[Libav-user] Convert mp4 to audio

[Sam Verschueren]

Hi devs

I am working on an application that converts an mp4 file to an audio file.
I want it to be converted to an mp3 file.

At github I found this code: https://github.com/cpawelzik/libcpxvta and it
works well, but only for ogg files. If I change the target format to mp3,
it hangs at the avcodec_encode_audio2(). So the log line
before avcodec_encode_audio2() is printed, but the log line after that is
not printed. Anyone has an idea on why this is the case?

Thanks in advance!
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