On Thu, 12 Jun 2025 16:49:34 +0200 Guillaume Khayat <gkha...@spectre-music.com> wrote: > Hello, > > The small company I work at uses ebur128 filter. > > I’m offering a bounty to improve the filter’s performance on x86 machines. > > I’m offering 800 EUR per 10% gain from current baseline, up to 50%/4000 EUR. > > I’m aware of 2 recent, promising initiatives to improve performance: > - our own incomplete attempt using SIMD instructions (-17%): > https://ffmpeg.org/pipermail/ffmpeg-devel/2025-April/342383.html > - Paul Mahol’s recent work in his fork (-20-25%) > > Notes: > - Solution should of course remain EBU R128 compliant (see EBU Loudness Test > Set [1], EBU 3341 [2] and EBU 3342 [3] specs) > - Solution can use FMA, AVX, AVX2 but not AVX512. > - Evaluation should be done w/ true peak detection disabled (e.g. "ffmpeg -i > ~/test.wav -af ebur128=peak=none:framelog=quiet -f null -“) > - I can offer a down payment at start of work of 800 EUR as a gesture of good > will. Rest of payment on patch merge into ffmpeg + invoice > > I tried doing this myself but I lack the skills and proper time to learn them > on the job. Always happy to sponsor some OSS work though!
Hi, I'm happy to take a look at this. To be clear, you are fine with me taking your existing SIMD code as a starting point? Out of curiousity, did you try the "loudnorm" filter as well? > > Best, > > Guillaume > > [1]: https://tech.ebu.ch/publications/ebu_loudness_test_set > [2]: https://tech.ebu.ch/files/live/sites/tech/files/shared/tech/tech3341.pdf > [3]: https://tech.ebu.ch/files/live/sites/tech/files/shared/tech/tech3342.pdf > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
