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    Old Yesterday, 23:44   #241  |  Link
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    Quote:
    Originally Posted by Iron_Mike View Post
    so run a control test on a x265 encode that has custom keyframes w/ open-gop ? seekmode=0 or seekmode=1 ? or what are we looking for here ?
    If that's how you encoded your x265 files, yes, and using whatever seekmode you used in your metric tests. You don't need to test the entire series.

    You should also run a 'self-test' on the source/reference clip though - I assume it was crowd_run_1080p50.y4m.

    Quote:
    Originally Posted by Iron_Mike View Post
    the "first frame" thing is only specific to the crowdrun file, we discussed this a while ago. When I ran extensive VMAF control tests on other files than crowdrun, the score was never 99.999 and it wasn't just the first frame score that threw it off...

    as you know, NF does state that control test score of 98.x are to be expected...
    All I was saying is that VMAF is an exception.
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    Old Today, 00:25   #242  |  Link
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    Quote:
    Originally Posted by WorBry View Post
    If that's how you encoded your x265 files, yes, and using whatever seekmode you used in your metric tests. You don't need to test the entire series.

    You should also run a 'self-test' on the source/reference clip though - I assume it was crowd_run_1080p50.y4m.

    control - crowd_run_1080p50.y4m - seekmode=0 - GMSD/SSIM

    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500


    control - (one example file) x265 CRF 28, preset medium, open-gop, no custom keyframes - seekmode=0 - GMSD/SSIM

    --> this is how I encoded my series of encodes for the preset medium|fast comparison

    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
    stop 0 500
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    Old Today, 00:54   #243  |  Link
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    That's good then.
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    Old Today, 11:05   #244  |  Link
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    Ok here's my idea for testing for frame seeking issues. VSNTSF - VapourSynths Next Top Source Filter

    Download https://www.dropbox.com/s/illkfly7wq...eTEST.rar?dl=1

    Put your video files in test_chamber\video_test_files
    ffms2 & lsmas dlls in test_chamber\ffms2 & test_chamber\lsmas

    Edit the bat file if needed
    Code:
    set start=0
    set end=300
    set tests=ffms2 lsmas lsmasav ffms2seek0
    Result is a csv file (open in excel or similar app)



    Testing only the first 10 frames!



    EDIT:
    - Added LibavSMASHSource() which doesn't create an index, but works only with mp4? (From Avisynth wiki: " Recommended for MP4, MOV, ISO Base Media and its derived file formats.")

    set tests=ffms2 lsmas lsmasav ffms2seek0
    means:
    - ffms2.Source()
    - lsmas.LWLibavSource()
    - lsmas.LibavSMASHSource()
    - ffms2.Source(seekmode=0)
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