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16th March 2021, 17:21 | #61 | Link |
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Has something happened to SVT-AV1? There hasn't been any feature/bugfix update in the months before the move to GitLab, and still nothing since.
See https://www.reddit.com/r/AV1/comment...t_in_almost_a/
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LG C2 OLED | GitHub Projects Last edited by quietvoid; 22nd March 2021 at 01:16. |
26th March 2021, 01:45 | #64 | Link |
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SVT HEVC and VP9 already fell off into minimal maintenance a year ago, so it's probably not that surprising. Intel is probably redirecting resources; all of the prolific contributors are Intel employees or adjuncts, and I haven't seen any Google employees step in to fill the void. I hope it's not a "not now, I'm too busy designing my own language to rewrite the application in first" that's all too prevalent at Google.
Last edited by foxyshadis; 26th March 2021 at 11:39. |
26th March 2021, 01:57 | #65 | Link |
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I was under the impression that Netflix also participated in the development, maybe that changed.
Still hopeful for either SVT-AV1 or rav1e to become good encoders. Especially now that there are some good GSoC 2021 project ideas aimed at improving rav1e.
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26th March 2021, 13:52 | #66 | Link |
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For sure, Netflix and other companies do contribute, and so has Google... but 90% of the last few years of SVT maintenance has come from Intel. I'm crossing my fingers that the it's a momentary blip and going to pick up again, given how long it took x265 to recover after its initial dream team left.
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9th May 2021, 07:21 | #67 | Link | |
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https://gitlab.com/AOMediaCodec/SVT-...eleases/v0.8.7
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2nd December 2021, 08:32 | #69 | Link |
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Looks like 0.8.8 RC1 is tagged with the new optimized speed presets folks have been talking about
https://gitlab.com/AOMediaCodec/SVT-...tree/0.8.8-rc1 Exciting. I'll have to figure out how to get that cooking in media-autobuild-suite... or maybe wait for it to be merged to master. I have to see the whole "faster and better quality than x264 placebo even at the fastest svt-av1 setting" thing for myself to believe it
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2nd December 2021, 11:03 | #70 | Link |
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Okay, wow.
I just went ahead and did my own docker build instead of waiting for this to get merged to master. The new default speed preset is 12, which is indeed about as fast as x264 placebo for me on my Ryzen 9 5900x using a 1080p 8 bit version of the Netflix foreman test clip. I found that using crf 40 in svt-av1 with a 240 frame GOP produced an ABR of ~970 Kbps, and crf 33 in x264 produced an ABR of ~ 955 Kbps. The AV1 version was _dramatically_ better, even if it did suffer a bit in temporal coherency in certain cases. Overall, the x264 version was more consistent, but overall consistently much worse. Both were soft in high frequency details, but the AV1 version completely dominated the x264 version, both in still frame and in-motion comparison. In a totally non-scientific quick little single blind comparison my video literate girlfriend said that on a scale of 1-5 the AV1 version scored a 4 and the x264 version scored a 2, and I have to say I think she's spot on. Again, this was at the same encoding speed. Wow. SVT-AV1 has come a LONG way. Here's a Docker image if you want to use it: https://hub.docker.com/repository/do...vt-av1/general And here's some test encodes: https://d1bl6f264cdx5.cloudfront.net...40_speed12.mp4 https://d1bl6f264cdx5.cloudfront.net...33_placebo.mp4 x264: svt-av1:
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2nd December 2021, 16:29 | #71 | Link |
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Going by your image comparison, If I had to choose between watching x264 or svt-av1, I'd pass on watching either, because both look absolutely horrendous. And how does av1 look better here? It just has different types of artefacts. Where it cannot retain detail it blurs. And it has some major artefacts around the head. Just preblur the source, and x264 probably comes out ahead. And with higher device compatibility too.
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2nd December 2021, 18:40 | #72 | Link |
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That’s not really the point. This is sub 1 Mbps 1080p it’s not something most people on doom9 care about.
The artifacts in motion are way less distracting. It’s just very impressive to see what can be done with an AV1 bitstream using the same amount of compute as x264. This demonstrates very clever optimization and lots of smart early exits. It’s the “superfast” of SVT-AV1
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2nd December 2021, 18:44 | #73 | Link |
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Any link to it? Hard to tell what is what without source.
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3rd December 2021, 00:38 | #75 | Link | |
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Quote:
While we mainly talk about new codecs in terms of potential bitrate reductions at constant quality, quality @ perf is also really important. In general a new codec should be able to provide at least somewhat better quality at the same perf as the prior generation. |
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3rd December 2021, 02:53 | #76 | Link |
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This doesn't look like that canonical "Foreman".
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4th December 2021, 03:23 | #77 | Link |
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Ah yeah it's the newer one that Elemental (not netflix, sorry lol) put together and offered up in 4k for free awhile back. Sadly since they were acquired by AWS their old website is gone, so I'm not sure if these clips are available anymore
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5th January 2022, 11:04 | #78 | Link |
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Looks like rate control is still pretty terrible. I did a 2 pass VBR encode on the slowest preset targeting 1 Mbps for a ~1000 frame clip and it ended up hitting an average bitrate of like 640 Kbps and looked quite bad :|
So... that's a work in progress I guess!
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11th January 2022, 03:36 | #79 | Link |
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I continue to be impressed by this encoder. My favorite animated 1080p24 test clip encoded at 8.5 fps on my Ryzen 9 5900x using preset 4. This is actually a bit faster than CRF 36 x265 on preset slower (both producing similar data rates, approx 1 Mbps). The resulting file from svt-av1 had better min and harmonic mean VMAF scores by several points and avoided moving artifacts that were quite distracting on the x265 version.
This is by no means comprehensive, but outperforming x265 slower while running faster is a significant accomplishment. Granted.. this is with CRF. Per my last post, rate control is still hilariously bad, at least in my test clip (which I think is a very realistic rate control test).
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22nd January 2022, 09:15 | #80 | Link | |
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v0.9.0 Release
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