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  • avformat/f_select : add support for more pixel formats for scene change score calculations

    21 juillet 2019, par Limin Wang
    avformat/f_select : add support for more pixel formats for scene change score calculations

    This avoids automatic conversions to rgb if scene change score is used in the expression.
    

    Below is the tested results for the new added pixel format without autoscale to rgb24 :
    
1. AV_PIX_FMT_YUVJ420P
    
time ./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f lavfi \
    
"sws_flags=+accurate_rnd+bitexact ;movie=../fate-suite/svq3/Vertical400kbit.sorenson3.mov,select=gt(scene\,.25)"
    

    master :
    
pkt_pts=1620|tag:lavfi.scene_score=1.000000
    
pkt_pts=4140|tag:lavfi.scene_score=0.875036
    
pkt_pts=5800|tag:lavfi.scene_score=1.000000
    
pkt_pts=6720|tag:lavfi.scene_score=0.461625
    
pkt_pts=8160|tag:lavfi.scene_score=1.000000
    
pkt_pts=9760|tag:lavfi.scene_score=1.000000
    
pkt_pts=14080|tag:lavfi.scene_score=0.838916
    
pkt_pts=15700|tag:lavfi.scene_score=1.000000
    
pkt_pts=18500|tag:lavfi.scene_score=0.474948
    
pkt_pts=20040|tag:lavfi.scene_score=0.379700
    
pkt_pts=21760|tag:lavfi.scene_score=1.000000
    
./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f  0.71s user 0.01s system 99% cpu 0.721 total
    

    patch applied :
    
pkt_pts=1620|tag:lavfi.scene_score=1.000000
    
pkt_pts=4140|tag:lavfi.scene_score=0.668643
    
pkt_pts=5800|tag:lavfi.scene_score=0.996721
    
pkt_pts=6720|tag:lavfi.scene_score=0.357390
    
pkt_pts=8160|tag:lavfi.scene_score=0.886268
    
pkt_pts=9760|tag:lavfi.scene_score=0.926219
    
pkt_pts=14080|tag:lavfi.scene_score=0.650033
    
pkt_pts=15700|tag:lavfi.scene_score=1.000000
    
pkt_pts=18500|tag:lavfi.scene_score=0.316402
    
pkt_pts=20040|tag:lavfi.scene_score=0.269509
    
pkt_pts=21760|tag:lavfi.scene_score=1.000000
    
./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f  0.19s user 0.01s system 81% cpu 0.240 total
    

    2. AV_PIX_FMT_YUV420P
    
time ./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f lavfi \
    
"sws_flags=+accurate_rnd+bitexact ;movie=../Passengers_Breakfast_1080-sdr.mkv,select=gt(scene\,.2)"
    
master :
    
pkt_pts=3587|tag:lavfi.scene_score=0.462364
    
pkt_pts=4838|tag:lavfi.scene_score=0.419519
    
pkt_pts=6548|tag:lavfi.scene_score=0.397027
    
pkt_pts=9968|tag:lavfi.scene_score=0.419245
    
pkt_pts=12471|tag:lavfi.scene_score=0.413084
    
pkt_pts=16225|tag:lavfi.scene_score=0.506370
    
pkt_pts=19645|tag:lavfi.scene_score=0.507538
    
pkt_pts=22314|tag:lavfi.scene_score=0.504319
    
pkt_pts=24817|tag:lavfi.scene_score=0.417544
    
pkt_pts=25651|tag:lavfi.scene_score=0.413916
    
pkt_pts=26652|tag:lavfi.scene_score=0.487707
    
18.58s user 0.07s system 99% cpu 18.663 total
    

    patch applied :
    
pkt_pts=3587|tag:lavfi.scene_score=0.272173
    
pkt_pts=4838|tag:lavfi.scene_score=0.247841
    
pkt_pts=6548|tag:lavfi.scene_score=0.233134
    
pkt_pts=9968|tag:lavfi.scene_score=0.247253
    
pkt_pts=12471|tag:lavfi.scene_score=0.244129
    
pkt_pts=16225|tag:lavfi.scene_score=0.302531
    
pkt_pts=19645|tag:lavfi.scene_score=0.303560
    
pkt_pts=22314|tag:lavfi.scene_score=0.301861
    
pkt_pts=24817|tag:lavfi.scene_score=0.249331
    
pkt_pts=25651|tag:lavfi.scene_score=0.247096
    
pkt_pts=26652|tag:lavfi.scene_score=0.287728
    
10.90s user 0.06s system 99% cpu 10.967 total
    

    3. AV_PIX_FMT_YUV422P
    

    time ./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f lavfi \
    
"sws_flags=+accurate_rnd+bitexact ;movie=../Passengers_Breakfast_1080-sdr.mkv,format=yuv422p,select=gt(scene\,.2)"
    
master :
    

    patched applied :
    
pkt_pts=3587|tag:lavfi.scene_score=0.224017
    
pkt_pts=4838|tag:lavfi.scene_score=0.204225
    
pkt_pts=9968|tag:lavfi.scene_score=0.204636
    
pkt_pts=12471|tag:lavfi.scene_score=0.202772
    
pkt_pts=16225|tag:lavfi.scene_score=0.248765
    
pkt_pts=19645|tag:lavfi.scene_score=0.250144
    
pkt_pts=22314|tag:lavfi.scene_score=0.248802
    
pkt_pts=24817|tag:lavfi.scene_score=0.208362
    
pkt_pts=25651|tag:lavfi.scene_score=0.205777
    
pkt_pts=26652|tag:lavfi.scene_score=0.230742
    

    4.  AV_PIX_FMT_YUV420P10
    
time ./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f lavfi \
    
"sws_flags=+accurate_rnd+bitexact ;movie=../Passengers_Breakfast_4k.mkv,select=gt(scene\,.2)"
    

    master :
    
pkt_pts=3587|tag:lavfi.scene_score=0.269890
    
pkt_pts=4838|tag:lavfi.scene_score=0.248957
    
pkt_pts=6548|tag:lavfi.scene_score=0.234619
    
pkt_pts=9969|tag:lavfi.scene_score=0.224912
    
pkt_pts=12471|tag:lavfi.scene_score=0.225158
    
pkt_pts=16225|tag:lavfi.scene_score=0.289809
    
pkt_pts=19645|tag:lavfi.scene_score=0.285013
    
pkt_pts=22314|tag:lavfi.scene_score=0.280295
    
pkt_pts=24817|tag:lavfi.scene_score=0.206486
    
pkt_pts=25651|tag:lavfi.scene_score=0.208556
    
pkt_pts=26652|tag:lavfi.scene_score=0.249577
    
./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f  76.03s user 0.22s system 99% cpu 1:16.27 total
    

    patch applied
    
pkt_pts=3587|tag:lavfi.scene_score=0.269890
    
pkt_pts=4838|tag:lavfi.scene_score=0.248957
    
pkt_pts=6548|tag:lavfi.scene_score=0.234619
    
pkt_pts=9969|tag:lavfi.scene_score=0.224912
    
pkt_pts=12471|tag:lavfi.scene_score=0.225158
    
pkt_pts=16225|tag:lavfi.scene_score=0.289809
    
pkt_pts=19645|tag:lavfi.scene_score=0.285013
    
pkt_pts=22314|tag:lavfi.scene_score=0.280295
    
pkt_pts=24817|tag:lavfi.scene_score=0.206486
    
pkt_pts=25651|tag:lavfi.scene_score=0.208556
    
pkt_pts=26652|tag:lavfi.scene_score=0.249577
    
./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f  50.27s user 0.20s system 99% cpu 50.476 total
    

    5. AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8
    
are tested by format= with the fate sample : Vertical400kbit.sorenson3.mov like below :
    
time ./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f lavfi \
    
"sws_flags=+accurate_rnd+bitexact ;movie=../fate-suite/svq3/Vertical400kbit.sorenson3.mov,format=rgba,select=gt(scene\,.25)"
    

    patch applied :
    
pkt_pts=1620|tag:lavfi.scene_score=1.000000
    
pkt_pts=4140|tag:lavfi.scene_score=0.656277
    
pkt_pts=5800|tag:lavfi.scene_score=1.000000
    
pkt_pts=6720|tag:lavfi.scene_score=0.346218
    
pkt_pts=8160|tag:lavfi.scene_score=0.987686
    
pkt_pts=9760|tag:lavfi.scene_score=1.000000
    
pkt_pts=14080|tag:lavfi.scene_score=0.629187
    
pkt_pts=15700|tag:lavfi.scene_score=1.000000
    
pkt_pts=18500|tag:lavfi.scene_score=0.356211
    
pkt_pts=20040|tag:lavfi.scene_score=0.284775
    
pkt_pts=21760|tag:lavfi.scene_score=1.000000
    

    6. AV_PIX_FMT_YUVJ422P
    
time ./ffprobe -of compact=p=0 -show_entries frame=pkt_pts:frame_tags -bitexact -f lavfi \
    
"sws_flags=+accurate_rnd+bitexact ;movie=../fate-suite/svq3/Vertical400kbit.sorenson3.mov,format=yuvj422p,select=gt(scene\,.25)"
    

    patch applied :
    
pkt_pts=1620|tag:lavfi.scene_score=0.838281
    
pkt_pts=4140|tag:lavfi.scene_score=0.541382
    
pkt_pts=5800|tag:lavfi.scene_score=0.780588
    
pkt_pts=6720|tag:lavfi.scene_score=0.298274
    
pkt_pts=8160|tag:lavfi.scene_score=0.699106
    
pkt_pts=9760|tag:lavfi.scene_score=0.730136
    
pkt_pts=14080|tag:lavfi.scene_score=0.537742
    
pkt_pts=15700|tag:lavfi.scene_score=0.811946
    
pkt_pts=18500|tag:lavfi.scene_score=0.263382
    
pkt_pts=21760|tag:lavfi.scene_score=0.880773
    

    Reviewed-by : Marton Balint <cus@passwd.hu>
    
Signed-off-by : Limin Wang <lance.lmwang@gmail.com>
    • [DH] libavfilter/f_select.c
    • [DH] tests/ref/fate/filter-metadata-scenedetect

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