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• NaCl with FFmpeg, avformat_open_input return -5 and -1052488119 [duplicate]

  30 July 2013, by Jar

  This question is an exact duplicate of:

  • avformat_open_input return value, error code

  I'm trying to port FFmpeg into my NaCl module.

  So far, my module linked ffmpeg and SDL libraries.

  It already can play YUV format video which is directed load into memory and copy into YUVOverlay buffer (it's very easy).

  Now, I want to use ffmpeg to decode video, but when I call the function avformat_open_input it returns -5 when input is URL string, such as rtmp:// or mmsh://; it returns -1052488119 when input is file name, such as /saved/tmp (I mount the file system - html5fs).

  ---

  There are some questions:

  1. What means of -5 and -1052488119?
  2. If file can't open by avformat_open_input, is it possible the input type is from buffer not from file name or url string?

  ---

  If I'm not clearly about my question or description, you can tell me.
  If you are doing the same thing or having the same problem, we can discuss together.

  Thanks,
  Jar

• qt-faststart: Fix the signedness of variables keeping the ftello return values

  29 October 2012, by Michael Niedermayer

  qt-faststart: Fix the signedness of variables keeping the ftello return values
  These variables are assigned the return values of ftello, which
  
  returns an off_t, which is a signed type. On errors, ftello returns
  
   1, thus make sure this error return value can be stored properly.
  Signed-off-by: Martin Storsjö <martin@martin.st>
  

  • [DBH] tools/qt-faststart.c

• PySceneDetect FFmpeg Not Available

  14 August 2023, by Dmitriy Pushkarev

  I already installed FFmpeg and this is available in terminal I can convert video and etc, but it's completely not available in PySceneDetect.

  


  pip installed FFmpeg-python and FFmpeg library and FFmpeg itself in system.

  


  PySceneDetect returns:

  


  ffmpeg could not be found on the system. Please install ffmpeg to enable video output support.


  


  I think trouble with path, but can't put path in PySceneDetect. I can use path to binary FFmpeg, only in ffmpeg-python library, like this and it's working

  


  This code working fine:

  


  Here i using only FFmpeg-python library

  


  stream = ffmpeg.input('vi0.mp4')
stream = ffmpeg.filter(stream, 'fps', fps=10, round='up')
stream = ffmpeg.output(stream, 'vi1.mp4')
ffmpeg.run(stream,cmd='./ffmpeg')


  


  But can't it to get work with PySceneDetect

  


  print(scenedetect.video_splitter.is_ffmpeg_available())


  


  return False

  


  split_video_ffmpeg(video_path, scene_list, show_progress=False)


  


  returns "ffmpeg could not be found on the system. Please install ffmpeg to enable video output support."