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• FFMPEG - overlaying 4 videos not working, 2 videos is working perfectly

  31 octobre 2019, par Taapo

  I’ve been trying to overlay videos using ffmpeg.

  Pretty simple, using ProRes 4444 (with alpha channel).

  When I overlay two videos, there is no problem.

  When I try to overlay more than two, it only shows the first two entries. Is FFMPEG only capable of overlaying two videos ?

  ffmpeg.exe -y \
  
  -i test-transparent-03.mov \
  
  -i test-transparent-04.mov \
  
  -i test-transparent-02.mov \
  
  -i test-transparent-01.mov \
  
  -filter_complex overlay -c:v libx264 output.mp4 

  This command is working perfectly :

  ffmpeg.exe -y \
  
  -i test-transparent-03.mov \
  
  -i test-transparent-04.mov \
  
  -filter_complex overlay -c:v libx264 output.mp4 

• Opencv is working for my project on my laptop but stop working on raspberry pi

  10 mars 2021, par Clovis Tiwange

  Good morning all ! I despair (This is my first post).
I am trying to set up a human detection system using the openvino toolkit. I am using an example project provided by openvino at the following openvino multi target tracking. I first tested them on my computer (ubuntu) and it worked. I have now tried to run the project on raspberry pi but it gets stuck at opencv level. I followed the following tutorial Install openvino on rasbian for setting up openvino.
While debugging, I realized that the problem was with cv2.videocapure (link). Apparently there is a problem with the backend ffmepg but also GStreamer.

  


  I run the following command

  


  python3 multi_camera_multi_target_tracking.py     -i http://192.168.137.160:4747/video    --m_detector model/intel/person-detection-retail-0013/FP32/person-detection-retail-0013.xml     --m_reid model/intel/person-reidentification-retail-0031/FP32/person-reidentification-retail-0031.xml     --config config.py -l /opt/intel/openvino/deployment_tools/inference_engine/lib/intel64/libcpu_extension_avx2.so


  


  And i have the following results

  


  INFO: 2021-03-07 21:07:34: Opening file http://192.168.137.160:4747/video
[DEBUG:0] global ../opencv/modules/videoio/src/videoio_registry.cpp (171) VideoBackendRegistry VIDEOIO: Builtin backends(8): FFMPEG(1000); GSTREAMER(990); INTEL_MFX(980); MSMF(970); V4L2(960); CV_IMAGES(950); CV_MJPEG(940); UEYE(930)

[DEBUG:0] global ../opencv/modules/videoio/src/videoio_registry.cpp (195) VideoBackendRegistry VIDEOIO: Available backends(8): FFMPEG(1000); GSTREAMER(990); INTEL_MFX(980); MSMF(970); V4L2(960); CV_IMAGES(950); CV_MJPEG(940); UEYE(930)

[ INFO:0] global ../opencv/modules/videoio/src/videoio_registry.cpp (197) VideoBackendRegistry VIDEOIO: Enabled backends(8, sorted by priority): FFMPEG(1000); GSTREAMER(990); INTEL_MFX(980); MSMF(970); V4L2(960); CV_IMAGES(950); CV_MJPEG(940); UEYE(930)

[ WARN:0] global ../opencv/modules/videoio/src/cap.cpp (108) open VIDEOIO(FFMPEG): trying capture filename='http://192.168.137.160:4747/video' ...

[ INFO:0] global ../opencv/modules/videoio/src/backend_plugin.cpp (359) getPluginCandidates VideoIO pluigin (FFMPEG): glob is 'libopencv_videoio_ffmpeg*.so', 1 location(s)

[ INFO:0] global ../opencv/modules/videoio/src/backend_plugin.cpp (366) getPluginCandidates     - /opt/intel/openvino/opencv/lib: 1

[ INFO:0] global ../opencv/modules/videoio/src/backend_plugin.cpp (370) getPluginCandidates Found 1 plugin(s) for FFMPEG

[ INFO:0] global ../opencv/modules/videoio/src/backend_plugin.cpp (175) libraryLoad load /opt/intel/openvino/opencv/lib/libopencv_videoio_ffmpeg.so => FAILED

[ WARN:0] global ../opencv/modules/videoio/src/cap.cpp (170) open VIDEOIO(FFMPEG): backend is not available (plugin is missing, or can't be loaded due dependencies or it is not compatible)

[ WARN:0] global ../opencv/modules/videoio/src/cap.cpp (108) open VIDEOIO(GSTREAMER): trying capture filename='http://192.168.137.160:4747/video' ...

[ INFO:0] global ../opencv/modules/videoio/src/backend_plugin.cpp (359) getPluginCandidates VideoIO pluigin (GSTREAMER): glob is 'libopencv_videoio_gstreamer*.so', 1 location(s)

[ INFO:0] global ../opencv/modules/videoio/src/backend_plugin.cpp (366) getPluginCandidates     - /opt/intel/openvino/opencv/lib: 1

[ INFO:0] global ../opencv/modules/videoio/src/backend_plugin.cpp (370) getPluginCandidates Found 1 plugin(s) for GSTREAMER

[ INFO:0] global ../opencv/modules/videoio/src/backend_plugin.cpp (175) libraryLoad load /opt/intel/openvino/opencv/lib/libopencv_videoio_gstreamer.so => OK

[ INFO:0] global ../opencv/modules/videoio/src/backend_plugin.cpp (236) PluginBackend Video I/O: loaded plugin 'GStreamer OpenCV Video I/O plugin'

[ INFO:0] global ../opencv/modules/videoio/src/cap_gstreamer.cpp (711) open OpenCV | GStreamer: http://192.168.137.160:4747/video

[ INFO:0] global ../opencv/modules/videoio/src/cap_gstreamer.cpp (744) open OpenCV | GStreamer: mode - URI


  


  The program seems to be stuck there. No exception is thrown.

  


• Need Help PRO ffmpeg Python input multi video type in folder for overlay logo and output to only mp4 with same or random name please

  29 août 2021, par noobherepleasehelpme

  I need help please
I'm new to python and ffmpeg.

  


  Now I use this basic command To use ffmpeg add a logo overlay to the video file.

  


  import ffmpeg
main = ffmpeg.input('1.mkv')
logo = ffmpeg.input('logo.png')
(
    ffmpeg
    .filter([main, logo], 'overlay', 10, 10)
    .output('2.mp4')
    .run(overwrite_output=True)
)



  


  It works very well, I found it on here.
But is it possible to have ffmpeg to input all mp4 or mkv files in a folder ?

  


  or command ffmpeg Find all types of video files in the folder. (if possible)

  


  and insert the logo with filter overlay as usual

  


  and output to the original file name or random name

  


  thanks please help me