OpenCV warning: too many thread_release_buffer calls

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I get such warning when I try to extract frames from videos:

[mpeg4 @ 0x7ffc0c081180] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffc0c081180] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffc0c081180] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffc0c081180] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffc0c081180] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffc0c081180] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffad411b400] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffad411b400] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffad411b400] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffad411b400] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffad411b400] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffad411b400] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffad411b400] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffad411b400] too many thread_release_buffer calls!
[mpeg4 @ 0x7ffad411b400] too many thread_release_buffer calls!

Solution for this: upgrade the ffmpeg and its dependency libraries(In old ffmpeg, it has a limit for max number of threads: #define MAX_THREAD (34+1) )。

Remember that before conducting the installation of below reference, we need uninstall the installed opencv:

sudo apt-get autoremove libopencv-dev

The rest installation please refer this web site: http://neicole.blog.51cto.com/5621716/1369620

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