[Libav-user] libavformat: How to convert AAC audio packets to ADTS format

[Malik Jahanzeb]

I am trying to write a C program that demuxes audio from an MP4 file and
write demuxed AVPacket data to a file. But the resulting dump is missing
ADTS headers. Any pointers on what is the best way to add ADTS headers.

I see that ffmpeg has 'adtsenc.c' file that seems to implement an ADTS
muxer:

AVOutputFormat ff_adts_muxer = {
    .name              = "adts",
    .long_name         = NULL_IF_CONFIG_SMALL("ADTS AAC (Advanced
Audio Coding)"),
    .mime_type         = "audio/aac",
    .extensions        = "aac,adts",
    .priv_data_size    = sizeof(ADTSContext),
    .audio_codec       = AV_CODEC_ID_AAC,
    .video_codec       = AV_CODEC_ID_NONE,
    .write_header      = adts_write_header,
    .write_packet      = adts_write_packet,
    .write_trailer     = adts_write_trailer,
    .priv_class        = &adts_muxer_class,
    .flags             = AVFMT_NOTIMESTAMPS,
};

Can I use this muxer for my purpose? If yes, any links on how to use it?

Thanks in advance,

Malik
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