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Sur d’autres sites (15825)

  • libx264.so.146 not found while compiling C++ code or x264 itself

    27 février 2017, par Laurent Loots

    I just upgraded my system from Ubuntu 15.10 to Ubuntu 16.04 LTS. Now, for some reason my C++ project won’t compile anymore. CLion keeps saying it’s missing ’libx264.so.146 as you can see in the compile log :

    /home/lorre851/CLion/bin/cmake/bin/cmake --build /home/lorre851/.CLion12/system/cmake/generated/ce7171e4/ce7171e4/Release --target main -- -j 8
    
[ 20%] Linking CXX executable build/main
    
/usr/bin/ld: warning: libx264.so.146, needed by /usr/local/lib/libavcodec.so.57, not found (try using -rpath or -rpath-link)
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_open_146'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_close'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_bit_depth'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_headers'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_encode'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_reconfig'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_parse'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_apply_profile'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_apply_fastfirstpass'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_levels'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_picture_init'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_default'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_default_preset'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_delayed_frames'
    
collect2: error: ld returned 1 exit status
    
CMakeFiles/main.dir/build.make:172: recipe for target 'build/main' failed
    
make[3]: *** [build/main] Error 1
    
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/main.dir/all' failed
    
make[2]: *** [CMakeFiles/main.dir/all] Error 2
    
CMakeFiles/Makefile2:79: recipe for target 'CMakeFiles/main.dir/rule' failed
    
make[1]: *** [CMakeFiles/main.dir/rule] Error 2
    
Makefile:118: recipe for target 'main' failed
    
make: *** [main] Error 2

    Most people seem to give ’reinstalling x264’ as a solution. However, reinstalling x264 with the following commands leads to the same error while compiling x264 itself.

    git clone git://git.videolan.org/x264
    
cd x264
    
./configure --enable-static
    
make
    

    
/usr/bin/ld: warning: libx264.so.146, needed by /usr/local/lib/libavcodec.so, not found (try using -rpath or -rpath-link)
    
/usr/local/lib/libavcodec.so: undefined reference to `x264_encoder_open_146'
    
collect2: error: ld returned 1 exit status
    
Makefile:202: recipe for target 'x264' failed
    
make: *** [x264] Error 1

    Does anyone have an idea how I could get around this ?

  • libx264.so.146 not found while compiling C++ code or x264 itself

    27 février 2017, par Laurent Loots

    I just upgraded my system from Ubuntu 15.10 to Ubuntu 16.04 LTS. Now, for some reason my C++ project won’t compile anymore. CLion keeps saying it’s missing ’libx264.so.146 as you can see in the compile log :

    /home/lorre851/CLion/bin/cmake/bin/cmake --build /home/lorre851/.CLion12/system/cmake/generated/ce7171e4/ce7171e4/Release --target main -- -j 8
    
[ 20%] Linking CXX executable build/main
    
/usr/bin/ld: warning: libx264.so.146, needed by /usr/local/lib/libavcodec.so.57, not found (try using -rpath or -rpath-link)
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_open_146'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_close'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_bit_depth'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_headers'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_encode'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_reconfig'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_parse'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_apply_profile'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_apply_fastfirstpass'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_levels'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_picture_init'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_default'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_param_default_preset'
    
/usr/local/lib/libavcodec.so.57: undefined reference to `x264_encoder_delayed_frames'
    
collect2: error: ld returned 1 exit status
    
CMakeFiles/main.dir/build.make:172: recipe for target 'build/main' failed
    
make[3]: *** [build/main] Error 1
    
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/main.dir/all' failed
    
make[2]: *** [CMakeFiles/main.dir/all] Error 2
    
CMakeFiles/Makefile2:79: recipe for target 'CMakeFiles/main.dir/rule' failed
    
make[1]: *** [CMakeFiles/main.dir/rule] Error 2
    
Makefile:118: recipe for target 'main' failed
    
make: *** [main] Error 2

    Most people seem to give ’reinstalling x264’ as a solution. However, reinstalling x264 with the following commands leads to the same error while compiling x264 itself.

    git clone git://git.videolan.org/x264
    
cd x264
    
./configure --enable-static
    
make
    

    
/usr/bin/ld: warning: libx264.so.146, needed by /usr/local/lib/libavcodec.so, not found (try using -rpath or -rpath-link)
    
/usr/local/lib/libavcodec.so: undefined reference to `x264_encoder_open_146'
    
collect2: error: ld returned 1 exit status
    
Makefile:202: recipe for target 'x264' failed
    
make: *** [x264] Error 1

    Does anyone have an idea how I could get around this ?

  • Python & OpenCV - VideoCapture.read() always returns false

    21 août 2017, par Julen

    I need to extract frames from a video at a given time, and I’m using OpenCV for it. I’m using Linux Mint 18.1, but it must also run on Ubuntu.

    This code example is not working for me :

    import cv2
    

    
print('making screenshot from {0}'.format('/tmp/big_buck_bunny_720p_5mb.mp4'))
    

    
cap = cv2.VideoCapture(video_path)
    
cap.set(cv2.CAP_PROP_POS_MSEC,1000)
    
ret,frame = cap.read()
    
print(ret)                      # This is false
    
cv2.imwrite("image.jpg", frame) # Creates an empty file

    (I’ve checked that the path of the video is correct and that the file is not corrupted).

    I have installed the Python OpenCV 3.3.0 version :

    >>> import cv2
    
>>> cv2.__version__
    
'3.3.0'

    I’ve compiled and installed the source for OpenCV (with the WITH_FFMPEG=ON option) :

    git clone https://github.com/Itseez/opencv.git /tmp/opencv-3                                                                                                                                                                                
    
/tmp/opencv-3                                                                                                                                                                                                                            
    
mkdir -p release                                                                                                                                                                                                                            
    
cd release                                                                                                                                                                                                                                  
    
cmake -D WITH_FFMPEG=ON -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..                                                                                                                                                   
    
make                                                                                                                                                                                                                                        
    
sudo make install    

    The output of ffmpeg -version is the following :

    ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
    
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
    
libavutil      54. 31.100 / 54. 31.100
    
libavcodec     56. 60.100 / 56. 60.100
    
libavformat    56. 40.101 / 56. 40.101
    
libavdevice    56.  4.100 / 56.  4.100
    
libavfilter     5. 40.101 /  5. 40.101
    
libavresample   2.  1.  0 /  2.  1.  0
    
libswscale      3.  1.101 /  3.  1.101
    
libswresample   1.  2.101 /  1.  2.101
    
libpostproc    53.  3.100 / 53.  3.100

    What am I missing ?

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