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• avcodec : add avcodec_get_supported_config()

  3 avril 2024, par Niklas Haas

  avcodec : add avcodec_get_supported_config()
  This replaces the myriad of existing lists in AVCodec by a unified API
  
  call, allowing us to (ultimately) trim down the sizeof(AVCodec) quite
  
  substantially, while also making this more trivially extensible.
  In addition to the already covered lists, add two new entries for color
  
  space and color range, mirroring the newly added negotiable fields in
  
  libavfilter.
  Once the deprecation period passes for the existing public fields, the
  
  rough plan is to move the commonly used fields (such as
  
  pix_fmt/sample_fmt) into FFCodec, possibly as a union of audio and video
  
  configuration types, and then implement the rarely used fields with
  
  custom callbacks.
  

  • [DH] doc/APIchanges
  • [DH] libavcodec/avcodec.c
  • [DH] libavcodec/avcodec.h
  • [DH] libavcodec/codec.h
  • [DH] libavcodec/codec_internal.h
  • [DH] libavcodec/version.h

• MAINTAINERS : update myself for dvdvideo, rcwtdec, rcwtenc

  26 septembre 2024, par Marth64

  MAINTAINERS : update myself for dvdvideo, rcwtdec, rcwtenc
  I plan to look after and test them for the forseeable future.
  
  I am not a committer but do care for these muxers/demuxers.
  Signed-off-by : Marth64 <marth64@proxyid.net>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] MAINTAINERS

• 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.