[Ffmpeg-devel] Re: Matroska Conversion Errors

Steve Lhomme slhomme
Fri Jul 21 16:05:26 CEST 2006

Ewan Grantham wrote:
> Well, I installed SVN and the development files for several object
> files, and did a build out of the SVN checkout I did this morning. I'm
> getting the same error. So evidently a "more recent" version of ffmpeg
> is not the answer.
> Anyone who can tell me what I SHOULD do to fix this?

Try the attached patch. It will also make FFMPEG support VFR Matroska files.

> On 7/20/06, Ewan Grantham <ewan.grantham at gmail.com> wrote:
>> Am currently using the version of FFMPeg that is packaged for Ubuntu
>> 6.06 (ffmpeg Version CVS, build 3276800). I am trying to convert a
>> .MKV (matroska) file to an MPEG-2 file so I can play it back on my
>> home Tivo.
>> Running the conversion, I see a number of errors like the following:
>> Error while decoding stream #0.0
>> [matroska @ 0x82c8200]FIXME: implement support for BlockDurations
>> [matroska @ 0x82c8200]FIXME: implement support for BlockDuration
>> [mpeg4  @ 0x82c8200]header damaged
>> Do I need a more recent version of ffmpeg? Or is there something wrong
>> with the following command line when decoding an MKV:
>> ffmpeg -i "Episode_01.mkv" -target ntsc-dvd -acodec mp2 -ab 192 -ac 2
>> -ar 48000 -b 4096 -r 29.97 -s 720x480 -vcodec mpeg2video "Episode
>> 01.mpg"
>> TIA,
>> Ewan
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