#11408: loudnorm performance improvement
-------------------------------------+-------------------------------------
Reporter: guillaumekh | Owner: (none)
Type: enhancement | Status: new
Priority: minor | Component: avfilter
Version: git-master | Resolution:
Keywords: loudnorm | Blocked By:
loudness performance ebur128 |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Description changed by guillaumekh:
Old description:
> **Summary of the bug:**
>
> The loudnorm audio filter is slow.
>
> On my M2 Max MacBook Pro running FFmpeg 7.1, it typically reaches 25-35x
> speed.
>
> Some other ITU1770 implementations manage better throughput. I’m
> currently aware of the following implementations :
> - [https://github.com/jiixyj/libebur128 libebur128] (C library) : similar
> to FFmpeg's loudnorm
> - [https://github.com/sdroege/ebur128 ebur128] (Rust port of libebur128):
> reportedly only moderately faster than libebur128
> [https://github.com/jiixyj/libebur128/issues/122#issuecomment-1145974074
> according to authors]
> - [http://pbelkner.de/projects/web/bs1770gain/ bs1770gain]: ≈100x faster
> than realtime
> - Adobe Audition: takes the crown, at ≈275x faster than realtime
>
> How to reproduce:
> {{{
> % ffmpeg -i sometestaudiofile -vn -af loudnorm -f null /dev/null
> }}}
>
> Patches should be submitted to the ffmpeg-devel mailing list and not this
> bug tracker.
New description:
**Summary of the bug:**
The loudnorm audio filter is slow.
On my M2 Max MacBook Pro running FFmpeg 7.1, it typically reaches 25-35x
speed.
Some other ITU1770 implementations manage better throughput. I’m currently
aware of the following implementations:
- [https://github.com/jiixyj/libebur128 libebur128] (C library): similar
to FFmpeg's loudnorm
- [https://github.com/sdroege/ebur128 ebur128] (Rust port of libebur128):
reportedly only moderately faster than libebur128
[https://github.com/jiixyj/libebur128/issues/122#issuecomment-1145974074
according to authors]
- [http://pbelkner.de/projects/web/bs1770gain/ bs1770gain]: ≈100x faster
than realtime
- Adobe Audition: takes the crown, at ≈275x faster than realtime
How to reproduce:
{{{
% ffmpeg -i sometestaudiofile -vn -af loudnorm -f null /dev/null
}}}
Patches should be submitted to the ffmpeg-devel mailing list and not this
bug tracker.
--
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11408#comment:1>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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