[packman] mlt/melt/kdenlive

[Axel Köllhofer]

Am Thu, 17 Jan 2013 12:00:01 +0100
schrieb packman-request at links2linux.de:

> 
> Message: 1
> Date: Wed, 16 Jan 2013 14:51:48 +0100
> From: Christoph Walzer <christoph.walzer at wcr-edv.com>
> To: packman at links2linux.de
> Subject: Re: [packman] mlt/melt/kdenlive
> Message-ID: <50F6B074.7000400 at wcr-edv.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
> 
> For the sake of simplicity we can leave kdenlive
> out of discussion since the problem is
> simply reproducible by playing an mp3 file
> with melt.
> 
> Compiled mlt-0.8.6 from sources. Compiled
> ffmpeg-1.1.git from sources -> same problem.
> 
> BUT: moving back to ffmpeg-1.0 (compiled
> from sources) -> all is good.
> 
> What i saw is: building mlt with ffmpeg-1.0
> links against libavutil51 while building
> with ffmpeg-1.1.git links against libavutil52.
> 
> Anyway: it seems to be definitely a mlt/ffmpeg
> compatibility problem, occuring since the new
> ffmpeg release.


Actually, this problem also affects at least  one other program
(ffmpeg2theora).

Output looks like this:

ffmpeg2theora <some file>

---snip---

[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed
[audioresample @ 0x86ab1a0] Audio sample format conversion failed

---snip---

This happens to all input formats I tried (avi with mp2/mp3 audio, mp4
with aac audio, flv with aac or mp3 etc.) and the output file is always
only a few KB of size without sound or video.

Transcoding without audio (--noaudio) works fine (not very surprising
though but also not very useful). 

Transcoding with 

"ffmpeg -i <some file> -vcodec libtheora -acodec libvorbis
<output_file>" 

also works, so as with mlt it looks like we have to wait
for upstream fixes of those projects relying on ffmpeg and not for some
fixes of ffmpeg itself.

Greetings,

AK
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