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VideoLAN's dav1d 0.6 Released With More AVX2 + AVX-512 Optimizations

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  • VideoLAN's dav1d 0.6 Released With More AVX2 + AVX-512 Optimizations

    Phoronix: VideoLAN's dav1d 0.6 Released With More AVX2 + AVX-512 Optimizations

    Dav1d 0.6 is now available as a big update to this open-source AV1 video decoder developed by the VideoLAN crew...

    http://www.phoronix.com/scan.php?pag...d-0.6-Released

  • #2
    Nice. What about the original AVX instructions? Does it offer a path for that, or is it AVX2 or SSSE3 only?

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    • #3
      AVX: Just a tiny bit of SSE. You are going to suffer without AVX2.

      My old desktop quad CPU stutters at 480p (VP9 is fine). I wouldn't be surprised if RPi4 is better at this point.
      Last edited by andreano; 03-10-2020, 12:27 PM.

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      • #4
        Originally posted by TemplarGR View Post
        Nice. What about the original AVX instructions? Does it offer a path for that, or is it AVX2 or SSSE3 only?
        AVX is all float instructions, so useless for video coding. Well, AVX also introduces 3-operand SSE, that's useful for video. But that's the only thing.

        Enter AVX2 then, which is all about integer math, so super useful for video coding.

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        • #5
          dav1d works quite well. As long as the device was designed with sufficient cooling(It's a great test of how good a manufacture did at designing their thermal solution.), you can playback most 8bit 30hz or lower 1080p files encoded at the bitrates that youtube uses smoothly, on an Amlogic s922x based system. With this last release 10bit content went from not so great at any resolution to watchable at 720p.

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