I'm trying to generate MP4 files containing audio from various files, such as
MP3, WAV, OGG, but I'm having some troubles (I'm also putting video in there,
but for simplicity's sake I'm omitting that for this question, since I've got
that working). My current code opens an audio file, decodes the content and
converts it into the MP4 container and finally writes it into the destination
file as interleaved frames.It works perfectly for most MP3 files, but when
inputting WAV or OGG, the audio in the resulting MP4 is slightly distorted and
often plays at the wrong speed (up to many times faster or slower).I've looked
at countless of examples of using the converting functions (swr_convert), but I
can't seem to get rid of the noise in the exported audio.
Code (for decoding, converting and encoding): http://pastebin.com/ENzeaHpU
I have also tried setting appropriate pts values for outgoing frames, but that
doesn't seem to affect the sound quality at all.I'm also unsure how/if I should
be allocating the converted data, can av_samples_alloc be used for this? What
about avcodec_fill_audio_frame? Am I on the right track?
/David
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