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    13 avril 2011

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    Mediaspip core
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  • I'm using the following code to convert YouTube videos into audio but getting error despite installing ffmpeg

    31 décembre 2020, par Umar Iqbal

    This is the code I'm using and the error I'm getting :

    


    Code :

    


    from future import unicode_literals
import youtube_dl

    


    ydl_opts = 
'format' : 'bestaudio/best',
'postprocessors' : [
'key' : 'FFmpegExtractAudio',
'preferredcodec' : 'mp3',
'preferredquality' : '192',
],


    


    with youtube_dl.YoutubeDL(ydl_opts) as ydl :
ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc' ;])

    


    Error :

    


    DownloadError : ERROR : ffprobe/avprobe and ffmpeg/avconv not found.

    


  • ffmpeg webcam capture a/v out of sync

    7 juillet 2014, par Cameron Ball

    I’m running this command to capture video and audio from my webcam :

    ffmpeg -y -f video4linux2 -s 320x240 -i /dev/video0 -f alsa -i "plughw:CARD=U0x46d0x825,DEV=0" -ac 2 -strict experimental Filename.mp4

    It works, but the audio is about half a second behind the video (EG if I clap, when I watch the video I’ll hear the clap and then see me do it).

    This is for an online stream, so I can’t fix it up later, it needs to be recorded correctly.

    It always seems to be off by the same amount, so I’m trying to find an option to simply delay when audio starts recording, but I can’t figure it out.

    Any ideas ?

  • ffmpeg multiple instances

    2 décembre 2011, par Julian Gardner

    New to linux and having problems.

    I am trying to setup a system that will allow me to start multiple ffmpegs to convert live tv so I can archive certain programs. The source is a few tv cards which means I can encode multiple streams at the same time, pc is an i7 8 core.

    I have tried to write a program that uses threads to start multiple ffmpegs and capture all the ffmpeg messages so I can watch the time elapsed, and when this hits a predetermined time stops the task and ffmpeg and then waits for the next scheduled recording, but I'm stuck on the capture of the ffmpeg output.

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