<div dir="ltr"><p style="margin:0px 0px 1em;padding:0px;border:0px;font-size:15px;clear:both;color:rgb(36,39,41);font-family:arial,"helvetica neue",helvetica,sans-serif">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.</p><p style="margin:0px 0px 1em;padding:0px;border:0px;font-size:15px;clear:both;color:rgb(36,39,41);font-family:arial,"helvetica neue",helvetica,sans-serif">I see that ffmpeg has 'adtsenc.c' file that seems to implement an ADTS muxer:</p><pre style="margin-top:0px;margin-bottom:1em;padding:5px;border:0px;font-size:13px;width:auto;max-height:600px;overflow:auto;font-family:consolas,menlo,monaco,"lucida console","liberation mono","dejavu sans mono","bitstream vera sans mono","courier new",monospace,sans-serif;background-color:rgb(239,240,241);word-wrap:normal;color:rgb(36,39,41)"><code style="margin:0px;padding:0px;border:0px;font-family:consolas,menlo,monaco,"lucida console","liberation mono","dejavu sans mono","bitstream vera sans mono","courier new",monospace,sans-serif;white-space:inherit">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,
};</code></pre><p style="margin:0px 0px 1em;padding:0px;border:0px;clear:both"><font color="#242729" face="arial, helvetica neue, helvetica, sans-serif"><span style="font-size:15px">Can I use this muxer for my purpose? If yes, any links on how to use it?</span></font></p><p style="margin:0px 0px 1em;padding:0px;border:0px;clear:both"><font color="#242729" face="arial, helvetica neue, helvetica, sans-serif"><span style="font-size:15px">Thanks in advance,</span></font></p><p style="margin:0px 0px 1em;padding:0px;border:0px;clear:both"><font color="#242729" face="arial, helvetica neue, helvetica, sans-serif"><span style="font-size:15px">Malik</span></font></p></div>