[FFmpeg-devel] [PATCH] avformat/mp3dec: Workaround mp3 detection failure (PR #20212)

[Zhao Zhili]

> On Aug 11, 2025, at 17:51, Nicolas George <george at nsup.org> wrote:
> 
> Zhao Zhili (HE12025-08-11):
>> Any suggestions?
> 
> “Recognize files …ing with … as MP3 with score …”
> 
>>> What other software manages to recognize these files as valid?
>> ffplay -f mp3 works as expected.
> 
> ffplay is not other software, and it cannot be said to recognize the
> file if you have to specify “-f mp3”.

Commit has been updated as:

avformat/mp3dec: Recognize files start with LAME3.100 as mp3

A set of files begins with the following byte sequence.

00000000 4c 41 4d 45 33 2e 31 30 30 aa aa aa aa aa aa aa |LAME3.100.......|
00000010 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
*

It seems they are encoded with lame, but missing header bytes at the
beginning. Chrome recognize these files as valid.


> 
> Regards,
> 
> -- 
>  Nicolas George
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