[FFmpeg-user] How to convert mov to avi or mp4 without loss of quality

Carl Eugen Hoyos cehoyos at ag.or.at
Wed Dec 25 19:30:30 CET 2013

Guido Van Hoecke <guivho <at> gmail.com> writes:

> $ ffmpeg -i 131003094512.mov -c copy 131003094512.mp4
> ffmpeg version 1.1.3

This is too old.

> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '131003094512.mov':

As said, why do want to change "mov" to "mp4"? 

>     Stream #0:0(eng): Video: h264 (Constrained Baseline)

You can remux this stream with -vcodec copy

>     Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73)

PCM audio is only supported in mov, not in mp4 (this has 
nothing to do with FFmpeg, the limitation is inthe mp4 
specification), you have to convert to a supported audio 
format, use for example -acodec aac -strict -2 (fdk is a 
better encoder, libvo-aac is not).

Carl Eugen

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