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• Building A livestreaming server like youtube from scratch

  9 décembre 2022, par Dipo Ahmed

  I am trying to build a live streaming server like youtube where I can watch the video live or if I want to I can play the video from any duration I want.

  


  What I have tried so far.
I have built a node js WebSocket server where I push the video blob that I receive from the browser via MediaRecorder API every 2 seconds. This blob is then getting converted to hls by a ffmpeg process which generates 2 seconds *.ts files and a .m3u8 file which I am playing with video.js in browser.

  


  This is my ffmpeg command

  


   spawn('ffmpeg', [
        '-i', '-',
        // '-re',
        '-fflags', '+igndts',

        '-vcodec', 'h264',
        '-acodec', 'aac',

        '-preset', 'slow',
        '-crf', '22',
        // You can also use QP value to adjust output stream quality, e.g.: 
        // '-qp', '0',
        // You can also specify output target bitrate directly, e.g.:
        '-b:v', '1500K',
        '-b:a', '128K', // Audio bitrate

        '-f', 'hls',
        '-hls_time', '1',
        // '-hls_playlist_type', 'vod',
        '-hls_list_size', '2',
        '-hls_flags', 'independent_segments',
        '-hls_segment_type', 'mpegts',
        '-hls_segment_filename', `${path}/stream%02d.ts`, `${path}/stream.m3u8`,
    ]);


  


  The problem is that the video js player duration is not updating like in youtube where the video duration increases every second.

  


  Any direction will be appreciated. Please tell me if my approach is wrong and what needs to be learned for me to build this system.

  


• Stream PNG file to youtube with ffmpeg

  3 avril 2022, par codingmaster398

  What I'm trying to do :
I have a PNG file that is constantly getting written to. I want to pipe it (while it changes) to YouTube's RTMP server.

  


  What I've attempted :

  


  runCommand(
      'ffmpeg',
      `-threads:v 2 -threads:a 8 -filter_threads 2 -thread_queue_size 512 \
-loop 1 -re -i place.png \
-stream_loop -1 \
-filter:v "crop=in_w/2:in_h/2:1920:1280" \
-pix_fmt yuv420p -c:v libx264 -qp:v 19 -profile:v high -rc:v cbr_ld_hq -level:v 4.2 -r:v 60 -g:v 120 -bf:v 3 -refs:v 16 -preset fast -f flv rtmp://a.rtmp.youtube.com/live2/${steamKey}`,
    () => {},
    () => console.log('finished')
)

setInterval(()=>{
  image.write('./place.png') // Jimp },5000)


  


  What happens :

  


  ffmpeg version 4.4.1 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.3.0 (GCC)
  configuration: --disable-static --prefix=/nix/store/7x62j0rls5dpriig91qrk0qh7hvvqd7k-ffmpeg-4.4.1 --arch=x86_64 --target_os=linux --enable-gpl --enable-version3 --enable-shared --enable-pic --enable-libsrt --enable-runtime-cpudetect --enable-hardcoded-tables --enable-pthreads --disable-w32threads --disable-os2threads --enable-network --enable-pixelutils --enable-ffmpeg --disable-ffplay --enable-ffprobe --enable-avcodec --enable-avdevice --enable-avfilter --enable-avformat --enable-avresample --enable-avutil --enable-postproc --enable-swresample --enable-swscale --disable-doc --enable-libass --enable-bzlib --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libmp3lame --enable-iconv --enable-libtheora --enable-libssh --enable-vaapi --enable-libdrm --enable-vdpau --enable-libvorbis --enable-libvpx --enable-lzma --disable-opengl --disable-libmfx --disable-libaom --enable-libpulse --enable-sdl2 --enable-libsoxr --enable-libx264 --enable-libxvid --enable-zlib --enable-libopus --enable-libspeex --enable-libx265 --enable-libdav1d --disable-debug --enable-optimizations --disable-extra-warnings --disable-stripping
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100

Input #0, png_pipe, from 'place.png':
  Duration: N/A, bitrate: N/A
  Stream #0:0: Video: png, rgba(pc), 2000x1000, 25 fps, 25 tbr, 25 tbn, 25 tbc
Option stream_loop (set number of times input stream shall be looped) cannot be applied to output url rtmp://a.rtmp.youtube.com/live2/[key here lol] -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to.
Error parsing options for output file rtmp://a.rtmp.youtube.com/live2/[key here lol].
Error opening output files: Invalid argument

finished


  


  References :

  


  Send live stream packets to youtube with nodejs ?

  


  streaming to youtube with ffmpeg

  


• how to stream a website to youtube using ffmpeg with python [closed]

  22 avril 2023, par Eyal B

  I want to stream a website (more specifically an element) to YT using ffmpeg with python. i already found a way to stream an mp4, but now i want to stream a website. i thought of using a headless browser like puppeteer and selenium, but couldnt quite get it right.
the ffmpeg command that worked was : ffmpeg -re -i cat.mp4 -pix_fmt yuvj420p  -x264-params keyint=48:min-keyint=48:scenecut=-1  -b:v 4500k -b:a 128k -ar 44100 -acodec aac -vcodec libx264 -preset medium -crf 28 -threads 4 -f flv rtmp://x.rtmp.youtube.com/live2/waas-xbqw-d671-4a75-2qq2 thanks in advance !