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• Unable see video after encoding it using ffmpeg

  22 septembre 2015, par Sharathreddy

  I have used ffmpeg for video encoding using following parameters.

  ffmpeg -i movie.mov -c:v libx264 -preset slow -b:v 500k -maxrate 500k -bufsize 1000k -s 480x360 -acodec libvo_aacenc -b:a 128k -async 1 -movflags faststart -y movie.mp4

  "movie.mov" successfully encoded and created "movie.mp4".
  But when I play movie.mp4 in windows media player or android player, blank screen appears but the movie is playing since I’m able hear audio.
  Is there any way to re-encode movie.mp4 so that I can get video.

• How do I edit the PKG_CONFIG_PATH environment variable on windows ?

  2 janvier 2024, par Project PowerPoint

  I'm trying to use pkg-config to combine files from ffmpeg into a library so I can use them as such in my program. However, I can't seem to figure out how to get pkg-config to look in another location.

  


  It's worth mentioning that I'm compiling this program into a node API addon for a node project, so I'm using pkg-config from NPM and CMake-js.

  


  Currently, pkg-config looks in C:/Strawberry/c/lib/pkgconfig

  


  I want it to look in C:/ffmpeg/lib/ as well.
I've tried looking for how to do this, but I can only find how to do it on linux.

  


  In the one stackoverflow question which is similar, the link provided is broken : link to question , broken link provided

  


  Otherwise, I find conflicting info saying pkg-config in windows doesn't consider PKG_CONFIG_PATH environment variable. I can't test this if I can't find out how to actually do it.

  


  I've also tried copying the ffmpeg folder inside C:/Strawberry/c/lib/pkgconfig so it can find it. Even then, it 'cant find libavcodec.pc' despite being located in that folder (albeit several folders deep).

  


  How do I change the environment variable for pkg-config ?

  


• Strange error with ffmpeg and unoconv in python script

  27 mai 2015, par Avery Ripoll Crocker

  I am creating a python script that can be used by other people to convert files. However when I use this script I keep getting a weird error when I run the subprocess for unoconv, this error is :

  Traceback (most recent call last):
  
    File "conversion.py", line 15, in <module>
  
      check_call(["unoconv", "-f", Fileextension, filename])
  
    File "/usr/lib/python2.7/subprocess.py", line 540, in check_call
  
      raise CalledProcessError(retcode, cmd)
  
  subprocess.CalledProcessError: Command '['unoconv', '-f', '.pdf', 'journal.doc']' returned non-zero exit status 1
  
  </module>

  I have looked through various resources for this, but the one answer I have been receiving is that I must have set up the unoconv line incorrectly. I have checked several times that the code is correct, and it is. The other peculiar thing is that my code for ffmpeg works. Does anybody have an idea as to why this happens.

  Here is my program :

  print "If at any point you wish to quit the program hit Ctrl + C"
  
  
  
  filetype = raw_input("What kind of file would you like to convert? Audio, Image, Video or Document: ")
  
  
  
  if filetype == "Document":
  
     path = raw_input("Please drag and drop the directory in which the file is stored into the terminal:")
  
     os.chdir(path[1:-2])
  
     filename = raw_input("Please enter the name of the file you would like to convert, including the file-type. e.g. test.txt, however please do make sure that the file-name does not have any spaces:")
  
     Fileextension = raw_input("What filetype would you like the program to convert your file to. E.g. .txt: ")
  
     from subprocess import check_call
  
     check_call(["unoconv", "-f", Fileextension, filename])
  
  
  
  elif filetype == "Audio":
  
     path = raw_input("Please drag and drop the directory in which the file is stored into the terminal:")
  
     os.chdir(path[1:-2])
  
     filename = raw_input("Please enter the name of the file you would like to convert, including the file-type. e.g. test.txt, however please do make sure that the file-name does not have any spaces:")
  
     Fileextension = raw_input("What filetype would you like the program to convert your file to. E.g. .mp3: ")
  
     body, ext = os.path.splitext("filename")
  
     from subprocess import check_call
  
     check_call(["ffmpeg" ,"-i", filename, body + Fileextension])
  
  
  
  elif filetype == "Video":
  
     path = raw_input("Please drag and drop the directory in which the file is stored into the terminal:")
  
     os.chdir(path[1:-2])
  
     filename = raw_input("Please enter the name of the file you would like to convert, including the file-type. e.g. test.txt, however please do make sure that the file-name does not have any spaces:")
  
     Fileextension = raw_input("What filetype would you like the program to convert your file to. E.g. .mp4: ")
  
     body, ext = os.path.splitext("filename")
  
     from subprocess import check_call
  
     check_call(["ffmpeg" ,"-i", filename, body + Fileextension])
  
  
  
  elif filetype == "Image":
  
     path = raw_input("Please drag and drop the directory in which the file is stored into the terminal:")
  
     os.chdir(path[1:-2])
  
     filename = raw_input("Please enter the name of the file you would like to convert, including the file-type. e.g. test.txt, however please do make sure that the file-name does not have any spaces:")
  
     Fileextension = raw_input("What filetype would you like the program to convert your file to. E.g. .Jpeg: ")
  
     body, ext = os.path.splitext("filename")
  
     from subprocess import check_call    
  
     check_call(["ffmpeg" ,"-i", filename, body + Fileextension])