[FFmpeg-user] VBR encoding not supported ???

[Moritz Barsnick]

On Mon, Apr 29, 2024 at 18:47:36 +0530, Aditya Dandavate wrote:
> Also, according to `Guidelines for high-quality lossy audio encoding`
> guide, is it true that only E-AC3 is "officially" supported in mp4 ? Does
> this mean that all other audio codecs like Opus, AAC, mp3 are
> illegally/unofficially supported by the container ?

There may be unofficial ones, but your list is not correct.

Wikipedia has a table and references to the ISO standards documents:
https://en.wikipedia.org/wiki/Comparison_of_video_container_formats#Audio_coding_formats_support

E-AC3 is certainly not the only officially supported audio codec.

Moritz