[FFmpeg-user] mov to mp4 Error

s00b4u . s00b4u at gmail.com
Thu Oct 8 12:09:16 CEST 2015

Thanks Moritz. 
In future, I will make sure that I ask my questions in right forum. 

One question though,
How did you know from logs that it is problem with Audio? To me, it
looked like problem with Stream Mapping. The error came only after
Stream Mapping happened. 

Thanks again.

On Thu, Oct 08, 2015 at 11:09:12AM +0200, Moritz Barsnick wrote:
> Hi s00b4u,
> On Thu, Oct 08, 2015 at 14:01:07 +0530, s00b4u 4u wrote:
> Your attached output is very badly readable. I'll just assume that's
> gmail's fault. Perhaps a text file as attachment would be better.
> Anyway:
> > > *FFMPEG Version:ffmpeg version N-73929-ga906e86 Copyright (c) 2000-2015
> > > the FFmpeg developersbuilt with gcc 4.8 (Ubuntu
> > > 4.8.4-2ubuntu1~14.04)
> That's a bit old.
> But anyway:
> > ffmpeg -i 00019.mov -c copy 00019.mp4
> [...]
> > [mp4 @ 0x2c8fd40] Could not find tag for codec pcm_s24le in stream #1, codec not currently supported in container
> To my knowledge, the MP4 container does not support PCM audio, while
> your QuickTime (MOV) source format does. You can't simply copy the
> audio over, you will have to convert it to a compatible format.
> $ ffmpeg -i 00019.mov -c:v copy -c:a libfdk_aac 00019.mp4
> > However, if I try following command: "*ffmpeg -i 00019.mov 00019.mp4*",
> > then video gets transcoded without any problems.
> The "video", i.e. the video track was not the problem, it was the
> audio. You need to read the error messages carefully.
> > I want to keep quality of video exactly same in mp4.
> If that is also the case for audio (keeping "quality exactly"), you
> need to choose a lossless format. ALAC comes to mind, but you may have
> to google for yourself what is supported and acceptable to you.
> Moritz
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