On 7/25/19, dimaseriy <[email protected]> wrote: > I tried > > mkdir -p ~/ffmpeg_sources ~/bin > cd ~/ffmpeg_sources > wget -O ffmpeg-snapshot.tar.bz2 > https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2 && tar xjvf > ffmpeg-snapshot.tar.bz2 && cd ffmpeg > > but I got > > $ PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" > ./configure --prefix="$HOME/ffmpeg_build" --pkg-config-flags="--static" > --extra-cflags="-I$HOME/ffmpeg_build/include" > --extra-ldflags="-L$HOME/ffmpeg_build/lib" --extra-libs="-lpthread -lm" > --bindir="$HOME/bin" --enable-gpl --enable-nonfree --enable-avresample > --enable-avisynth --enable-libass --enable-libcaca --enable-libcdio > --enable-libfontconfig --enable-libfreetype --enable-libfribidi > --enable-libgsm --enable-libopenjpeg --enable-libopenmpt --enable-libopus > --enable-libpulse --enable-librubberband --enable-librsvg --enable-libsnappy > --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora > --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack > --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid > --enable-libzmq --enable-libzvbi --enable-omx --enable-openal > --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm > --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv > --enable-libx264 --enable-shared > ERROR: libopencv not found > > If you think configure made a mistake, make sure you are using the latest > version from Git. If the latest version fails, report the problem to the > [email protected] mailing list or IRC #ffmpeg on irc.freenode.net. > Include the log file "ffbuild/config.log" produced by configure as this will > help > solve the problem. > > However > > $ dpkg -l | grep 'libopencv-core' > ii libopencv-core-dev:amd64 3.2.0+dfsg-4ubuntu0.1 > amd64 development files for > libopencv-core3.2 > ii libopencv-core3.2:amd64 3.2.0+dfsg-4ubuntu0.1 > amd64 computer vision core library > $ dpkg -l | grep 'libopencv-dev' > ii libopencv-dev 3.2.0+dfsg-4ubuntu0.1 > amd64 development files for opencv
Note that from some version onward they dropped C support IIRC, so you could not have it even if you have it installed. > > 25.07.2019, 15:04, "Moritz Barsnick" <[email protected]>: >> On Thu, Jul 25, 2019 at 03:34:59 -0400, Ted Park wrote: >>> > I want to use the ocv filer for ffmpeg. The documentation says: >>> > >>> > "To enable this filter, install the libopencv library and headers and >>> configure FFmpeg with --enable-libopencv .” >>> >>> Do what the documentation says? >>> >>> > I use ffmpeg from Ubuntu repos. >>> >>> You need to “configure FFmpeg with —enable-libopencv” after installing >>> the library, then compile yourself, or find a ffmpeg with the library >>> enabled. The ffmpeg from the Ubuntu repo is old. >> >> Interestingly, the Ubuntu build is apparently built with >> "—enable-libopencv", but they managed not to get the "ocv" filter in. >> >>> > How do I make this filter available? What packages should I install in >>> Ubuntu 18.04 (it has many packages called libopencv*) and should I build >>> ffmpeg from source? >>> >>> Try installing the core library then configuring. >> >> And the development package as well (so perhaps libopencv-dev and >> libopencv-core-dev). >> >> Moritz >> _______________________________________________ >> ffmpeg-user mailing list >> [email protected] >> https://ffmpeg.org/mailman/listinfo/ffmpeg-user >> >> To unsubscribe, visit link above, or email >> [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
