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• FFMpeg keep audio when adding date/time to video file

  19 juillet 2018, par user567424

  We have a video file we have recorded and have the ffmpeg script below which adds the date/time to it. However, the output file video loses the audio part. How do we get it to pull that over from the input video file as well, so the audio stays in place ?

  ffmpeg.exe -y -i "input.mp4" -ss 00:00:00 -t 00:02:17 -an -vcodec libx264 -profile:v baseline -level 13 -b:v 2000k -vf "drawtext=fontcolor=white:fontsize=16:fontfile="/Windows/Fonts/arial.ttf" :\text=12-07-2018— : box=1:boxcolor=black@0.3:x=(w-text_w-10):y=(h-text_h-5):timecode=’ 14:36:47~;00’:rate=30000/1001" output.mp4

• Streaming playlist with browser overlay [closed]

  28 juin 2024, par Tchoune

  Do you have any idea how I can stream a video playlist on twitch (with ffmpeg or another lib) and overlay a web page (with sub twitch alerts for example).

  


  I also need to be aware that my system needs to be multi-user. A user can stream on 1 to n different twitch channels. (multi instance).

  


  For my production, I plan to use linux server without GUI. I've been looking for a solution for 4 months, but I've run out of ideas.

  


  I've already tried xvfb to create a virtual desktop and display a chorimum browser, but it's not effective for production.
I've tried the whole pupeertee thing but it's not usable either.

  


  And my backend server is under nodejs with adonisjs.
I'm currently using ffmpeg to broadcast a video playlist with m3u8 :

  


  startStream(): number {
let parameters = [
  '-nostdin',
  '-re',
  '-f',
  'concat',
  '-safe',
  '0',
  '-vsync',
  'cfr',
  '-i',
  `concat:${app.publicPath(this.timelinePath)}`,
]

let filterComplex = ''

if (this.logo) {
  parameters.push('-i', app.publicPath(this.logo))
  filterComplex += '[1:v]scale=200:-1[logo];[0:v][logo]overlay=W-w-5:5[main];'
} else {
  filterComplex += '[0:v]'
}

if (this.overlay) {
  parameters.push('-i', app.publicPath(this.overlay))
  filterComplex += '[2:v]scale=-1:ih[overlay];[main][overlay]overlay=0:H-h[main];'
}

filterComplex += `[main]drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:textfile=${app.publicPath(this.guestFile)}:reload=1:x=(w-text_w)/2:y=h-text_h-10:fontsize=18:fontcolor=white[main]; [main]drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:text='%{localtime\\:%X}':x=10:y=h-text_h-10:fontsize=16:fontcolor=white`

parameters.push(
  '-filter_complex',
  filterComplex,
  '-copyts',
  '-pix_fmt',
  'yuv420p',
  '-s',
  '1920x1080',
  '-c:v',
  'libx264',
  '-profile:v',
  'high',
  '-preset',
  'veryfast',
  '-b:v',
  '6000k',
  '-maxrate',
  '7000k',
  '-minrate',
  '5000k',
  '-bufsize',
  '9000k',
  '-g',
  '120',
  '-r',
  '60',
  '-c:a',
  'aac',
  '-f',
  'flv',
  `${this.baseUrl}/${encryption.decrypt(this.streamKey)}`
)

this.instance = spawn('ffmpeg', parameters, {
  detached: true,
  stdio: ['ignore', 'pipe', 'pipe'],
})


  


  I've thought of using Webrtc, but it doesn't seem to meet my needs.

  


  I know that Gstreamer has wpeWebKit or wpesrc to do this, but there's no nodejs wrapper and above all it doesn't take playlist input (m3u8 or txt) into account...

  


  If anyone has any new ideas, I'd be very grateful.

  


• How to display live frame rate on top of video using ffmpeg ? [closed]

  2 juin 2021, par walking lime

  I want to display live frame rate over video using ffmpeg.I am using following command to get the frame number.Is it possible to get the frame rate as well ?.Thanks.

  


  ffmpeg -re -stream_loop -1 -i /dev/video0 -c:v libx264 -preset veryfast -tune zerolatency -profile:v baseline -pix_fmt yuv420p -bf 0 -x264-params keyint=30:scenecut=0 -vf "drawtext=fontfile=/usr/share/fonts/truetype/freefont/FreeMonoBold.ttf: text='%{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5"   -an -f mpegts udp://localhost:4000?pkt_size=1316