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• How can I write a ffmpeg log file with Python on macOS ?

  1er septembre 2022, par Tobias

  I want to write ffmpeg log files for several video input files with a Python script on macOS.
Here is my try :

  


  def create_error_logfile(videoinput):
    cmds = [
        "/applications/ffmpeg",
        "-v", 
        "error",
        "-i",
        videoinput, 
        "-f", 
        "null", 
        "-",
        "2>",
        videoinput + ".log"
    ]
    subprocess.Popen(cmds).wait()

for root, directories, files in os.walk(input_path):
    for video in files:
        videoinput = os.path.join(root, video)
        create_error_logfile(videoinput)


  


  But I get the following ffmpeg error :

  


  Unable to find a suitable output format for '2>'
2>: Invalid argument


  


  What am I doing wrong ?
Thanks in advance !

  


• Setup FFMpegCore in Visual Studio 2019

  27 juillet 2022, par DsiakMondala

  I am confused on the basics of using a library. I understand that there is a library called FFMpeg and a wrapper called FFMpegCore so we can use FFMpeg with C#, correct ? I downloaded both FFMpeg and FFMpegCore and I have them in my project's folder. Although I didn't perceive any class named FFMpegOptions in either of the file's folders.
I am stuck on how to actually set it up so I can use it in my little project, I never downloaded someone's library before. Can somebody please walk me though the motions of connecting the three of them together ?

  


  So far I experimented with :

  


  

  • Add a reference to my project, but there doesn't seem to be any .dll, .tlb, .olb, .ocx or .exe files to add

  


  • Add an existing project to my solution. There is a project called FFMpegCore.csproj but adding it raises a missing SDK error. Weirdly enough, opening the same project as a standalone doesn't raise any issues which makes me thing the operation I am trying is inadequate.

  


  


  I am sure this is a silly and easy setup to perform but I just don't know enough to find a solution.

  


• Converting mkv file to mp4 gives me `filenotfounderror`

  8 juillet 2022, par Justin

  Here is the script being used :

  


  import os
import ffmpeg

start_dir =r'C:\Users\Videos_2'

def convert_to_mp4(mkv_file):
    name, ext = os.path.splitext(mkv_file)
    out_name = name + ".mp4"
    #ffmpeg.input(mkv_file).output(out_name, format = 'mp4', acodec ='aac', ar=16000, audio_bitrate=96000 ).run()
    ffmpeg.input(mkv_file).output(out_name, format = 'mp4', acodec ='aac', ar=16000, audio_bitrate=96000 ).run()
    print("Finished converting {}".format(mkv_file))

for path, folder, files in os.walk(start_dir):
    for file in files:
        if file.endswith('.mkv'):
            print("Found file: %s" % file)
            convert_to_mp4(os.path.join(start_dir, file))
        else:
            pass


  


  It is similar to the following : Converting mkv files to mp4 with ffmpeg-python

  


  It gives me the error FileNotFoundError: [WinError 2] The system cannot find the file specified on the line convert_to_mp4(os.path.join(start_dir, file)). From the link provided it says to fix the problem "Make sure ffmpeg.exe is in the same directory as the script." However I do not understand exactly what that means. I downloaded ffmpeg through the terminal window in the environment that I am using.