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• Stream to youtube from xvfb using ffmpeg and x11grab

  13 December 2017, by Ivan Sergeev

  I want to make stream from virtual display to youtube via ffmpeg.
  I’m using this code:

  #! /bin/bash
  
  
  
  BITRATE="2500k"                                    
  
  FPS="30"                                       
  
  
  
  YOUTUBE_URL="rtmp://a.rtmp.youtube.com/live2"  
  
  YOUTUBE_KEY="..."                                     
  
  
  
  SOURCE="./test.mp4"
  
  
  
  export DISPLAY=44
  
  sudo xvfb-run -a -n 44 -l -s "-screen 0, 1280x720x24" google-chrome -start-maximized https://upload.wikimedia.org/wikipedia/commons/2/2c/Rotating_earth_%28large%29.gif --no-sandbox >/dev/null &
  
  
  
  ffmpeg -threads 0 -y -v verbose -re \
  
   -f x11grab -video_size 1280x720 -i :44 \
  
   -vcodec libx264 -pix_fmt yuv420p -preset ultrafast -r $FPS -g $(($FPS * 2)) -b:v $BITRATE -bufsize 512k \
  
   -acodec libmp3lame -ar 44100 -threads 0 -crf 25 -b:a 712000 -bufsize 512k \
  
   -f flv "$YOUTUBE_URL/$YOUTUBE_KEY"

  And I don’t receive any errors, but youtube cannot start stream(

  In my log:

  Stream mapping:
  
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=    4 fps=0.0 q=17.0 size=      72kB time=00:00:00.50 bitrate=1186.9kbits/s
  
  frame=    6 fps=5.9 q=17.0 size=     106kB time=00:00:00.93 bitrate= 931.2kbits
  
  frame=    8 fps=5.3 q=17.0 size=     141kB time=00:00:01.36 bitrate= 846.4kbits/s
  
  frame=   11 fps=5.4 q=16.0 size=     188kB time=00:00:02.00 bitrate= 771.9kbits/s
  
  frame=   13 fps=5.2 q=15.0 size=     217kB time=00:00:02.43 bitrate= 730.5kbits/s
  
  frame=   15 fps=5.0 q=14.0 size=     241kB time=00:00:02.86 bitrate= 687.2kbits/s
  
  frame=   18 fps=5.1 q=14.0 size=     270kB time=00:00:03.53 bitrate= 625.2kbits/s
  
  frame=   20 fps=4.9 q=15.0 size=     294kB time=00:00:03.96 bitrate= 608.3kbits/s

  etc.

  However, if I do stream from file, but not x11grab stream is starting normal.

  What I’m doing wrong?
  Any ideas, guys, please)

• ffmpeg and Youtube upload - can't merge existing audio track with external one

  9 April 2012, by Aleksy Goroszko

  I am realizing campaign, where idea is that users are creating TV ad. The process looks as following:

  • User watches ad (youtube video)
  • User selects video (mp4 file played in Flash Player)
  • User records his own voice using webcam/mic for the selected video
  • User's voice is uploaded to server
  • User's voice is merged with selected video (video+music) and saved as mp4 file
  • User's video is uploaded to youtube

  When realizing audio-video merging I found some suprises:

  When I was using command

  ffmpeg -i sourceVideoFile.mp4 -i sourceAudioFile.mp3 -acodec copy -vcodec copy outputFile.mp4 - video's music was replaced by user's voice.

  So I used option -newaudio:

  ffmpeg -i sourceVideoFile.mp4 -i sourceAudioFile.mp3 -acodec copy -vcodec copy outputFile.mp4 -newaudio - I can hear that output video has both music and user's voice. So - that's what I wanted to reach. But...

  The surprize is that if I upload this video to Youtube, after it's processing I can watch it and hear only music. User's voice disappears!

  So, how to keep both voice and music?

  Any idea, gurus? :)

• How to stream 24/7 on youtube (audio + video) with FFMPEG

  29 September 2023, by Carter510

  I plan to create a 24/7 stream with a video and a musical background which is located in a /Playlist folder.
I would like the music playlist to be played randomly and if a piece of music is corrupted or cannot be played, the program moves on to the next one.

  


  The problem is that with my command every time the music changes the stream stops.
Any suggestions ?

  


  #!/bin/bash

VBR="4500k"
FPS="30"
QUAL="superfast"

YOUTUBE_URL="rtmp://a.rtmp.youtube.com/live2"
KEY="XXXX-XXXX-XXXX-XXXX"

VIDEO_SOURCE="fireplace.mkv"
AUDIO_FOLDER="/home/administrateur/Documents/Youtube/Playlist"

while true; do
    # Joue la vidéo en boucle
    ffmpeg -re -stream_loop -1 -i "$VIDEO_SOURCE" \
    -thread_queue_size 512 -i "$(find "$AUDIO_FOLDER" -type f -name "*.mp3" | shuf -n 1)" \
    -map 0:v:0 -map 1:a:0 \
    -map_metadata:g 1:g \
    -vcodec libx264 -pix_fmt yuv420p -preset $QUAL -r $FPS -g $(($FPS * 2)) -b:v $VBR \
    -acodec libmp3lame -ar 44100 -threads 6 -qscale:v 3 -b:a 320000 -bufsize 512k \
    -f flv "$YOUTUBE_URL/$KEY"
done


  


  I would like the fireplace.mkv video to play without interruption, for the music to be chosen randomly without ever stopping. And if one of the songs cannot be played, it is skipped.