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• How to eliminate the distortion in live streaming Nodejs + ffmpeg

  16 août 2015, par hackmith

  I tried Live video Streaming with NodeJS and ffmpeg encoder. It works with a lag of around 2sec and with a distortion as well. Lag does not matter as there is always. But I need to eliminate the video distortion as much as possible. So what would be the suitable bit rates and is there a better encoder to do this ? In ffmpeg, it encodes to mpegts so is there a more preferable format than mpegts ? plz help

  my encoding code was

  ffmpeg -s 640x480 -f dshow -i video="HP HD Webcam":audio="Microphone (Realtek High Definition Audio)" -preset ultrafast -qp 0 -f mpegts -v:b 800 -r 100 http://localhost:8082/abc/640/480/

• How to stream video with ffmpeg and node express

  8 septembre 2019, par Sourav Golui

  Node.js Code. I am trying to stream a high definition video to mobile video

  var constVideoUrl = 'uploads/videos/q1080/';
  
  app.get('/video', function(req, res) {
  
     res.contentType('flv');
  
  
  
     var pathToMovie = constVideoUrl + 'video-1567925616174.mp4';
  
     var proc = ffmpeg(pathToMovie)
  
       .size('320x200')
  
       .preset('flashvideo')
  
  
  
       .on('end', function() {
  
         console.log('file has been converted succesfully');
  
       })
  
       .on('error', function(err) {
  
         console.log('an error happened: ' + err.message);
  
       })
  
      .pipe(res, {end:true});
  
   });

  I used it as a video url

  <video controls="controls">
  
      <source src="http://localhost:3000/video">
  
  </source></video>

• Adding mp3 metadata with space in ffmpeg using bash [duplicate]

  15 septembre 2019, par ctrlnot

  This question already has an answer here :

  • When to wrap quotes around a shell variable ?
    
    5 answers
    

  I have this bash script on downloading youtube videos then convert it to mp3 using youtube-dl and ffmpeg.

  #!/bin/bash
  
  
  
  ytlink=""
  
  outputFileName=""
  
  title=""
  
  artist=""
  
  album=""
  
  
  
  while getopts l:o:t:r:b: flag; do
  
    case "${flag}" in
  
      l) ytlink="${OPTARG}";;
  
      o) outputFileName="${OPTARG}";;
  
      t) title="${OPTARG}";;
  
      r) artist="${OPTARG}";;
  
      b) album="${OPTARG}";;
  
    esac
  
  done
  
  
  
  youtube-dl "$ytlink" --add-metadata --extract-audio --audio-format mp3 --output "temp.%(ext)s"
  
  
  
  tempFilename="temp.mp3"
  
  outputFileName="$outputFileName.mp3"
  
  
  
  args+=("-i" "$tempFilename" "-metadata" "title='$title'" "-metadata" "artist='$artist'" "-metadata" "album='$album'" "-metadata" "comment=Source:$ytlink")
  
  ffmpeg -loglevel debug ${args[@]} -acodec copy "$outputFileName"
  
  rm "$tempFilename"

  This script is fine if I have one word title/artist/album. However, if I have a space, ffmpeg interprets each word before space as another parameter. This is how I use this on command line :

  ./yttomp3.sh -l "https://www.youtube.com/watch?v=KwQnSHAilOQ" -o "Lee - Autumn Day" -t "Autumn Day" -r "Lee" -b "(Free) Lo-fi Type Beat - Autumn Day"

  The debug output of ffmpeg :

  Splitting the commandline.
  
  Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
  
  Reading option '-i' ... matched as input url with argument 'temp.mp3'.
  
  Reading option '-metadata' ... matched as option 'metadata' (add metadata) with argument 'title='Autumn'.
  
  Reading option 'Day'' ... matched as output url.
  
  Reading option '-metadata' ... matched as option 'metadata' (add metadata) with argument 'artist='Lee''.
  
  Reading option '-metadata' ... matched as option 'metadata' (add metadata) with argument 'album='(Free)'.
  
  Reading option 'Lo-fi' ... matched as output url.
  
  Reading option 'Type' ... matched as output url.
  
  Reading option 'Beat' ... matched as output url.
  
  Reading option '-' ... matched as output url.
  
  Reading option 'Autumn' ... matched as output url.
  
  Reading option 'Day'' ... matched as output url.
  
  Reading option '-metadata' ... matched as option 'metadata' (add metadata) with argument 'comment=Source:https://www.youtube.com/watch?v=KwQnSHAilOQ'.
  
  Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'copy'.
  
  Reading option 'Lee - Autumn Day.mp3' ... matched as output url.
  
  Finished splitting the commandline.

  I tried enclosing the arguments to quotes on the script but it’s still not working. How should I deal with this ? Thanks.