[FFmpeg-trac] #7825(avfilter:new): `-lavfi ssim` is not colorspace aware?..

FFmpeg trac at avcodec.org
Wed Apr 3 11:07:25 EEST 2019


#7825: `-lavfi ssim` is not colorspace aware?..
-------------------------------------+-------------------------------------
             Reporter:  gdgsdg123    |                     Type:
                                     |  enhancement
               Status:  new          |                 Priority:  normal
            Component:  avfilter     |                  Version:  git-
             Keywords:  ssim,        |  master
  colorspace                         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Build from:
 https://zeranoe.com/builds/win64/static/ffmpeg-20190402-6aeaac3-win64-static.zip
 {{{
 C:\>ffmpeg -i "bt709.avi" -i "bt601.avi" -lavfi ssim -f null -
 ffmpeg version N-93515-g6aeaac3e1c Copyright (c) 2000-2019 the FFmpeg
 developers
   built with gcc 8.2.1 (GCC) 20190212
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-
 libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr
 --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack
 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2
 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-
 libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa
 --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx
 --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-
 nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
   libavutil      56. 26.100 / 56. 26.100
   libavcodec     58. 48.100 / 58. 48.100
   libavformat    58. 26.101 / 58. 26.101
   libavdevice    58.  7.100 / 58.  7.100
   libavfilter     7. 48.100 /  7. 48.100
   libswscale      5.  4.100 /  5.  4.100
   libswresample   3.  4.100 /  3.  4.100
   libpostproc    55.  4.100 / 55.  4.100
 [avi @ 00000000005218c0] decoding for stream 0 failed
 Input #0, avi, from 'bt709.avi':
   Duration: 00:00:00.03, start: 0.000000, bitrate: 206981 kb/s
     Stream #0:0: Video: h264 (High 4:4:4 Predictive) (H264 / 0x34363248),
 yuv420p10le(tv, bt709, progressive), 1440x836, 30 fps, 30 tbr, 30 tbn, 60
 tbc
 [avi @ 0000000002e965c0] decoding for stream 0 failed
 Input #1, avi, from 'bt601.avi':
   Duration: 00:00:00.03, start: 0.000000, bitrate: 206981 kb/s
     Stream #1:0: Video: h264 (High 4:4:4 Predictive) (H264 / 0x34363248),
 yuv420p10le(tv, smpte170m, progressive), 1440x836, 30 fps, 30 tbr, 30 tbn,
 60 tbc
 Stream mapping:
   Stream #0:0 (h264) -> ssim:main
   Stream #1:0 (h264) -> ssim:reference
   ssim -> Stream #0:0 (wrapped_avframe)
 Press [q] to stop, [?] for help
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf58.26.101
     Stream #0:0: Video: wrapped_avframe, yuv420p10le, 1440x836, q=2-31,
 200 kb/s, 30 fps, 30 tbn, 30 tbc (default)
     Metadata:
       encoder         : Lavc58.48.100 wrapped_avframe
 frame=    1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.03 bitrate=N/A
 speed=0.189x
 video:1kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 [Parsed_ssim_0 @ 0000000002df0f40] SSIM Y:1.000000 (inf) U:1.000000 (inf)
 V:1.000000 (inf) All:1.000000 (inf)

 }}}
 "bt709.avi" and "bt601.avi" are from the same source and encoded using the
 same parameters, but tagged differently.

 And apparently they don't look the same...

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7825>
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