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

[Carl Eugen Hoyos]

Am Mi., 4. März 2020 um 17:53 Uhr schrieb Sebastian Hubbard
<sebh-at-google.com at ffmpeg.org>:
>
> 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.

If the additional fields are necessary (I don't know), they could be
added to the end of the struct where they do not break abi.

Carl Eugen