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Sur d’autres sites (7432)

  • I can't seem to install opencv2.4.13 for Python3.4 on Mac El Capitan

    1er juin 2016, par ThatProgrammerDude

    This has been driving me nuts. I have been working on this non stop for a week. I have looked at many tutorials online they did not help.

    I have tried so much I don’t even remember what I tried. I can say the last thing I tried though.. which is this video https://www.youtube.com/watch?v=U49CVY8yOxw.

    So I download opencv2.4.13, create the build folder, open cmake, configure, generate and then go to terminal and type in make.

    I get this :

    Richie's Macbook Air:build Richie$ make
    
[  2%] Built target zlib
    
[  6%] Built target libtiff
    
[ 10%] Built target libjpeg
    
[ 14%] Built target libjasper
    
[ 16%] Built target libpng
    
[ 23%] Built target IlmImf
    
[ 26%] Built target opencv_core
    
[ 31%] Built target opencv_imgproc
    
[ 32%] Built target opencv_video
    
[ 32%] Built target opencv_flann
    
[ 32%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o
    
In file included from /Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg.cpp:45:
    
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:71:6: error: 
    
      "libswscale is necessary to build the newer OpenCV ffmpeg wrapper"
    
    #error "libswscale is necessary to build the newer OpenCV ffmpeg wrapper"
    
     ^
    
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:481:9: error: 
    
      use of undeclared identifier 'sws_freeContext'
    
        sws_freeContext(img_convert_ctx);
    
        ^
    
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:965:17: error: 
    
      use of undeclared identifier 'SWS_BICUBIC'
    
                SWS_BICUBIC,
    
                ^
    
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:998:5: error: 
    
      use of undeclared identifier 'sws_scale'
    
    sws_scale(
    
    ^
    
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:1639:46: error: 
    
      use of undeclared identifier 'SWS_BICUBIC'
    
                                             SWS_BICUBIC,
    
                                             ^
    
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:1645:14: error: 
    
      use of undeclared identifier 'sws_scale'
    
        if ( sws_scale(img_convert_ctx, input_picture->data,
    
             ^
    
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:1693:9: error: 
    
      use of undeclared identifier 'sws_freeContext'
    
        sws_freeContext(img_convert_ctx);
    
        ^
    
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:2290:9: warning: 
    
      ignoring return value of function declared with warn_unused_result
    
      attribute [-Wunused-result]
    
        avformat_write_header(oc_, NULL);
    
        ^~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~
    
1 warning and 7 errors generated.
    
make[2]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o] Error 1
    
make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2
    
make: *** [all] Error 2
    
Richie's Macbook Air:build Richie$

    From what I can see, it says

    "libswscale is necessary to build the newer OpenCV ffmpeg wrapper"

    I have tried googling though to no avail, does anyone know ?

    EDIT : I do have ffmpeg installed... (brew).

  • ffmpeg create video from a sequence of images

    1er février 2021, par t97

    I have a sequence of images as follow :

    


    img_1.png
img_2.png
img_3.png
...
img_1799.png


    


    From the documentation I run this command

    


    ffmpeg -f image2 -pattern_type glob -framerate 24 -i 'img_*.png' test-size.mp4


    


    but it doesn't generate the video correctly. I also looked online but wasn't able to find the correct command.

    


    what's the command to run to merge all the images so the output video is 30s long at 24 fps ?

    


  • Unable to play video recorded from OpenAi Environment

    10 mars 2021, par ipro_ultra

    I am developing some Reinforcement Learning algorithms in python and I am trying to record the environment into a video however I am unable to play the file once I have recorded it and it is only 1KB in size, I have tried an example I found online and this didn't work either so I assume it's a system issue rather than a problem with my code, I have enabled the debugging by running gym.logger.set_level(gym.logger.DEBUG) but this doesn't seem to through anything useful back, below is my code

    


    def replay_episode(self):
    self._env.reset()
    video_recorder = VideoRecorder(self._env, "{}/episode{}.mp4".format(self._output_directory, episode_number), enabled=True)
    for action_taken in self._current_episode_actions:
        self._env.render()
        video_recorder.capture_frame()
        self._env.step(action_taken)
    video_recorder.close()

for i in range(solution.get_episode_count()):
    # AI Stuff
    episode_number = i + 1
    solution.intialise_episode(episode_number)
    profiler.enable()
    while not solution.current_episode_done():
       solution.run_tick()
    solution.train_model()
    profiler.disable()
    export_profiling_results(profiler, '{}/episode{}.csv'.format(solution._output_directory, episode_number))


    # This is the bit we're intrested in
    if solution.current_episode_successful() or episode_number % 50 == 0:
        solution.replay_episode()

    done_time = time.time()
    print("Episode {} Completed in {}s".format(episode_number, done_time-start_time))
    start_time = done_time

solution.close()


    


    Here is the log I get from the environment when the replay_episode() method is called

    


    DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Starting ffmpeg with "ffmpeg -nostats -loglevel error -y -f rawvideo -s:v 600x400 -pix_fmt rgb24 -framerate 30 -i - -vf scale=trunc(iw/2)*2:trunc(ih/2)*2 -vcodec libx264 -pix_fmt yuv420p 
-r 30 data/1003083349/episode50.mp4"
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
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DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Capturing video frame: path=data/1003083349/episode50.mp4
DEBUG: Closing video encoder: path=data/1003083349/episode50.mp4


    


    When I attempt to play the video I get the error : This file isn't playable. That might be because the file type is unsupported, the file extension is incorrect, or the file is corrupt. 0xc10100be

    


    Thank you in advance for any responses

    


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