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15th April 2024, 19:50 | #1 | Link |
Artem S. Tashkinov
Join Date: Dec 2006
Posts: 393
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Lossless AV1 encoding
SVT-AV1 doesn't support it.
Rav1e neither. libaom-av1 in my own testing (yuv420p10le source, ffmpeg 6.1.1 params: -c:v libaom-av1 -crf 0 -aom-params lossless=1; libaom-3.8.2) produces lossless output only for I (key) frames. How did I verify? Code:
ffmpeg -i input.mp4 -f framemd5 input.txt ffmpeg -i output.mp4 -f framemd5 output.txt Last edited by birdie; 15th April 2024 at 20:01. |
15th April 2024, 21:05 | #2 | Link |
Registered User
Join Date: Jul 2015
Posts: 785
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https://gitlab.com/AOMediaCodec/avm/-/commits/main
av2enc_avx.exe -q 100 -444 -size 280x420 -effort 7 -thread 4 -tune ssim input.png/jxl/tiff/wp2 -d output.av2 avifenc_avm_avx.exe -c avm -l -d 8 -y 444 -r full -s 7 -j 4 input.jpg output.avif Last edited by Jamaika; 15th April 2024 at 21:08. |
24th April 2024, 20:05 | #5 | Link |
Moderator
Join Date: Jan 2006
Location: Portland, OR
Posts: 4,887
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The benefit of interframe encoding for natural image content is a lot smaller for lossless than for lossy. Encoding and decoding are much faster as well.
It's quite common for distribution encoders to not support lossless. As the original reference encoder, I imagine libaom would support it. What's your scenario for lossless interframe AV1 encoding? |
31st July 2024, 21:27 | #6 | Link | |
Registered User
Join Date: Feb 2020
Posts: 552
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Quote:
https://trac.ffmpeg.org/ticket/7600 |
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lossless encoding |
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