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    Home»Equipment»FFmpeg just made one obscure filter 100x faster using ancient coding tricks most developers have abandoned
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    FFmpeg just made one obscure filter 100x faster using ancient coding tricks most developers have abandoned

    spicycreatortips_18q76aBy spicycreatortips_18q76aJuly 23, 2025No Comments3 Mins Read
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    FFmpeg
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    • FFmpeg’s largest speedup but impacts just one perform few folks can have heard of
    • Handwritten Meeting makes a comeback in a distinct segment filter that almost all customers won’t ever even contact
    • AVX512 offers FFmpeg an absurd 100x acquire – however provided that your CPU helps it

    The FFmpeg challenge, recognized for powering a few of the most generally used video enhancing software program and media instruments, is making headlines once more.

    Builders declare to have achieved what they name “the most important speedup to date,” delivering a 100x efficiency acquire in a current replace.

    The catch? It solely applies to a single, obscure perform, and the technique of attaining it’s elevating eyebrows – handwritten Meeting code, a way largely seen as outdated by most of in the present day’s builders.


    It’s possible you’ll like

    Meeting coding sparks each nostalgia and skepticism

    Meeting language, as soon as important for getting probably the most out of restricted {hardware} within the Nineteen Eighties and Nineteen Nineties, has develop into a distinct segment follow.

    But FFmpeg builders proceed to depend on it for excessive optimization, calling themselves “meeting evangelists.”

    Of their newest patch, they rewrote a filter known as rangedetect8_avx512 utilizing AVX512 directions, a part of a contemporary SIMD (Single Instruction, A number of Knowledge) toolkit that helps CPUs carry out a number of duties in parallel.

    On programs with out AVX512 help, the AVX2 variant nonetheless delivers a 65.63% enchancment.

    Signal as much as the TechRadar Professional e-newsletter to get all the highest information, opinion, options and steerage your corporation must succeed!

    Because the group factors out, “It’s a single perform that’s now 100x sooner, not the entire of FFmpeg.”

    This information follows the same enhance reported in November 2024, the place one other patch introduced sure operations as much as 94x sooner.

    In that case, a part of the sooner efficiency hole stemmed from mismatched filter complexity: the generic C model used an 8-tap convolution, whereas the SIMD model used a less complicated 6-tap method.

    Even compiling the C model in launch mode with a greater compiler like Clang might shut over 50% of the hole, suggesting that a few of the claimed velocity features might have been exaggerated by evaluating worst-case with best-case situations.

    “Register allocator sucks on compilers,” the devs quipped on social media, highlighting compiler inefficiencies.

    Regardless of the caveats, this renewed give attention to low-level coding has sparked recent conversations round efficiency optimization.

    FFmpeg powers every part from VLC Media Participant to numerous YouTube downloader instruments, so even small enhancements in remoted filters can ripple by means of extensively used software program.

    Nonetheless, it’s price noting that such outcomes are sometimes tough to copy and apply throughout broader components of the codebase.

    Whereas these sorts of deep optimizations are spectacular, they might not replicate real-world enhancements for on a regular basis customers enhancing footage with video enhancing software program.

    Except different core features obtain comparable therapy, the promise of a sooner FFmpeg would possibly stay restricted to technical benchmarks.

    Through TomsHardware

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    100x abandoned ancient coding Developers faster FFmpeg Filter obscure tricks
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