[Ffmpeg-devel] PTS / DTS with XViD
Sat Jul 22 03:26:59 CEST 2006
On Fri, Jul 21, 2006 at 08:01:13PM +0300, Jani Boutellier wrote:
> As a concluding remark, I'll have to state that the problem was not at all
> in the OGM format.
> After hours of trial and error I managed to get the XViD-encoded video into
> a MPEG4 -container (.mp4). Surprisingly the the abovementioned problem with
> OGM occurred also with mp4, so I figured that the true source of problems
> was XViD.
> Soon I discovered that the video clips I had used, contained a so-called
> "packed bitstream", which meant that the B-frames were crammed inside
> P-frames. After I changed this in encoding settings and re-encoded the
> video clips, the decoding worked well.
Did ffmpeg generate these bitstreams? I sure hope it's not calling
xvid with packed bitstream enabled...
> This means that although the OGM format was labeled as a "broken format" in
> this thread, it probably would work well also with b-frames. However, I
> didn't try that in practice anymore, since I'm happy with mp4 now :)
I imagine the timestamps would still be invalid but I'm not sure..
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