[Buildroot] package/opencv3: missing ffmpeg and gstreamer on configure step.

[yann.morin at orange.com]

Evgeniy, All,

On 2019-02-27 13:04 +0000, Evgeniy Didin spake thusly:
> Trying to build opencv3 with enabled ffmpeg and gstreamer support I have faced with the issue, that
> during configure process opencv3 is not able to find ffmpeg and gstreamer, which are already built.
> Here is part of the config log:
> --------------------8<---------------------------------
> ...
> -- Looking for sys/videoio.h
> -- Looking for sys/videoio.h - not found
> -- Can't find ffmpeg - 'pkg-config' utility is missing

First, you need to add host-pkgconf to OPENCV3_DEPENDENCIES.
See if that fixes the problem, at least for ffmpeg.

Regards,
Yann E. MORIN.

> -- Performing Test HAVE_CXX_WNO_DEPRECATED
> ...
> -------------------->8---------------------------------
> 
> And finally in the end of log I see next message:
> --------------------8<---------------------------------
> ...
> --   Video I/O:
> --     FFMPEG:                      NO
> --       avcodec:                   NO
> --       avformat:                  NO
> --       avutil:                    NO
> --       swscale:                   NO
> --       avresample:                NO
> --     GStreamer:                   NO
> --     libv4l/libv4l2:              NO
> --     v4l/v4l2:                    linux/videodev2.h
> ...
> -------------------->8---------------------------------
> 
> At the same time modifying output/build/opencv3-3.4.3/CMakeLists.txt file
> by adding lines like "set(HAVE_FFMPEG YES)" leads to successfull opencv3 building
> with ffmpeg and gstreamer support.
> 
> Is it a know issue?
> Maybe I have missed something during configurating of the build?
> 
> Best regards,
> Evgeniy Didin
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

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