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• python ffmpeg "The system cannot find the file specified" [on hold]

  5 avril 2016, par k7zheng

  I’m pretty new to Python but I’ve been stuck on this for a while.

  Whenever I run :

  import subprocess, os
  
  os.ffmpeg = "/absolute/path/to/ffmpeg"
  
  subprocess.ffmpeg = "/absolute/path/to/ffmpeg"
  
  
  
  subprocess.call(['ffmpeg', '-i', 'C://Users//k7zheng//Desktop//A1//1.avi', '-r', '0.05', "newfiles//%02d.png"])

  I get the following :

  Traceback (most recent call last):
  
  File "C:/Users/k7zheng/Desktop/FT1.py", line 4, in <module>
  
  subprocess.call(['ffmpeg -i C:\\Users\k\Desktop\A1\1.avi -r 0.05 "newfiles\%02d.png"'])
  
  File "C:\Python34\lib\subprocess.py", line 537, in call with Popen(*popenargs, **kwargs) as p:
  
  File "C:\Python34\lib\subprocess.py", line 859, in __init__
  
  restore_signals, start_new_session)
  
  File "C:\Python34\lib\subprocess.py", line 1114, in _execute_child
  
  startupinfo)
  
  FileNotFoundError: [WinError 2] The system cannot find the file specified
  
  </module>

  Can you help me spot my issue ?
  I’ve tried :

  • changing slashes / to \ to double \ slashes
  • getting rid of the 2nd and 3rd lines
  • adding os.chdir(r"C :\software\ffmpeg\ffmpeg-20160330-git-be746e-win64-static\bin")
  • changing line 4 to subprocess.call(’ffmpeg -i c :\users\k7zheng\desktop\c1\1 -r -0.05 "newfiles\%02d.png"’, shell=True)

  I’m running Python 3.4.4

• "The system cannot find the file specified" when animating with ffmpeg in matplotlib

  27 novembre 2019, par algol

  I am trying to generate a movie from a stack of numpy arrays using a function I have used on a different computer (a mac) on my home computer (Windows 10). Here is the function that I am using :

  def make_animation(frames,name): 
  
  
  
      plt.rcParams['animation.ffmpeg_path'] = u'C:\ffmpeg-20190320-0739d5c-win64-static\bin\ffmpeg.exe' 
  
      n_images=frames.shape[2] 
  
      assert (n_images>1)   
  
      figsize=(10,10)
  
      fig, ax = plt.subplots(figsize=figsize)
  
      fig.tight_layout()
  
      fig.subplots_adjust(left=0, bottom=0, right=1, top=1, wspace=None, hspace=None)
  
      #lineR, = ax.plot(xaxis_data[0],R_data[0],'c-',label="resources")
  
      img = ax.imshow(frames[:,:,0], animated = True)   
  
  
  
  
  
      def updatefig(img_num): 
  
  
  
          #lineR.set_data(xaxis_data[img_num],R_data[img_num],'r-')
  
  
  
          img.set_data(frames[:,:,img_num])
  
  
  
          return [img]
  
  
  
  
  
      ani = animation.FuncAnimation(fig, updatefig, np.arange(1, n_images), interval=50, blit=True)
  
      mywriter = animation.FFMpegWriter(fps = 20)
  
      #ani.save('mymovie.mp4',writer=mywriter)
  
  
  
      ani.save(f"D:\{name}.mp4",writer=mywriter)
  
  
  
      plt.close(fig)

  Here is the error that I am getting :

  Traceback (most recent call last):
  
  
  
    File "", line 1, in <module>
  
      make_animation(stack,'full_test')
  
  
  
    File "", line 27, in make_animation
  
      ani.save(f"D:\{name}.mp4",writer=mywriter)
  
  
  
    File "C:\Users\~snip~\Anaconda3\lib\site-packages\matplotlib\animation.py", line 1136, in save
  
      with writer.saving(self._fig, filename, dpi):
  
  
  
    File "C:\Users\~snip~\Anaconda3\lib\contextlib.py", line 112, in __enter__
  
      return next(self.gen)
  
  
  
    File "C:\Users\~snip~\Anaconda3\lib\site-packages\matplotlib\animation.py", line 228, in saving
  
      self.setup(fig, outfile, dpi, *args, **kwargs)
  
  
  
    File "C:\Users\~snip~\Anaconda3\lib\site-packages\matplotlib\animation.py", line 352, in setup
  
      self._run()
  
  
  
    File "C:\Users\~snip~\Anaconda3\lib\site-packages\matplotlib\animation.py", line 363, in _run
  
      creationflags=subprocess_creation_flags)
  
  
  
    File "C:\Users\~snip~\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 143, in __init__
  
      super(SubprocessPopen, self).__init__(*args, **kwargs)
  
  
  
    File "C:\Users\~snip~\Anaconda3\lib\subprocess.py", line 775, in __init__
  
      restore_signals, start_new_session)
  
  
  
    File "C:\Users\~snip~\Anaconda3\lib\subprocess.py", line 1178, in _execute_child
  
      startupinfo)
  
  
  
  FileNotFoundError: [WinError 2] The system cannot find the file specified
  
  </module>

  I know this code basically works since I have used it before on another computer. My guess is that something about ffmpeg is messed up or something about the output path is wrong. I’m not sure what could be wrong with the ffmpeg since I definitely have it installed (via conda) and the path is pretty straightforward. On the other hand I’m not sure what could be wrong with the output path.

• avformat/avformat : Remove redundant "NOT PART OF PUBLIC API"

  18 mars 2020, par Andreas Rheinhardt

  avformat/avformat : Remove redundant "NOT PART OF PUBLIC API"
  AVStream.request_probe as well as AVStream.mux_ts_offset are below the
  
  separator of public and private fields, so that a further "NOT PART OF
  
  PUBLIC API" is redundant.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/avformat.h