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Since I did not manage to get the audio work with

ffmpeg -i video.mp4 -acodec copy -vcodec copy out.avi

I'm searching for an audio format to which I can convert aac lost-free. Does such an audio-format exist for this scope?

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AAC is lossy. Period. –  Ignacio Vazquez-Abrams Jun 21 '12 at 13:48
    
Are you talking about ALAC (Apple Lossless Audio Codec)? As in you want to convert a file in alac to something else? –  bahamat Jun 21 '12 at 18:33
3  
You can convert it to a lossless format such as FLAC, but you'd get the worst of both worlds: quality of a lossy file and size of a lossless file... –  hhaamu Jun 21 '12 at 20:41
    
well, there is always uncompressed PCM... –  sendmoreinfo Jan 28 '13 at 21:09

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