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• Convert a video to mp3 in python without ffmpeg

  13 octobre 2020, par Breno Henrique

  I have some problems when I tryed to convert a video to music in python with moviepy and the prompt given me a error, because this library need ffmepg, so I can't install ffmepg, because now only have the x64 version to download, and now I have this problem, and I thinking what is the other way to install the ffmepg or convert a video to music ! Can someone help-me, Thanks !

  


  Code to convert :

  


  with VideoFileClip(mp4f) as vc:
    with vc.audio as ac:
        ac.write_audiofile(mp3f)


  


  Error :

  


  OSError: MoviePy error: the file X could not be found!
Please check that you entered the correct path.


  


  System details :
Python - 3.8.6
Windows 10 Pro x86

  


• Problems with using on user computers without ffmeg

  8 janvier 2021, par DevilPD

  My Python program uses ffmpeg. However, if ffmeg was installed on your computer at the time of deployment and is not configured or does not exist in a directory such as the exe file, it will not work normally. If my program has to use ffmpeg while running, I would like to use it in the same folder in the library folder. What should I do ?

  


    try:
        for i in sp_text:
            try:
                output_dir = os.path.join('./', '%(playlist_title)s', '%(playlist_index)s. %(title)s.%(ext)s')

                download_list = [
                    i,
                ]

                ydl_opt = {
                    'outtmpl': output_dir,
                    'format': 'bestaudio/best',
                    'postprocessors': [{
                        'key': 'FFmpegExtractAudio',
                        'preferredcodec': 'mp3',
                        'preferredquality': '192',
                    }, {'key': 'FFmpegMetadata'}, ],
                }

                with youtube_dl.YoutubeDL(ydl_opt) as ydl:
                    ydl.download(download_list)

                self.lbl.setText('Success!')
            except:
                self.lbl.setText('Error1')
    except:
        self.lbl.setText('Error2')


  


• ffmpeg audio/video sync problems when uploading to WhatsApp

  11 janvier 2021, par Luke Collins

  (Note : I have looked at related questions such as this one, but the solutions there didn't work for me since presumably their output files wouldn't play correctly in mpv, whereas mine do.)

  


  I want to send a scene from a film to my friend on WhatsApp. I run

  


  


  ffmpeg -i film.mp4 -ss 00:25:30 -t 00:03:00 -c: copy out.mp4

  


  


  to extract the clip, which produces the file out.mp4 which plays fine when I play it with mpv.

  


  If instead, I play the file in my browser (firefox), the first frame is static for a couple of seconds while audio plays, until the video starts and the video and audio are both in sync. (In other words, it seems the file has additional unnecessary audio information appended to the beginning of the file, which starts before my desired clip when played in firefox).

  


  Diagrammatically, I suspect the video contains the following information :

  


  

  


  and firefox plays it in this way :

  


  

  


  What's worse is that when I upload it to WhatsApp, it misaligns the audio with the video, instead playing it this way :

  


  

  


  How can I fix this so that the video has no additional video/audio information ?

  


  I appreciate any help with this.