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• Download from YouTube as ".wav" instead of ".webm"

  11 août 2022, par Bastian Gerjol

  I am trying to extract an audio from a YouTube Video as an .wav file.
However, the script that I am running keeps giving me .webm files.
The code I am using is the following :

  


  from __future__ import unicode_literals
import youtube_dl

ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'wav',
        'preferredquality': '192'
    }],
    'postprocessor_args': [
        '-ar', '16000'
    ],
    'prefer_ffmpeg': True,
    'keepvideo': True
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['https://www.youtube.com/watch?v=2Xq7iJKzhR4'])


  


  Is there a way to change the output and keep the highest possible audio quality ?

  


  I tried setting prefer_ffmpeg': True to False & keepvideo': True to False but that did not change anything.

  


  I would appreciate suggestions and please keep in mind that I never used Python before.

  


• RTSP Streaming on HTML page [on hold]

  20 décembre 2018, par Sajal Gupta

  I’m streaming from my IP Camera via RTSP protocol and able to watch live stream on VLC Player but I want to receive this stream in Java Code and save it into a file and also stream it on HTML page simultaneously. I tried using multiple plugins which are either unable to transcode or read RTSP URL. I also tried to read this stream via inputStream but getting null from it. I also tried websocket to listen to this stream but websocket is also returning null. I’m able to create file using ffmpeg from terminal but I want to do this through Java Code. I used vlcj library in java but it is also returning a deadlock error. Streamedian is paid and VXG Media Player is stuck on loader forever.
  Is there a way to stream and save RSTP stream simultaneously via Java/Grails code ?

• ffmpeg reduce mp4 size errors : 'Unknown encoder libx264' and 'Unable to find a suitable output format for'

  25 juillet 2018, par martins

  I am quite new to ffmpeg and video editing. I try to reduce the size of various mp4 files. I followed a pretty straightforward tutorial (link) and also copy the audio. In Terminal (Mac user) I write :

  ffmpeg -i inputfile.mp4 -c:a copy -c:v libx264 -crf 24 outputfile.mp4

  The error here is : Unknown encoder 'libx264' and even when I omit the ’libx264’ from the code above, it still gives me the following error : [NULL @ 0x7f9a21814c00] Unable to find a suitable output format for '24' 24: Invalid argument

  As long as I know, 24 is a totally valid value for crf. Of course I tried with others (20, 14, 30) and the error is still there.

  I would very much appreciate a bit of guidance. Thanks for your time in advance.