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#7264 closed defect (wontfix)

libvmaf segmentation fault at ffmpeg 4.0

Reported by:	George Stoyanov	Owned by:
Priority:	important	Component:	avfilter
Version:	git-master	Keywords:	libvmaf
Cc:		Blocked By:
Blocking:		Reproduced by developer:	no
Analyzed by developer:	no

Description

I am trying to compare two videos using the libvmaf in ffmpeg 4.0. I have compiled and installed from source VMAF and FFMPEG and FFMPEG has built-in support for libvmaf. That's the ffmpeg configuration:

    $ ffmpeg -version
    ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
    configuration: --pkg-config-flags=--static --extra-libs='-lpthread -lm' --toolchain=hardened --enable-gpl --enable-nonfree --enable-version3 --disable-stripping --enable-avisynth --enable-libass --enable-libfontconfig --enable-libfreetype --enable-libvmaf --enable-libfribidi --enable-libgme --enable-libgsm --enable-librubberband --enable-libshine --enable-libsnappy --enable-libssh --enable-libtwolame --enable-libwavpack --enable-libzvbi --enable-openal --enable-sdl2 --enable-libdrm --enable-frei0r --enable-ladspa --enable-libpulse --enable-libsoxr --enable-libspeex --enable-avfilter --enable-postproc --enable-pthreads --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --disable-ffplay --enable-libopenjpeg --enable-libsrt --enable-libwebp --enable-libxvid --enable-libvidstab --enable-libopenh264 --enable-zlib --enable-openssl
    libavutil      56. 14.100 / 56. 14.100
    libavcodec     58. 18.100 / 58. 18.100
    libavformat    58. 12.100 / 58. 12.100
    libavdevice    58.  3.100 / 58.  3.100
    libavfilter     7. 16.100 /  7. 16.100
    libswscale      5.  1.100 /  5.  1.100
    libswresample   3.  1.100 /  3.  1.100
    libpostproc    55.  1.100 / 55.  1.100

My VMAF is version:

 VMAF Development Kit (VDK) Version 1.3.5
 VMAF Version 0.6.3

When I try to run the VMAF on both files using the following command I get a segmentation fault error and error about unknown format and segmentation fault. The syntax of my command is the following:
`
ffmpeg -i distorted.nut -i reference.nut -lavfi libvmaf -f null -
`
The NUT files in this case are both in raw format. I have tried to convert the nut to mp4 using libx264 but the result was exactly the same. I have uploaded the log file to https://we.tl/gUNY9Adoky with the debug information.

If I run the VMAF manually from the VMAF install directory I got the results:

./run_vmaf yuv420p 1280 720 reference.nut distorted.nut --out-fmt json

This is the aggregated VMAF score:

    "aggregate": {
            "VMAF_feature_adm2_score": 0.989985319391465,
            "VMAF_feature_motion2_score": 12.065062245699426,
            "VMAF_feature_vif_scale0_score": 0.6955497705160056,
            "VMAF_feature_vif_scale1_score": 0.956442334512976,
            "VMAF_feature_vif_scale2_score": 0.9785004960696057,
            "VMAF_feature_vif_scale3_score": 0.9873306412919364,
            "VMAF_score": 99.37877231666236,
            "method": "mean"
        }

I have checked and the library header libvmaf.h is under /usr/local/include, the library libvmaf.a under /user/local/lib and all the model files under /usr/local/share, so everything looks OK.

Attachments (2)

compilation_error.log (32.8 KB ) - added by George Stoyanov 6 years ago.: compilation log of the ffmpeg git head
compilation_ffmpeg_nightly_VDK_1_3_4.log (119.3 KB ) - added by George Stoyanov 6 years ago.: compilation log of the latest nightly FFMPEG with libvmaf VDK 1.3.5

Download all attachments as: .zip

Change History (18)

comment:1 by Carl Eugen Hoyos, 6 years ago

Keywords:	libvmaf added; vmaf removed

Please test current FFmpeg git head (nothing else is supported here) and provide complete, uncut console output, backtrace, disassembly and register dump as explained on https://ffmpeg.org/bugreports.html

comment:2 by George Stoyanov, 6 years ago

I have tried to compile the git head with libvmaf support but I got an error:

libavfilter/vf_libvmaf.c: In function ‘compute_vmaf_score’:
libavfilter/vf_libvmaf.c:165:16: error: too few arguments to function ‘compute_vmaf’
     s->error = compute_vmaf(&s->vmaf_score, format, s->width, s->height,
                ^
In file included from libavfilter/vf_libvmaf.c:28:0:
/usr/local/include/libvmaf.h:26:5: note: declared here
 int compute_vmaf(double* vmaf_score, char* fmt, int width, int height, int (*read_frame)(float *ref_data, float *main_data, float *temp_data, int stride_byte, void *user_data),
     ^
ffbuild/common.mak:60: recipe for target 'libavfilter/vf_libvmaf.o' failed
make: *** [libavfilter/vf_libvmaf.o] Error 1

My compilation code is:

git clone https://github.com/FFmpeg/FFmpeg.git
cd FFmpeg
./configure \
        --pkg-config-flags="--static" \
        --extra-libs="-lpthread -lm" \
        --toolchain=hardened \
        --enable-gpl \
        --enable-nonfree \
        --enable-version3 \
        --disable-stripping \
        --enable-avisynth \
        --enable-libass \
        --enable-libfontconfig \
        --enable-libfreetype \
        --enable-libvmaf \
        --enable-libfribidi \
        --enable-libgme \
        --enable-libgsm \
        --enable-librubberband \
        --enable-libshine \
        --enable-libsnappy \
        --enable-libssh \
        --enable-libtwolame \
        --enable-libwavpack \
        --enable-libzvbi \
        --enable-openal \
        --enable-sdl2 \
        --enable-libdrm \
        --enable-frei0r \
        --enable-ladspa \
        --enable-libpulse \
        --enable-libsoxr \
        --enable-libspeex \
        --enable-avfilter \
        --enable-postproc \
        --enable-pthreads \
        --enable-libfdk-aac \
        --enable-libmp3lame \
        --enable-libopus \
        --enable-libtheora \
        --enable-libvorbis \
        --enable-libvpx \
        --enable-libx264 \
        --enable-libx265 \
        --disable-ffplay \
        --enable-libopenjpeg \
            --enable-libsrt \
        --enable-libwebp \
        --enable-libxvid \
        --enable-libvidstab \
        --enable-libopenh264 \
        --enable-zlib \
        --enable-openssl
make -j16
sudo make install
sudo make distclean

I have uploaded the compilation log in the attachment section if you want I can also provide the detailed bug reports in ffmpeg 4.0 but you said you are not supporting it.

Last edited 6 years ago by George Stoyanov (previous) (diff)

by George Stoyanov, 6 years ago

Attachment:	compilation_error.log added

compilation log of the ffmpeg git head

comment:3 by Carl Eugen Hoyos, 6 years ago

You don’t get the same compilation error with 4.0?

comment:4 by George Stoyanov, 6 years ago

you are right I have tried to recompile ffmpeg 4.0 right now and got the same error. I think it is because I have re-compiled the VMAF yesterday and this changed the VMAF VDK version from 1.3.5 to 1.3.6 so apparently the latest VMAF git build is not working with ffmpeg. But the segmentation fault error was happening on the previous VMAF version as well.

Last edited 6 years ago by George Stoyanov (previous) (diff)

comment:5 by George Stoyanov, 6 years ago

I have also opened a ticket in Github regarding this and some other issues: https://github.com/Netflix/vmaf/issues/174

comment:6 by George Stoyanov, 6 years ago

And with a bit of delay I am posting the uncut command with the segmentation fault error:

ffmpeg -i distorted.nut -i reference.nut -lavfi libvmaf -f null -
ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  configuration: --pkg-config-flags=--static --extra-libs='-lpthread -lm' --toolchain=hardened --enable-gpl --enable-nonfree --enable-version3 --disable-stripping --enable-avisynth --enable-libass --enable-libfontconfig --enable-libfreetype --enable-libvmaf --enable-libfribidi --enable-libgme --enable-libgsm --enable-librubberband --enable-libshine --enable-libsnappy --enable-libssh --enable-libtwolame --enable-libwavpack --enable-libzvbi --enable-openal --enable-sdl2 --enable-libdrm --enable-frei0r --enable-ladspa --enable-libpulse --enable-libsoxr --enable-libspeex --enable-avfilter --enable-postproc --enable-pthreads --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --disable-ffplay --enable-libopenjpeg --enable-libsrt --enable-libwebp --enable-libxvid --enable-libvidstab --enable-libopenh264 --enable-zlib --enable-openssl
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
Input #0, nut, from 'distorted.nut':
  Metadata:
    encoder         : Lavf58.12.100
  Duration: 00:04:59.94, start: 0.000000, bitrate: 553011 kb/s
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, SAR 1:1 DAR 16:9, 50 fps, 50 tbr, 51200 tbn, 51200 tbc
    Metadata:
      encoder         : Lavc58.18.100 rawvideo
Input #1, nut, from 'reference.nut':
  Metadata:
    encoder         : Lavf58.12.100
  Duration: 00:04:59.96, start: 0.000000, bitrate: 553011 kb/s
    Stream #1:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, SAR 1:1 DAR 16:9, 50 fps, 50 tbr, 51200 tbn, 51200 tbc
    Metadata:
      encoder         : Lavc58.18.100 rawvideo
Stream mapping:
  Stream #0:0 (rawvideo) -> libvmaf:main
  Stream #1:0 (rawvideo) -> libvmaf:reference
  libvmaf -> Stream #0:0 (wrapped_avframe)
Press [q] to stop, [?] for help
Start calculating VMAF score...
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf58.12.100
    Stream #0:0: Video: wrapped_avframe, yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 50 fps, 50 tbn, 50 tbc (default)
    Metadata:
      encoder         : Lavc58.18.100 wrapped_avframe
unknown format ▒h▒rU.
Segmentation fault (core dumped)

follow-up: 8 comment:7 by Carl Eugen Hoyos, 6 years ago

in reply to: 7 comment:8 by George Stoyanov, 6 years ago

Replying to cehoyos:

Please test current FFmpeg git head (nothing else is supported here) and provide complete, uncut console output, backtrace, disassembly and register dump as explained on https://ffmpeg.org/bugreports.html

I have already tested it and reported my findings. The most recent git head doesn't work with the most recent VMAF build. It doesn't want to compile, I have attached the compilation error log alongside.

comment:9 by Carl Eugen Hoyos, 6 years ago

Didn’t you already downgrade libvmaf to allow compilation to succeed?

comment:10 by George Stoyanov, 6 years ago

With latest FFMPEG nightly and VDK 1.3.5

ffmpeg -i distcut.nut -i refcut.nut -lavfi libvmaf="log_fmt=json:log_path=ffvmaf.json:psnr=1:ssim=1:ms_ssim=1" -f null -                               ffmpeg version N-91330-ga990184 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  configuration: --pkg-config-flags=--static --extra-libs='-lpthread -lm' --toolchain=hardened --enable-gpl --enable-nonfree --enable-version3 --disable-stripping --enable-avisynth --enable-libass --enable-libfontconfig --enable-libfreetype --enable-libvmaf --enable-libfribidi --enable-libgme --enable-libgsm --enable-librubberband --enable-libshine --enable-libsnappy --enable-libssh --enable-libtwolame --enable-libwavpack --enable-libzvbi --enable-openal --enable-sdl2 --enable-libdrm --enable-frei0r --enable-ladspa --enable-libpulse --enable-libsoxr --enable-libspeex --enable-avfilter --enable-postproc --enable-pthreads --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --disable-ffplay --enable-libopenjpeg --enable-libsrt --enable-libwebp --enable-libxvid --enable-libvidstab --enable-libopenh264 --enable-zlib --enable-openssl
  libavutil      56. 18.102 / 56. 18.102
  libavcodec     58. 20.103 / 58. 20.103
  libavformat    58. 17.100 / 58. 17.100
  libavdevice    58.  4.101 / 58.  4.101
  libavfilter     7. 25.100 /  7. 25.100
  libswscale      5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc    55.  2.100 / 55.  2.100
Input #0, nut, from 'distcut.nut':
  Metadata:
    encoder         : Lavf58.12.100
  Duration: 00:00:39.98, start: 0.000000, bitrate: 553250 kb/s
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, SAR 1:1 DAR 16:9, 50 fps, 50 tbr, 51200 tbn, 51200 tbc
    Metadata:
      encoder         : Lavc58.18.100 rawvideo
Input #1, nut, from 'refcut.nut':
  Metadata:
    encoder         : Lavf58.12.100
  Duration: 00:00:39.98, start: 0.000000, bitrate: 553250 kb/s
    Stream #1:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, SAR 1:1 DAR 16:9, 50 fps, 50 tbr, 51200 tbn, 51200 tbc
    Metadata:
      encoder         : Lavc58.18.100 rawvideo
Stream mapping:
  Stream #0:0 (rawvideo) -> libvmaf:main
  Stream #1:0 (rawvideo) -> libvmaf:reference
  libvmaf -> Stream #0:0 (wrapped_avframe)
Press [q] to stop, [?] for help
Start calculating VMAF score...
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf58.17.100
    Stream #0:0: Video: wrapped_avframe, yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 50 fps, 50 tbn, 50 tbc (default)
    Metadata:
      encoder         : Lavc58.20.103 wrapped_avframe
unknown format ▒I▒/V.
Segmentation fault (core dumped)

If I downgrade the VMAF to v.1.3.4 it works:

$ ffmpeg -i distcut.nut -i refcut.nut -lavfi libvmaf="log_fmt=json:log_path=ffvmaf_nut.json:psnr=1:ssim=1:ms_ssim=1" -f null -                        ffmpeg version N-91330-ga990184 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  configuration: --pkg-config-flags=--static --extra-libs='-lpthread -lm' --toolchain=hardened --enable-gpl --enable-nonfree --enable-version3 --disable-stripping --enable-avisynth --enable-libass --enable-libfontconfig --enable-libfreetype --enable-libvmaf --enable-libfribidi --enable-libgme --enable-libgsm --enable-librubberband --enable-libshine --enable-libsnappy --enable-libssh --enable-libtwolame --enable-libwavpack --enable-libzvbi --enable-openal --enable-sdl2 --enable-libdrm --enable-frei0r --enable-ladspa --enable-libpulse --enable-libsoxr --enable-libspeex --enable-avfilter --enable-postproc --enable-pthreads --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --disable-ffplay --enable-libopenjpeg --enable-libsrt --enable-libwebp --enable-libxvid --enable-libvidstab --enable-libopenh264 --enable-zlib --enable-openssl
  libavutil      56. 18.102 / 56. 18.102
  libavcodec     58. 20.103 / 58. 20.103
  libavformat    58. 17.100 / 58. 17.100
  libavdevice    58.  4.101 / 58.  4.101
  libavfilter     7. 25.100 /  7. 25.100
  libswscale      5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc    55.  2.100 / 55.  2.100
Input #0, nut, from 'distcut.nut':
  Metadata:
    encoder         : Lavf58.12.100
  Duration: 00:00:39.98, start: 0.000000, bitrate: 553250 kb/s
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, SAR 1:1 DAR 16:9, 50 fps, 50 tbr, 51200 tbn, 51200 tbc
    Metadata:
      encoder         : Lavc58.18.100 rawvideo
Input #1, nut, from 'refcut.nut':
  Metadata:
    encoder         : Lavf58.12.100
  Duration: 00:00:39.98, start: 0.000000, bitrate: 553250 kb/s
    Stream #1:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, SAR 1:1 DAR 16:9, 50 fps, 50 tbr, 51200 tbn, 51200 tbc
    Metadata:
      encoder         : Lavc58.18.100 rawvideo
Stream mapping:
  Stream #0:0 (rawvideo) -> libvmaf:main
  Stream #1:0 (rawvideo) -> libvmaf:reference
  libvmaf -> Stream #0:0 (wrapped_avframe)
Press [q] to stop, [?] for help
Start calculating VMAF score...
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf58.17.100
    Stream #0:0: Video: wrapped_avframe, yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 50 fps, 50 tbn, 50 tbc (default)
    Metadata:
      encoder         : Lavc58.20.103 wrapped_avframe
frame= 2000 fps=2.6 q=-0.0 Lsize=N/A time=00:00:40.00 bitrate=N/A speed=0.0522x
video:1047kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Exec FPS: 2.606700
VMAF score = 91.079469
[libvmaf @ 0x5622212ba880] VMAF score: 91.079469

So apparently something changed in VDK 1.3.5 which is causing segmentation fault when you try to run the filter and to evaluate the VMAF of two files and from VDK 1.3.6 onwards, latest is 1.3.7, ffmpeg is unable to compile with libvmaf support.

comment:11 by George Stoyanov, 6 years ago

Version:	unspecified → git-master

comment:12 by Carl Eugen Hoyos, 6 years ago

Priority:	normal → important

While this is apparently a libvmaf regression, there is an issue: libvmaf is not only breaking API as in ticket #7248 but possibly also ABI. I wonder if such an unstable wrapper makes sense in FFmpeg.
Is there a warning shown when compiling libavfilter/vf_libvmaf.o?

by George Stoyanov, 6 years ago

Attachment:	compilation_ffmpeg_nightly_VDK_1_3_4.log added

compilation log of the latest nightly FFMPEG with libvmaf VDK 1.3.5

comment:13 by George Stoyanov, 6 years ago

As far as I can see from the log there aren't any errors with libvmaf library in it.

I have added the compilation_ffmpeg_nightly_VDK_1_3_4.log to the attachment list, it is the compilation log of the latest ffmpeg nightly with VMAF VDK 1.3.5. Please note that the name of the file is wrong and it should be 1.3.5, not 1.3.4.

Last edited 6 years ago by George Stoyanov (previous) (diff)

comment:14 by Carl Eugen Hoyos, 6 years ago

As in: Making the answer to a question as difficult to parse as possible?

comment:15 by George Stoyanov, 6 years ago

I have modified my comment.

On top of that ffmpeg libvmaf filter is calcuating the PSNR, SSIM, MS-SSIM differently so the average scores when using libvmaf are:

ffmpeg -i distcut.nut -i refcut.nut -lavfi libvmaf="log_fmt=json:log_path=/home/ubuntu/ffvmaf_nut.json:psnr=1:ssim=1:ms_ssim=1" -f null -

ADM2: 0.9828
Motion2: 0.0464
VIF Scale0: 0.6618
VIF Scale1: 0.9437
VIF Scale2: 0.9708
VIF Scale3: 0.9815
VMAF: 91.0795
PSNR: 40.7593dB
SSIM: 0.9919
MS-SSIM: 0.9919

The average scores I am getting while running a python script which calculates the average of all the scores from the json log file.

if I run the same metrics in ffmpeg:

ffmpeg -i distcut.nut -i refcut.nut -lavfi "ssim;[0:v][1:v]psnr" -f null –
ffmpeg version N-91330-ga990184 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  configuration: --pkg-config-flags=--static --extra-libs='-lpthread -lm' --toolchain=hardened --enable-gpl --enable-nonfree --enable-version3 --disable-stripping --enable-avisynth --enable-libass --enable-libfontconfig --enable-libfreetype --enable-libvmaf --enable-libfribidi --enable-libgme --enable-libgsm --enable-librubberband --enable-libshine --enable-libsnappy --enable-libssh --enable-libtwolame --enable-libwavpack --enable-libzvbi --enable-openal --enable-sdl2 --enable-libdrm --enable-frei0r --enable-ladspa --enable-libpulse --enable-libsoxr --enable-libspeex --enable-avfilter --enable-postproc --enable-pthreads --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --disable-ffplay --enable-libopenjpeg --enable-libsrt --enable-libwebp --enable-libxvid --enable-libvidstab --enable-libopenh264 --enable-zlib --enable-openssl
  libavutil      56. 18.102 / 56. 18.102
  libavcodec     58. 20.103 / 58. 20.103
  libavformat    58. 17.100 / 58. 17.100
  libavdevice    58.  4.101 / 58.  4.101
  libavfilter     7. 25.100 /  7. 25.100
  libswscale      5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc    55.  2.100 / 55.  2.100
Input #0, nut, from 'distcut.nut':
  Metadata:
    encoder         : Lavf58.12.100
  Duration: 00:00:39.98, start: 0.000000, bitrate: 553250 kb/s
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, SAR 1:1 DAR 16:9, 50 fps, 50 tbr, 51200 tbn, 51200 tbc
    Metadata:
      encoder         : Lavc58.18.100 rawvideo
Input #1, nut, from 'refcut.nut':
  Metadata:
    encoder         : Lavf58.12.100
  Duration: 00:00:39.98, start: 0.000000, bitrate: 553250 kb/s
    Stream #1:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, SAR 1:1 DAR 16:9, 50 fps, 50 tbr, 51200 tbn, 51200 tbc
    Metadata:
      encoder         : Lavc58.18.100 rawvideo
Stream mapping:
  Stream #0:0 (rawvideo) -> ssim:main
  Stream #0:0 (rawvideo) -> psnr:main
  Stream #1:0 (rawvideo) -> ssim:reference
  Stream #1:0 (rawvideo) -> psnr:reference
  ssim -> Stream #0:0 (wrapped_avframe)
  psnr -> Stream #0:1 (wrapped_avframe)
Press [q] to stop, [?] for help
Output #0, null, to '–':
  Metadata:
    encoder         : Lavf58.17.100
    Stream #0:0: Video: wrapped_avframe, yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 50 fps, 50 tbn, 50 tbc
    Metadata:
      encoder         : Lavc58.20.103 wrapped_avframe
    Stream #0:1: Video: wrapped_avframe, yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 50 fps, 50 tbn, 50 tbc
    Metadata:
      encoder         : Lavc58.20.103 wrapped_avframe
frame= 2000 fps=764 q=-0.0 Lq=-0.0 size=N/A time=00:00:40.00 bitrate=N/A speed=15.3x
video:2094kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[Parsed_ssim_0 @ 0x55ffa5e9f8c0] SSIM Y:0.969197 (15.114140) U:0.973418 (15.754072) V:0.974990 (16.018821) All:0.970866 (15.356039)
[Parsed_psnr_1 @ 0x55ffa5e81700] PSNR y:38.856330 u:43.963544 v:43.765811 average:39.980715 min:27.518272 max:50.428166

So as you can see there is a difference between the average PSNR and SSIM while using the built-in PSNR and SSIM filters and libvmaf.

Last edited 6 years ago by George Stoyanov (previous) (diff)

comment:16 by Elon Musk, 5 years ago

Resolution:	→ wontfix
Status:	new → closed

There is no spoon.

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