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    Old 19th April 2019, 20:26   #1621  |  Link
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    Quote:
    Originally Posted by nevcairiel View Post
    ffmpeg -benchmark -i file.mp4 -f null -
    Yep that's exactly what I needed, and things are working now!

    ...except that the ffmpeg build I used seems to use the AOMedia AV1 decoder rather than dav1d. So now the question is where are you getting your ffmpeg builds so that they actually use dav1d?
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    Old 19th April 2019, 20:44   #1622  |  Link
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    Quote:
    Originally Posted by Nintendo Maniac 64 View Post
    Yep that's exactly what I needed, and things are working now!

    ...except that the ffmpeg build I used seems to use the AOMedia AV1 decoder rather than dav1d. So now the question is where are you getting your ffmpeg builds so that they actually use dav1d?
    They probably use both, but prefer aom. To use dav1d, try -c:v libdav1d before -i.
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    Old 20th April 2019, 13:14   #1623  |  Link
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    I'd like to solicit opinions on splitting this thread up, especially into aom, rav1e, dav1d, still image (avif) news, as well as solicitations to get the best quality command lines. I'd like to create a separate AV1 forum entirely at this point, but one megathread does not a forum make.
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    Old 20th April 2019, 14:33   #1624  |  Link
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    Quote:
    Originally Posted by benwaggoner View Post
    VMAF isn't a still image metric. Has anyone run a correlation for VMAF against subjective testing for still images?
    Here you go, based on the TID2013 dataset:
    Code:
    Actual profile:
    Spearman:            | Kendall:
    PSNRHA         0.938 | PSNRHA         0.787
    PSNRHMA        0.934 | PSNRHMA        0.777
    PSNRHVS        0.926 | PSNRHVS        0.766
    PSNRHVSM       0.917 | PSNRHVSM       0.749
    FSIMc          0.915 | FSIMc          0.742
    FSIM           0.911 | FSIM           0.736
    WSNR           0.897 | WSNR           0.718
    MSSIM          0.887 | MSSIM          0.697
    VSNR           0.882 | VSNR           0.690
    VMAF_v0.6.1    0.863 | VMAF_v0.6.1    0.675
    VMAF_rb_v0.6.3 0.862 | VMAF_rb_v0.6.3 0.674
    NQM            0.857 | NQM            0.666
    PSNR           0.825 | PSNR           0.624
    VIFP           0.815 | VIFP           0.621
    PSNRc          0.803 | PSNRc          0.596
    SSIM           0.788 | SSIM           0.577
    
    Simple profile:
    Spearman:            | Kendall:
    PSNRHA         0.953 | PSNRHA         0.818
    PSNRHVS        0.951 | PSNRHVS        0.809
    FSIM           0.949 | FSIM           0.795
    FSIMc          0.947 | FSIMc          0.792
    PSNRHVSM       0.938 | PSNRHMA        0.785
    PSNRHMA        0.937 | PSNRHVSM       0.780
    WSNR           0.933 | WSNR           0.772
    PSNR           0.913 | PSNR           0.745
    VSNR           0.912 | VSNR           0.731
    MSSIM          0.905 | MSSIM          0.720
    VIFP           0.897 | VIFP           0.714
    VMAF_rb_v0.6.3 0.891 | VMAF_rb_v0.6.3 0.698
    VMAF_v0.6.1    0.889 | VMAF_v0.6.1    0.696
    PSNRc          0.876 | PSNRc          0.689
    NQM            0.875 | NQM            0.681
    SSIM           0.837 | SSIM           0.628
    
    Full profile:
    Spearman:            | Kendall:
    FSIMc          0.851 | FSIMc          0.666
    PSNRHA         0.819 | PSNRHA         0.643
    PSNRHMA        0.813 | PSNRHMA        0.631
    FSIM           0.801 | FSIM           0.629
    MSSIM          0.787 | MSSIM          0.607
    VMAF_rb_v0.6.3 0.749 | VMAF_rb_v0.6.3 0.564
    VMAF_v0.6.1    0.748 | VMAF_v0.6.1    0.563
    PSNRc          0.687 | VSNR           0.508
    VSNR           0.681 | PSNRHVS        0.507
    PSNRHVS        0.654 | PSNRc          0.496
    PSNR           0.640 | PSNRHVSM       0.481
    SSIM           0.637 | PSNR           0.470
    NQM            0.635 | NQM            0.466
    PSNRHVSM       0.625 | SSIM           0.463
    VIFP           0.608 | VIFP           0.456
    WSNR           0.580 | WSNR           0.446
    All bitmap images have been converted to raw full range YUV444P with ffmpeg and then measured with the vmafossexec program.
    Code:
    ffmpeg.exe -i i01_01_1.bmp -vf "scale=flags=accurate_rnd+bitexact+full_chroma_int+full_chroma_inp,format=yuvj444p" i01_01_1.bmp.yuv
    vmafossexec.exe yuv444p 512 384 reference_images/i01.bmp.yuv distorted_images/i01_01_1.bmp.yuv model/vmaf_v0.6.1.pkl
    vmafossexec.exe yuv444p 512 384 reference_images/i01.bmp.yuv distorted_images/i01_01_1.bmp.yuv model/vmaf_rb_v0.6.3/vmaf_rb_v0.6.3.pkl --ci
    I'm also attaching the raw scores, for completeness sake.

    A note on how to read the numbers:
    from the paper I get the following: a SROCC of 0.95 is considered excellent, 0.90 is good, and 0.85 is barely acceptable.
    Attached Files
    File Type: txt VMAF_v0.6.1.txt (29.2 KB, 0 views)
    File Type: txt VMAF_rb_v0.6.3.txt (29.2 KB, 0 views)

    Last edited by SmilingWolf; 20th April 2019 at 19:09.
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    Old 20th April 2019, 16:32   #1625  |  Link
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    Quote:
    Originally Posted by foxyshadis View Post
    I'd like to solicit opinions on splitting this thread up, especially into aom, rav1e, dav1d, still image (avif) news, as well as solicitations to get the best quality command lines. I'd like to create a separate AV1 forum entirely at this point, but one megathread does not a forum make.
    Seems sensible, I would welcome a couple more threads.
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    Old 20th April 2019, 17:59   #1626  |  Link
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    Quote:
    Originally Posted by foxyshadis View Post
    I'd like to solicit opinions on splitting this thread up, especially into aom, rav1e, dav1d, still image (avif) news, as well as solicitations to get the best quality command lines. I'd like to create a separate AV1 forum entirely at this point, but one megathread does not a forum make.
    Makes sense. Implementations should have separate threads from the main standardization effort and aomenc. AOM/AV1 news, legal discussions, etc. can be separate threads.
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    Old 20th April 2019, 18:31   #1627  |  Link
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    Quote:
    Originally Posted by foxyshadis View Post
    I'd like to solicit opinions on splitting this thread up, especially into aom, rav1e, dav1d, still image (avif) news, as well as solicitations to get the best quality command lines. I'd like to create a separate AV1 forum entirely at this point, but one megathread does not a forum make.
    Too much effort, too many double posts, too much separated information and too much overhead in general.

    Probably a separation of AV1 encoding and AV1 decoding would be more than enough for AV1 codec.
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    Old Yesterday, 13:40   #1628  |  Link
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    Quote:
    Originally Posted by NikosD View Post
    Too much effort, too many double posts, too much separated information and too much overhead in general.
    Agreed. Not busy enough yet. You can come back after a couple of days and still might only have a full page to read.
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    Old Yesterday, 14:42   #1629  |  Link
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    VMAF isn't designed for still images, but they do provide the tools to create your own VMAF for specific use cases (e.g. anime on a phone screen, or video game cobtebt) so it surprises me that no one has taken the framework and applied it to still images yet.

    It should in theory be able to fuse the results of those other still image tests and create something even better aligned with human reported scores than any one alone. Presumably not Netflix's main use case but you'd think they deliver enough still images to make it worthwhile since they already have the skills.
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    Old Yesterday, 15:04   #1630  |  Link
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    Quote:
    Originally Posted by dapperdan View Post
    VMAF isn't designed for still images, but they do provide the tools to create your own VMAF for specific use cases (e.g. anime on a phone screen, or video game cobtebt) so it surprises me that no one has taken the framework and applied it to still images yet.

    It should in theory be able to fuse the results of those other still image tests and create something even better aligned with human reported scores than any one alone. Presumably not Netflix's main use case but you'd think they deliver enough still images to make it worthwhile since they already have the skills.
    I was looking into this very matter earlier today and the main problem is, as always for this kind of problems, the lack of high quality MOS datasets. In particular, the only "extensive" dataset I've found is TID2013, and even that only comprises of 2 kinds of image compression distortions, for 25 images, at 5 intensities = 250 distorted images and relative scores.

    When calculating the SROCC for only the "compression" distortions (JPEG and J2K) these are the results:
    Code:
    --- top 33%
    PSNRHA          0.9686
    DSSIM          -0.9683
    PSNRHVS         0.9677
    PSNRHMA         0.9651
    PSNRHVSM        0.9603
    FSIMc           0.9589
    FSIM            0.9580
    VMAF_rb_v0.6.3  0.9524
    SSIMULACRA     -0.9519
    VMAF_v0.6.1     0.9505
    WSNR            0.9468
    --- middle
    MSSIM           0.9427
    VIFP            0.9380
    --- low 33%
    PSNRc           0.9200
    CQM             0.9190
    PSNR            0.9170
    VSNR            0.9162
    SSIM            0.9147
    NQM             0.9023
    I also tweeted to Jon Sneyers about the dataset they used to validate SSIMULACRA, will see if he can release it indipendently of a blogpost that now, after two years, is probably not going to happen.
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