Re: Converting MKV to AVI

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sean darcy wrote:
> 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
> 
I look forward to a real fix on that, I have some input files which suffer from 
sync issues when re-encoded, although they don't blow up, they just wind up with 
the sound and video slightly offset. The originals are .ts files from vlc.

-- 
Bill Davidsen <davidsen@xxxxxxx>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot
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