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  • DJDarrenDJDarren@mendeddrum.org
    Oct 21, 2026, 8:57 AM

    So it turns out that if you're using ffmpeg without actively including hardware acceleration, you're setting yourself up for a bad time. Obvious, I'm sure. But I didn't realise until a few minutes ago that ffmpeg doesn't use the GPU automatically, and that you have to ask it to.

    Just run the conversion on the same video file as before on my work PC with its integrated Intel i3 GPU which converted at 6.4x speed.

    I'm actually blown away.

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Replies

  • DJDarrenDJDarren@mendeddrum.org
    Oct 21, 2026, 8:58 AM

    All this time I've been getting my poor server to convert downloaded videos using the CPU and just accepting that it'll have to ramp up to 100% on all four cores, and I could have been using the (modest, but integrated) GPU.

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  • GaryWiteWulf@cyberplace.social
    Oct 21, 2026, 8:59 AM

    @DJDarren as you alluded to earlier, I believe GPU offloading can lead to a drop in quality, hence it’s not used by default.

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  • GaryWiteWulf@cyberplace.social
    Oct 21, 2026, 9:06 AM

    @DJDarren tbh, I doubt you’ll notice the difference. It’s just the ffmpeg greybeards being hypercritical (in a good way)

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