Error: undefined reference while building FFmpeg with libvmaf

[hemrajchauhan]

config.log

I tried to build ffmpeg with libvmaf and i get this errors:

C:/msys64/mingw64/lib/libvmaf.a(svm.cpp.o):svm.cpp:(.rdata$_ZTV6Kernel[_ZTV6Kernel]+0x10): undefined reference to __cxa_pure_virtual' C:/msys64/mingw64/lib/libvmaf.a(svm.cpp.o):svm.cpp:(.rdata$_ZTV6Kernel[_ZTV6Kernel]+0x18): undefined reference to __cxa_pure_virtual'
collect2.exe: error: ld returned 1 exit status
ERROR: libvmaf >= 1.3.9 not found using pkg-config

Please see the full attached log for details.

Kindly help to configure FFmpeg correctly for libvmaf.

[1480c1]

You need to link it with -lstdc++. You can try adding it to your CFLAGS while compiling FFmpeg or add it to your pkg-config file

[hemrajchauhan]

Thank you very much for the help and prompt response.

I configured ffmpeg using
$ ../configure --enable-shared --disable-static --enable-libvmaf --enable-version3 --extra-libs="-lstdc++" --prefix="/build/ffmpeg"

and it worked.

[hemrajchauhan]

After compiling FFmpeg with libvmaf, when i try to run following command using ffmpeg:
ffmpeg.exe -i output.mp4 -i input.mp4 -lavfi libvmaf -f null -

I get this error: No such filter: 'libvmaf'. Error initializing complex filters.

It seems that ffmpeg is not compiled with libvmaf even though configuring it with that.
Please help if there is anything else which needs to be done besides mentioning --enable-libvmaf --enable-version3 during configuration step.

ffmpeg version N-97727-g7a92147f87 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 8.3.0 (Rev2, Built by MSYS2 project)
configuration: --prefix=/build --extra-cflags='-std=c++11' --extra-libs=-lstdc++ --enable-libvmaf --enable-version3
libavutil 56. 44.100 / 56. 44.100
libavcodec 58. 83.100 / 58. 83.100
libavformat 58. 43.100 / 58. 43.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 80.100 / 7. 80.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
Metadata:
major_brand : mp42
minor_version : 512
compatible_brands: isomiso2mp41
creation_time : 2020-05-13T12:50:06.000000Z
encoder : HandBrake 20191111091450-163ecac-master 2019111101
Duration: 00:00:37.31, start: 0.000000, bitrate: 3668 kb/s
Stream #0:0(und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 3663 kb/s, 25 fps, 25 tbr, 90k tbn, 25 tbc (default)
Metadata:
creation_time : 2020-05-13T12:50:06.000000Z
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 2 kb/s (default)
Metadata:
creation_time : 2020-05-13T12:50:06.000000Z
handler_name : Stereo
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2019-11-19T16:35:35.000000Z
Duration: 00:00:37.33, start: 0.000000, bitrate: 18672 kb/s
Stream #1:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 18375 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
Metadata:
creation_time : 2019-11-19T16:35:35.000000Z
handler_name : ?Mainconcept Video Media Handler
encoder : AVC Coding
Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
Metadata:
creation_time : 2019-11-19T16:35:35.000000Z
handler_name : #Mainconcept MP4 Sound Media Handler
[AVFilterGraph @ 0000000002696340] No such filter: 'libvmaf'
Error initializing complex filters.
Invalid argument

[HolyWu]

You need --enable-pthreads --disable-w32threads while configuring FFmpeg because of this since you are using MSYS2 on Windows and hence FFmpeg will select w32threads rather than pthreads.

[li-zhi]

@HolyWu is it worth adding this instruction to a doc, for example, this page below?
https://github.com/Netflix/vmaf/blob/master/resource/doc/ffmpeg.md

[hemrajchauhan]

Thanks @HolyWu it worked. It would be nice if you add this information in the doc because i am sure it will save time for other people.