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7th September 2021, 20:59 | #521 | Link | |
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Quote:
Code:
ffmpeg -ss 00:00:02 -t 00:00:06 -i c:/raw_1080p30.mkv -pix_fmt yuv420p -f rawvideo - | vvencapp.exe -s 1920x1080 --framerate 30 --threads 2 --preset medium -q 30 -i - --output c:\test.vvc && vvdecapp.exe -b c:\test.vvc -o c:\VVC.yuv && ffmpeg -video_size 1920x1080 -framerate 30 -pix_fmt yuv420p10le -i c:\vvc.yuv -c:v -acodec -vcodec utvideo -color_primaries 1 -color_trc 1 -colorspace 1 c:\final.mkv && del c:\vvc.yuv That's the news!
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7th September 2021, 21:10 | #522 | Link | |
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How the H.266 video standard will help stream content way faster
https://thenextweb.com/news/h266-vvc...ming-standards Quote:
Just Wow. It seems they uses Tencent software decoding [1] [2] within their Apps. And the paper [3] did a test and despite it is still early version 0.01, an Apple A12 used in iPhone XR and XS managed to decode with 30fps. Not sure anyone wants to do that due to battery issues but nevertheless it works. Interesting. [1] https://github.com/TencentCloud/O266player [2] https://multimedia.tencent.com/news/202102011 [3] https://arxiv.org/pdf/2103.03612.pdf
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Previously iwod Last edited by ksec; 7th September 2021 at 21:20. |
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7th September 2021, 21:21 | #523 | Link | |
Lost my old account :(
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Last edited by excellentswordfight; 7th September 2021 at 21:24. |
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8th September 2021, 19:22 | #526 | Link | |
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9th September 2021, 10:05 | #527 | Link | |
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Switching across channels would be a pain otherwise, so you're right. Ah... I see... |
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9th September 2021, 19:50 | #528 | Link | |
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Obviously one can't have more B-frames than frames in the GOP, but these can get pretty complex even in 25 or 30 frames. Are any live encoders using RADL yet? Those should be helpful for fixed GOP durations. |
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9th September 2021, 21:10 | #529 | Link | |
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10th September 2021, 09:28 | #530 | Link | |
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13th September 2021, 01:59 | #531 | Link | |
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Previously iwod Last edited by ksec; 16th September 2021 at 04:33. Reason: Grammar |
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13th September 2021, 17:47 | #533 | Link |
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Yeah, takes years before all the interesting nooks and crannies of a new codec get understood, and how the different parts interact with different kinds of content and use cases.
There's still stuff that HEVC that I seen thoroughly explored and optimized, like adaptive SAO parameters. |
17th September 2021, 16:45 | #534 | Link | ||
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Avisynth Script:
Code:
ColorBars(1920, 1080, pixel_type="YV12") ChangeFPS(23.976) trim(0, 100) VVEnc: Quote:
Quote:
Final decoded result: So it looks as if somewhere it gets converted and it's no longer yuv420p 8bit. What happened? |
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17th September 2021, 20:41 | #536 | Link | |
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Quote:
Code:
ffmpeg -i "AVS Script.avs" -pix_fmt yuv420p -f rawvideo - | vvencapp -s 1920x1080 -r 24 -c yuv420 --internal-bitdepth 8 --preset medium -b 250000 -p 1 -rs 10 -o VVC.266 -i - Code:
vvdecapp -b VVC.266 -o - | ffmpeg -s:v 1920:1080 -framerate 24 -pixel_format yuv420p -f rawvideo -thread_queue_size 64 -i - -c ffvhuff -color_primaries 1 -color_trc 1 -colorspace 1 final.mkv -y |
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18th September 2021, 08:16 | #538 | Link | |
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Quote:
With .yuv you can cut out a snippet very precisely just by skipping and copying blocks of bytes with a fixed size. Like with the Unix tool 'dd'. Cant do that with .y4m. And what does one save by using .y4m ? No need to specify size and fps ? |
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18th September 2021, 10:10 | #540 | Link |
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"So it looks as if somewhere it gets converted and it's no longer yuv420p 8bit."
This is nv21 or nv12, i.e. semi-planar ffplay.exe -video_size 1920x1080 -framerate 24 -pix_fmt nv21 -i file You can also try yuv420p10 and p010le! "y4m is somewhat dated" Heh, we just updated it to support more stuff, i.e. ffmpeg color range extension! See https://code.videolan.org/videolan/x...uests/69/diffs Last edited by Balling; 18th September 2021 at 10:20. |
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