[Libav-user] Id3v2 tag writing in ADTS encoder

[KIM]

Hello.
I’m patching AAC segments of an HLS playlist one by one. Each segment contains a ID3V2 PRIV tag (id3v2_priv.com.apple.streaming.transportStreamTimestamp) which contains the time offset of each segment. I need to both use it and copy it in the output segment I’m encoding.

For the decoding part no problem, I got it. For the encoding part instead I do not understand how I am supposed to set the id2v3tag field of the encoder’s ADTSContext [1], which apparently if set is going to be written in the header. Any help/hint would be greatly appreciated.

Best regards,
Daniel


[1] https://ffmpeg.org/doxygen/4.0/adtsenc_8c_source.html#l00042