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YouTube Begins Rolling Out AV1 Support In Beta

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  • #11
    Originally posted by wswartzendruber View Post
    Why is it only in MP4 and not webm/matroska?

    I think it has to do with MPEG-DASH
    I don't think so. As you say, it's codec agnostic, even though it contains explicit details about the formats that MPEG cares about.

    YouTube has always used DASH exclusively for its VP9 and Opus files in WebM.

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    • #12
      Originally posted by Imroy View Post
      I wonder what encoder they're using. libaomedia-av1 or Rav1e?
      I don't think it makes sense to use Rav1e before it surpasses x264 in quality. For all I know, that might have happened (I'm waiting for the headlines), but it's certainly not where they started: Sacrificing everything for speed.
      Last edited by andreano; 13 September 2018, 01:06 PM.

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      • #13
        The most beautiful news of this year.

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        • #14
          Thanks Youtube! Do that instead of supporting h264 and h265 which I have dedicated silicon to decode and use minimal battery life.

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          • #15
            Originally posted by labyrinth153 View Post
            Thanks Youtube! Do that instead of supporting h264 and h265 which I have dedicated silicon to decode and use minimal battery life.
            By the time youtube defaults to AV1 the software implementation will be optimized and partial or full hardware implementations on gpus will be widespread. And it will be about time to upgrade anyway. So no worries. This is progress.

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            • #16
              I hope so. I highly doubt I will have hardware av1 decode support any time this decade but it might be worth looking in to.

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              • #17
                As long as none of the big browsers have any intentions to support hardware-decoding on linux, the GPU decoders don't matter anyway...
                (Except for the people that put up with the hassle of downloading every video before watching it).
                I'm just sad the old AMD E-350 notebook I use on the side can barely play VP9 720p videos. Before YouTube switched to VP9, 1080p was no problem. (On Windows sometimes even with 60fps if the data-rate was low)

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                • #18
                  Originally posted by labyrinth153 View Post
                  Thanks Youtube! Do that instead of supporting h264 and h265 which I have dedicated silicon to decode and use minimal battery life.
                  They already have everything as h.264, and they also have VP8 and VP9, which also have hardware decoding available. Of course, that doesn't really matter, since most browsers don't support hardware decoding.

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                  • #19
                    Originally posted by elvenbone View Post
                    Before YouTube switched to VP9, 1080p was no problem.
                    You still can make your browser to pretend that it doesn't support vp{8,9} with a plugin, like h264fy for chromium.
                    Then again, I use patched version of chromium to use vaapi decoding, that makes most FHD and 720p60 youtube videos play smooth on my aging e-350 based home server/htpc.

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                    • #20
                      Looks like the range of resolutions is expanding:

                      Code:
                      $ youtube-dl --no-warnings -F "https://www.youtube.com/watch?v=2nXYbGmF3_Q" | grep av.1
                      160          mp4        256x144    144p  109k , avc1.4d400c, 30fps, video only, 1.02MiB
                      133          mp4        426x240    240p  242k , avc1.4d4015, 30fps, video only, 2.26MiB
                      134          mp4        640x360    360p  540k , avc1.4d401e, 30fps, video only, 4.68MiB
                      135          mp4        854x480    480p  992k , avc1.4d401f, 30fps, video only, 8.53MiB
                      136          mp4        1280x720   720p 1667k , avc1.4d401f, 30fps, video only, 14.46MiB
                      137          mp4        1920x1080  1080p 2769k , avc1.640028, 30fps, video only, 23.19MiB
                      18           mp4        640x360    medium , avc1.42001E,  mp4a.40.2@ 96k
                      22           mp4        1280x720   hd720 , avc1.64001F,  mp4a.40.2@192k
                      395          mp4        426x240    240p  410k , av01.0.05M.08, 30fps, video only, 3.24MiB
                      396          mp4        640x360    360p  724k , av01.0.05M.08, 30fps, video only, 5.83MiB
                      397          mp4        854x480    480p 1126k , av01.0.05M.08, 30fps, video only, 9.42MiB
                      398          mp4        1280x720   720p 1985k , av01.0.05M.08, 30fps, video only, 17.99MiB
                      399          mp4        1920x1080  1080p 3541k , av01.0.05M.08, 30fps, video only, 36.84MiB (best)
                      Last edited by anth; 13 September 2018, 07:08 PM.

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