Re: Converting MKV to AVI

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Patrick O'Callaghan wrote:
> On Sat, 2010-05-08 at 12:31 -0400, sean darcy wrote:
>> Patrick O'Callaghan wrote:
>>> On Sat, 2010-05-08 at 10:00 -0400, sean darcy wrote:
>>>> Patrick O'Callaghan wrote:
>>>> [...]> 
>>>>> <rant>
>>>>> Part of the problem is that all the above tools are clearly aimed at
>>>>> people who know what they're doing. Those of us uninterested in a career
>>>>> in multimedia technology are liable to be completely lost when
>>>>> struggling with any of the (incomplete and ambiguous) manuals, not to
>>>>> mention the baroque syntax of the command-line options. Why are there no
>>>>> "multimedia conversion for dummies" tools in Linux as there are in
>>>>> Windoze?
>>>>> </rant>
>>>>>
>>>>> Anyway, my question is this: does anyone have a useful recipe for this
>>>>> kind of thing?
>>>>>
>>>>> And for extra credit: how about converting FLV (Flash video)?
>>>>>
>>>>> poc
>>>>>
>>>> First, I agree with your rant. What the world needs is a media recipe wiki.
>>>>
>>>> But I'd try again with ffmpeg. It has the most active development and 
>>>> user group. The helpful users make up for the lousy docs.
>>> Good to know :-)
>>>
>>>> 1. Do you have a very recent version of ffmpeg? I'd urge you to use svn, 
>>>> but at least 0.5.1.
>>> It's the standard Fedora repo version:
>>> ffmpeg-0.5-5.20091026svn.fc12.x86_64 so possibly not.
>>>
>> rpmfusion has ffmpeg-0.6-0.3.20100429svn
>>
>>
>>>> 2. ffmpeg -i source.mkv -vcodec copy -acodec copy output.avi , should 
>>>> work if source mkv is in mpeg-4 and mp3.
>>> It's H.264 and AC-3:
>>>
>>>   Duration: 01:32:04.57, start: 0.000000, bitrate: N/A
>>>     Stream #0.0: Video: h264, yuv420p, 1280x720, PAR 1:1 DAR 16:9, 25 tbr, 1k tbn, 50 tbc
>>>     Stream #0.1(eng): Audio: ac3, 48000 Hz, 2 channels, s16
>>>
>> Well AC-3 should work in your dvd, so try:
>>
>> ffmpeg -i source.mkv -vcodec mpeg2video -acodec copy output.avi
> 
> As soon as it starts I get:
> [...]
> [NULL @ 0x1570030]error, non monotone timestamps 12288 >= 12288
> av_interleaved_write_frame(): Error while opening file
> 
> poc
> 
> 
Ah, the dreaded non montone timestamp. See 
https://roundup.ffmpeg.org/issue807

try:
ffmpeg -i source.mkv -vcodec mpeg2video -acodec ac3 output.avi

Have you updated ffmpeg?

Let the ffmpeg user group be your friend.

sean

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