[Cin] ac4 and ffmpeg

Andrew Randrianasulu randrianasulu at gmail.com
Tue May 10 20:55:12 CEST 2022


about E-AC3 but company's motives remained mostly same in last 25 years..

it seems Dolby wanted per-decoder license/fee, and got it... with literal
100s of millions of devices.. yeah, guess they can eat something not so

not sure if any of this 3d audio will take off in near future, but at least
hearing some broadcast from 202x might be important.. for historical

On Tuesday, May 10, 2022, Andrew Randrianasulu <randrianasulu at gmail.com>

> Probably not very relevant right now but apparently Dolby pushed their new
> ac4 codec as part of new digital TV standart..
> so.. it might be encountered in new broadcasts.
> ffmpeg decoder was already written, but not in any release or even main
> tree
> see
> https://trac.ffmpeg.org/ticket/8349
> and last comment pointing at recent-ish rebase
> https://github.com/makrsmark/FFmpeg/commits/ac4
> if I understand correctly only mpeg transport stream currently supported
> as container, and not, say, mp4.
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