Recherche avancée

Sur d’autres sites (7125)

• Python script that will take a sequence of images and turn it into a video or gif/animation ?

  6 juillet 2017, par Aang

  I know there are a few questions on this already but I have yet to find a complete solution to this problem. I am writing in Python 2.5 and I want to be able to write a script that will take a sequence of images and turn it into a video or gif/animation.

  I have already tried imageio, image2gif, and opencv. Opencv gives me import errors, imageio only works on Python 2.6+, and image2gif gives me errors when I try to import the PIL or pillow Python library.

  I’ve also looked into FFMPEG. Using the subprocess python module to run FFMPEG through the terminal, I got it to work. However, I am looking for a solution that uses a python library and not an external program such as FFMPEG. Any suggestions ?

• FFMPEG - can you have comments in script files ?

  23 juillet 2024, par rossmcm

  Because of batch's poor ability to handle multi-line strings, I'm using FFMPEG script files more and more for filter_complex arguments. I'm wondering if there is any way to include comments in these files. They seem to be quite tolerant of white space and line breaks. I've tried :

  


  #
#   comment
#


  


  and

  


  ;
;   comment
;


  


  and

  


  `
`   comment
`


  


  and

  


  '
'   comment
'


  


  with no success. It doesn't look as if comments are officially supported, but I'm wondering of there is some syntax quirk that allows them ?

  


  *** CLARIFICATION ***

  


  I'm not talking about comments in batch files here, but comments in filter_complex_script files. FFMPEG supports specifying the filter_complex argument string in a separate file. So instead of :

  


  ffmpeg -i "input.mp4" -filter_complex "[0:v] crop=w=100:h=100:x=12:y=34 " "output.mp4"


  


  you can specify :

  


  ffmpeg -i "input.mp4" -filter_complex_script "crop.txt" "output.mp4"


  


  where crop.txt contains

  


  [0:v] crop=w=100:h=100:x=12:y=34


  


  This is really handy when the filter_complex string gets more complicated (I routinely deal with arguments 10,000 characters in length).

  


• Converting .mp3 to wav in python script

  25 décembre 2016, par DhruvArora

  I am trying to create spectograms of audio files for a speech recognition project. For the same, I am using a command line tool called ffmpeg to convert mp3 to wav. I am using the os.system() command in my python script but it does not work. The same command works perfectly fine on the terminal. What can be the possible issue ?

  PS : I have also tried the subprocess package and ffmpeg is in my $PATH.

  Traceback (most recent call last):
  
   File "/Users/dhruvarora/Documents/test.py", line 7, in <module>
  
     subprocess.call(['ffmpeg','-i','./Users/dhruvarora/Documents/0a0p10uya0h.mp3','tmpsue1234.wav'])
  
   File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 523, in call
  
     return Popen(*popenargs, **kwargs).wait()
  
   File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 711, in __init__
  
     errread, errwrite)
  
   File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1343, in _execute_child
  
     raise child_exception
  
  OSError: [Errno 2] No such file or directory
  
  </module>