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2nd March 2020, 01:49 | #2081 | Link | |
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This would be odd since a key point of AV1 is to be able to use lower bitrates than VP9. And as a performance-heavy SW decoder, lower bitrates help performance as well. |
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2nd March 2020, 11:31 | #2082 | Link | |
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But i think that is not true anymore. Have seen more mixed results and av1 was most of the time smaller. Will look, if we can collect data about it once new AV1 encoded videos are available(no new AV1 encoded video since 2020-02-23 in the "Popular Right Now" playlist) Tracker how many AV1 encoded videos are in the "Popular Right Now" playlist per day https://htmlpreview.github.io/?https...er/yt-av1.html Last edited by Toggleton; 2nd March 2020 at 11:38. |
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2nd March 2020, 23:51 | #2084 | Link | ||
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Last edited by foxyshadis; 6th March 2020 at 02:32. Reason: change code to quote to fix forum formatting |
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3rd March 2020, 00:48 | #2085 | Link | |
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As we're getting faster and better encoding, I would expect the AV1 bitrates to drop while maintaining quality. |
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10th March 2020, 22:45 | #2087 | Link | |
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It's be nice to have some benchmarks with details beyond "Up to 2.5x faster" - is that only in some edge cases, or is ~2x speedup a practical expectation? |
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10th March 2020, 23:21 | #2088 | Link |
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The optimizations covered quite a lot of very commonly used functions (MC, Loopfilter, CDEF), so I would expect quite decent improvements for the majority of clips. I believe a proper announcement with example benchmarks is still being worked on.
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LAV Filters - open source ffmpeg based media splitter and decoders |
11th March 2020, 17:27 | #2089 | Link | |
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Probably that's why they didn't announce performance differences from previous versions as they always do. But huge gains for 10 bit video, as they actually begin optimizations for this colour depth for the first time, starting with this version.
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14th March 2020, 00:32 | #2090 | Link |
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I discovered a quirk of aom that might be of interest to some people.
Sometimes keyframes in aom look really bad even in constant quantizer mode and a cq level of 20. Examples: https://slow.pics/c/GaddIUgb I believe this happens when the encoder looks ahead and sees that the keyframe (or parts of the keyframe) is pretty useless because not a lot depends on it. You can fix these low quality keyframes, if you want, with --enable-keyframe-filtering=0. Obviously, this will use more bitrate. Last edited by motbob; 14th March 2020 at 00:39. |
16th March 2020, 22:19 | #2092 | Link |
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AMD's new 7nm zen2 based ryzen 4000 'renoir' laptop chips were announced today, they don't support AV1
image: https://images.anandtech.com/doci/15...e-page-009.jpg |
17th March 2020, 05:07 | #2095 | Link | |
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It seems likely that the Zen3 based Cezanne APU (like 5000 series) will have AV1 decoding blocks, perhaps maybe the new discrete GPU's expected later this year too. |
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17th March 2020, 09:30 | #2096 | Link |
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Media features are typically part of the GPU, not the CPU, as such Zen2 or Zen3 wouldn't make the key difference, but the Vega graphics on them would - which isn't even RDNA yet, so its rather old.
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LAV Filters - open source ffmpeg based media splitter and decoders |
17th March 2020, 12:31 | #2097 | Link |
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Renoir SoC has a special version of Vega at 7nm that has borrowed multimedia engine from Navi aka RDNA.
We have to actually run DXVAChecker to see real features and decoding speed.
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18th March 2020, 18:31 | #2100 | Link |
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new macbook air has been released, it uses a 10th gen intel processor, no info about AV1 decoding or not: https://www.apple.com/uk/macbook-air/specs/
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