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23rd October 2018, 10:28 | #1161 | Link |
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Mozilla released today Firefox 63
Firefox 63 adds an AV1 decoder (it's disabled by default). To try AV1:
Last edited by marcomsousa; 23rd October 2018 at 10:53. |
23rd October 2018, 11:51 | #1162 | Link |
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Firefox 64 Beta is out, which i think enables AV1 by default.
UPDATE: I don't think it is enabled by default, this video won't play: http://video.1ko.ch/codec-comparison...18-06_550.webm Last edited by hajj_3; 23rd October 2018 at 18:19. |
23rd October 2018, 14:10 | #1163 | Link | |
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https://www.bunkus.org/blog/
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Last edited by Pushman; 23rd October 2018 at 14:17. |
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23rd October 2018, 14:18 | #1164 | Link | ||
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24th October 2018, 12:25 | #1165 | Link |
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Hi everyone, I'm trying to understand how to obtain the better quality/speed/size for FHD/3 (aka 360p or, more precisely, 640x*) resolution videos @ 1 Mbps.
Since AV1 (but other codecs too) supports multiple bitdepth do you suggest to use 12 ? About chroma: choosing 444 instead of 420 could help to obtain better quality ? Thanks in advice for anyone can help. Last edited by PatchWorKs; 24th October 2018 at 12:31. |
24th October 2018, 15:52 | #1166 | Link |
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Apply moderate De-grain, De-noise, Sharpen and more would help the visual quality. Some encode enhancer have friendly GUI to work around if you have video card.
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24th October 2018, 17:14 | #1167 | Link | |
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I use firefox 63 and I have enabled media.av1.enabled |
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24th October 2018, 17:54 | #1168 | Link | ||
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Also, VBR 1 Mbps at 640x360 isn’t a very challenging bitrate; H.264 can do quite well for lots of content at that bitrate, and HEVC can do well at significantly lower. Heck, I could do a nice WMV VC-1 in those constraints a decade ago. Doing encoding tuning at a bitrate where things look good is a lot harder since subtle improvements or degradations might not be visible. Using a bitrate where it’s never going to look great makes the impact of changes more visible and more meaningful. Making mediocre quality significantly better is where differences in encoders really matter. FWIW. I’m able to get mediocre 1920x800 out of HEVC at 1 Mbps. That’s 1/9th the bits per pixel as 1 Mbps at 640x360. An “interesting” bitrate to compare 640x360 natural image content at would be more in the 200-500 Kbps range for VBR. If you’re doing a constant bitrate encode, higher can make sense. I’m not sure how accurate CBR rate control is in AV1, though. VP3-9 weren’t ever any good at VBV compliance. Sent from my iPad using Tapatalk |
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24th October 2018, 18:54 | #1170 | Link |
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Works for me. Sad thing is: the uploaded videos are uploaded in inferior formats so far. Re-coding into AV1 doesn't make them better. The first video I watched had color banding. But no DCT artifacts.
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25th October 2018, 08:11 | #1172 | Link | ||||
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Anyway source is AVC 264 FHD 8bits 4:2:0 Quote:
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Anyway I'll try @ 750Kbps to understand if it's possible to obtain acceptable results. Quote:
Here's the FFMPEG commandline I've used to test VP9: Code:
ffmpeg.exe -y -hwaccel auto -i "<source_filename>" -c:v libvpx-vp9 -pix_fmt yuv444p12le -cpu-used 5 -r 30 -g 90 -quality realtime -speed 7 -threads 4 -row-mt 1 -tile-columns 1 -frame-parallel 0 -qmin 4 -qmax 48 -b:v 1M -maxrate 1M -bufsize 1M -sws_flags lanczos -vf "crop=<parm>,scale=iw/3:ih/3" -sn -an -f webm "<output>_VP9.webm" Last edited by PatchWorKs; 25th October 2018 at 12:15. |
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28th October 2018, 13:44 | #1173 | Link | |
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the past ~2 weeks libaom has been producing files for me it can't decode any more, a few frames into the stream it dies and never recovers
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Is that happening to everyone else or did i find a rare bug in my build proccess or encoder settings? |
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28th October 2018, 14:52 | #1174 | Link | |
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29th October 2018, 08:41 | #1175 | Link | |
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So far I have reached the conclusion it happens (but not always!) when forcing the encoder to use columns with the width of 2 superblocks (128 pixels). Doesn't happen when the columns have a width of 256 pixels or more on the same file with all the other settings being the same. I have been doing single threaded encodes for weeks because of this. Last edited by SmilingWolf; 29th October 2018 at 09:08. |
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29th October 2018, 10:59 | #1176 | Link |
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MPC-BE beta 1.5.3 v4106 has been released which supports AV1: https://sourceforge.net/projects/mpc...r.zip/download
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29th October 2018, 18:48 | #1178 | Link | |
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You might want to try some kind of blind test, though. You shouldn’t see more color or more contrast with more samples. You might see sharper edges between areas of strong color. For example, with ClearType text, which plays all sorts of RGB 444 subpixel tricks that don’t translate well to even other LCD panels, let along different color spaces. (Pro tip for doing screen recording; disable chroma subpixel rendering for text. Otherwise it can look unpredictably funky on different displays). |
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30th October 2018, 21:30 | #1179 | Link |
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1. With Rav1e anyone know what type -r Reconstruction takes (Boolean, String, Int, etc...) and what it actually does. I can not find any info on it and the help menu is blank for that option.
2. This has been likely asked a dozen times over, Whats the main reason why aomenc is slower compared to other encoders out there? I'm just starting to research AV1. |
30th October 2018, 22:56 | #1180 | Link | |
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Last edited by marcomsousa; 31st October 2018 at 10:10. |
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