong
> with the keyframes, and it produced them with the same command from
> above.

Can you confirm that the file encoded with the older FFmpeg 
does not show the warning message when decoded with current FFmpeg?

Carl EUgen

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