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• How to run the ffmpeg command using node.js ?

  12 juillet 2019, par Sachin Shah

  In node, When I got the request from /playMovie from App, I need to broadcast the video.

  When I execute this command in terminal it works fine.

  ffmpeg -re -i movie.mkv  -c:v libx264 -preset superfast -tune zerolatency -c:a aac -ar 44100 -f flv rtmp://192.168.1.13/live/myStream

  Now I’m going to setup this dynamic.

  app.use('/playMovie', function (req, res) {
  
    console.log("playMovie...");
  
    let filePaht = 'movie.mkv';
  
    let fileName = 'marvel-avengers';
  
  
  
    let ffmpeg = spawn(`ffmpeg -re -i ${filePaht}  -c:v libx264 -preset 
  
      superfast -tune zerolatency -c:a aac -ar 44100 -f flv 
  
  rtmp://192.168.1.13/live/${fileName}`);
  
       ffmpeg.on('exit', (statusCode) => {
  
     console.log("statusCode ::::::::::::::::::::::::::::::::: ",statusCode);
  
     if (statusCode === 0) {
  
        console.log('conversion successful')
  
     }
  
   })
  
  
  
  ffmpeg
  
    .stderr
  
    .on('data', (err) => {
  
      console.log('err:', new String(err))
  
    })
  
  }); 

  Refrence Link

  While run the app I got this error.

  playMovie...
  
  12/07/2019 15:27:17 31722 [ERROR] uncaughtException { Error: spawn ffmpeg -re -i movie.mkv  -c:v libx264 -preset superfast -tune zerolatency -c:a aac -ar 44100 -f flv rtmp://192.168.1.13/live/marvel-avengers ENOENT
  
  at _errnoException (util.js:1022:11)
  
  at Process.ChildProcess._handle.onexit (internal/child_process.js:190:19)
  
  at onErrorNT (internal/child_process.js:372:16)
  
  at _combinedTickCallback (internal/process/next_tick.js:138:11)
  
  at process._tickCallback (internal/process/next_tick.js:180:9)
  
  code: 'ENOENT',
  
  errno: 'ENOENT',
  
  syscall: 'spawn ffmpeg -re -i movie.mkv  -c:v libx264 -preset superfast -tune zerolatency -c:a aac -ar 44100 -f flv 
  
  rtmp://192.168.1.13/live/marvel-avengers',
  
  path: 'ffmpeg -re -i movie.mkv  -c:v libx264 -preset superfast -tune zerolatency -c:a aac -ar 44100 -f flv rtmp://192.168.1.13/live/marvel-avengers',
  
  spawnargs: [] }

• FFMPEG, AVCONV:Overylaying multiple videos with offset

  4 novembre 2014, par user1064504

  I am trying to overlay multiple videos in a split screen, with different offset (Audio, video both offset), initially I tried offsetting & overlaying like following

  avconv -i 1.webm -itsoffset 2 -s 640x480 -vf "movie=1.webm, scale=320:480 [vid2]; [vid2] overlay=0:0 [basis1]; [basis1][1] overlay=320:0" splitScreenOut.mp4 

  & overlayed videos being offset by :

  movie=overlay.avi:seek_point=1.4

  But this approach didn’t worked on my end, the -itsoffset offsets entire video output & seek_point wasn’t recognized by my avconv build.

  Then I tried offsetting each video individually.

  avconv -itsoffset 4 -i 1.webm -c copy tmp1.webm

  & simply overlaying

  avconv -i tmp1.webm -s 640x480 -vf "[in] scale=640/3:480, pad=3.01*iw:ih [video0]; movie=tmp2.webm, scale=640/3:480 [video1];[video0][video1] overlay=(640)/3:0 [VidO1]; movie=tmp3.webm, scale=640/3:480 [video2];[VidO1][video2] overlay=(640/3)*2:0 [out]" -b:v 768k Output.webm<

  The problem is all video start in split screen, from offset of first video as if individually offsetting didn’t worked.

• Video with background image

  23 novembre 2012, par Gabriele Murari

  since my video doesn't respect the safe area i thought to make it smaller and fill the background area (the resulting video must be 720x576 px) with a still image.

  So i've created a movie out of a still image (loop_video.mpg) and then i tried to mix it with my input video using it as a watermark. Doing so i lose the audio stream that comes from my input video.

  here my code :

  ffmpeg -i loop_video.mpg -vf \"movie=input.mpg, scale=648:519 [wm];[in][wm] overlay=36:28 [out]\" -b:v 4096k -bufsize 8192k -minrate 2048k -maxrate 8192k -y -t 10 out.mpg

  So i tried to mix the two and keeping just the audio stream of my input video, and then watermarking again, but i have a significant delay between video and audio stream. It seems that the watermark starts after 1 second :

  ffmpeg -i loop_video.mpg -i input.mpg -map 0:0 -map 1:1 -vf \"movie=input.mpg, scale=648:519 [wm];[in][wm] overlay=36:28 [out]\" -b:v 4096k -bufsize 8192k -minrate 2048k -maxrate 8192k -y -t 10 out.mpg

  Someone could help me ?

  Thanks so much