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9th November 2019, 16:59 | #22 | Link |
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SVT-AV1 2 pass still doesn't work properly with a higher target bitrate. I set -tbr for 10 mbps and the resulting encode is only 4-5 mbps.
Both -rc 2 (4.6 mbps) and -rc 3 (3.8 mbps). Last edited by quietvoid; 9th November 2019 at 17:16. |
10th November 2019, 02:51 | #24 | Link |
Derek Prestegard IRL
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I get some really bad dealbreaker artifacts at high bitrates using fast presets though. For example, my smoke test at QP 30 with enc-mode 8 through 5 has really bad glitches in certain parts of the frame. These should not be happening at 12 Mbps
They clear up at enc-mode 4 https://imgur.com/a/46Oeofq Last edited by Blue_MiSfit; 10th November 2019 at 03:37. |
10th November 2019, 17:58 | #25 | Link | |||
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Quote:
Trimmed 500 frames of a BT.709 1080p 8-bit SDR clip, ran these two lines: Quote:
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13th November 2019, 05:54 | #26 | Link |
Derek Prestegard IRL
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Maybe some weird edge case with y4m input? I've been doing my tests with raw yuv.
Try this exact 2 pass command (my documentation PR just got merged ) https://github.com/OpenVisualCloud/S...-command-lines |
13th November 2019, 14:54 | #27 | Link |
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2 pass will only work for me if I specify the number of frames to encode (-n). Otherwise 1st pass works fine but 2nd pass freezes at first frame. But I've noticed I've had the following error several times : "Error in freed returnVal 0"
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13th November 2019, 16:27 | #28 | Link | ||
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Quote:
I've tried again with the example CLI and it behaves the same. I'll just give up, I don't think it's implemented properly yet. I had asked 4 months ago on another site and got this response: Quote:
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13th November 2019, 22:49 | #30 | Link |
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Yes, using -q does change the bitrate. It's only -tbr not reaching the target bitrate.
The sample isn't special, I've tried with 24 frames scenes, 500 frames of one scene and multiple samples. I'm sure I could reproduce it with Tears of Steel but I'll wait for a couple PRs to be merged first (including the kbps one ) -tbr has never worked for me, 2 pass still hasn't changed that. Last edited by quietvoid; 13th November 2019 at 22:54. |
25th November 2019, 18:32 | #31 | Link |
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Ryzen 3950X is very fast on SVT-AV1, no doubt about it, it's even faster than latest HEDT from Intel Core i9-10980XE which has 2 more cores, BUT Threadripper's devastating performance is simply out of this world.
It's three times faster than previous Threadripper 32C and two times faster than latest Intel 18C
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Win 10 x64 (19042.572) - Core i5-2400 - Radeon RX 470 (20.10.1) HEVC decoding benchmarks H.264 DXVA Benchmarks for all Last edited by NikosD; 25th November 2019 at 18:34. |
26th November 2019, 11:42 | #33 | Link |
Artem S. Tashkinov
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SVT-AV1 0.75 is out with a long list of changes.
I've compared it to x265 at a similar bitrate and x265 came up on top - a lot more details were generally preserved and SVT-AV1 output is kinda blurry/too smooth. Code:
ffmpeg -i source.mkv -vf fps=30 -an -c:a copy -c:v libx265 -preset veryslow \ -x265-params keyint=600:min-keyint=30:bframes=16:crf=20:no-sao=1 265.mkv ffmpeg -hide_banner -loglevel panic -nostats -i source.mkv -nostdin -f rawvideo -pix_fmt yuv420p - \ | ./SvtAv1EncApp -i stdin -w 1280 -h 720 -n 25038 -b out.av1 -enc-mode 1 -q 24 -rc 0 -intra-period 250 Maybe there are flags to retain details better but I didn't find them. enc-mode 0 is even slower and basically impossible to use. Last edited by birdie; 26th November 2019 at 12:06. |
3rd December 2019, 04:03 | #35 | Link |
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I'm actually more shocked to see a performance graph that actually uses an FPS metric than anything. I got frustrated and stopped looking at such charts because they always had useless, or obscure metrics that involve extra math to find out what the performance is; and that's on top of them not even telling you the encode settings or other critical information
Someone should ask Toms what the hell "1080p encoder mode 4 to AV1 encode" even means and if they speak english. |
18th January 2020, 04:31 | #36 | Link | |
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Version 0.8.0, still getting final bitrates way off of the target I set.
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18th January 2020, 10:14 | #37 | Link |
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Running Linux, tested by Phoronix.
https://i.postimg.cc/nL6c7W9H/svt-av1-39xx-9900.png
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29th January 2020, 21:11 | #38 | Link |
ангел смерти
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SVT-AV1 0.8.1 has been released. Mostly a bugfix release, plus 10-bit palette support for screen coding.
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23rd February 2020, 15:07 | #39 | Link |
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Does anyone know how the SVT-AV1 Gui does 2pass?
2 times the same speed or first pass at speed 8? |
24th February 2020, 07:19 | #40 | Link | |
ангел смерти
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