[FFmpeg-devel] [PATCH] avformat/ac3dec: detect fairplay encryption

[Sebastian Hubbard]

I knew this was an ABI change and probably wasn't going to be
acceptable, but I decided to share it for consideration anyway.
There's special code in av_probe_input_format3 to skip over id3 tags
for the purposes of format detection, but Apple uses id3 tags to
signal information for HLS audio only tracks. Maybe this change
shouldn't be made, but if it could ever be helpful for another format
prober to know about leading id3 tags this is the only way I could
imagine it.