[Libav-user] ALAC codec I am not sure it's really lossless

kurdy kurdy_ch-forum at yahoo.fr
Sat Jun 2 10:15:59 CEST 2012

As flac is lossless the number of frame and md5 code of the track should be
the same. But I did the test you propose I extract from the flac the wav and
I launch:

avconv -i file.wav -acodec alac file.m4a 

and surprised I got an Apple lossless audio 

Conclusion with command  

avconv -i file.flac -acodec alac file.m4a   you get an acc  a lossy
compressed file which is not what I was expecting.

For me this a bug and many people use avconv or ffmpeg to create Apple
lossless from flac but have acc 128 !!!!


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