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pythonyoutube-dl

Postprocessing key for videovformat converting in Youtube-dl

There is an example of Postprocessing in Youtube-dl wiki page for audio extracting but I could not do the same thing for video format converting. I am aware that there are options to select the video format before downloading but sometimes my desired format isn't available so I need to convert the downloaded video file. What is the key and other parameters to be passed?

    ydl_opts = {
    'format': 'bestvideo[height<=480]+bestaudio/best[height<=480]',
    'videoformat' : "mp4",
    'outtmpl': '%(title)s.%(ext)s',
    'writethumbnail': True,
    'writesubtitles': True,
    'writeautomaticsub': True,
    'subtitleslangs': 'en',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',    #what to use for video format converting?
        'preferredcodec': 'mp3',        #what to use for video format converting?
        'preferredquality': '192',      #what to use for video format converting?
    }],
    'logger': MyLogger(),
    'progress_hooks': [my_hook],
}
with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download([video_url])
Solution

  • The available postprocessors are listed in postprocessor/__init__.py:

    ydl_opts = {
    # ...
    'postprocessors': [{
        'key': 'FFmpegVideoConvertor',
        'preferedformat': 'mp4',  # one of avi, flv, mkv, mp4, ogg, webm
    }],
}

    (A better name for that key would have been convert_to, but changing it now would needlessly break compatibility.)