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• 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.

  


• Update documentation for new compression presets

  10 novembre 2014, par Martijn van Beurden

  Update documentation for new compression presets
  Signed-off-by : Erik de Castro Lopo <erikd@mega-nerd.com>
  

  • [DH] doc/html/documentation_tools_flac.html
  • [DH] include/FLAC/stream_encoder.h
  • [DH] src/flac/main.c

• Error:No such property : targetPlatform for class : com.android.build.gradle.managed.NdkConfig

  30 juillet 2016, par Alder

  I am trying to build FFMPEG into my JNI code with gradle in Android Studio. I have build FFMPEG as a .so file, in order to adapt different platform, I build it for different ABI(arm64-v8a, armeabi-v7a, mip, etc).Then I need to determine the ABI of the current build in the build.gradle file.

  Refer Experimental Plugin User Guide, my build.gradle look like this :

  apply plugin: 'com.android.model.native'    
  
  model{
  
      repositories {
  
          prebuilt(PrebuiltLibraries){
  
              ffmpeg{
  
                  headers.srcDir "src/main/jni/build/${targetPlatform.getName()}/include"
  
                  binaries.withType(SharedLibraryBinary) {
  
                      sharedLibraryFile = file("src/main/jni/build/${targetPlatform.getName()}/libvflibrary.so")
  
                  }
  
              }
  
          }
  
      }
  
      android {
  
          compileSdkVersion = 24
  
          buildToolsVersion = "23.0.3"
  
  
  
          defaultConfig {
  
              minSdkVersion.apiLevel = 15
  
              targetSdkVersion.apiLevel = 24
  
              versionCode = 1
  
              versionName = "1.0"
  
          }
  
  
  
          ndk{
  
              //platformVersion = 21
  
              moduleName = "library-jni"
  
              stl = 'gnustl_static'
  
              toolchain = "clang"
  
              abiFilters.addAll(['armeabi', 'armeabi-v7a', 'arm64-v8a', 'mips'])
  
              cppFlags.addAll(['-std=c++11', '-D__STDC_CONSTANT_MACROS'])
  
              ldLibs.addAll(['log', 'android', 'z', 'EGL', 'GLESv2'])
  
          }
  
  
  
          sources {
  
              main {
  
                  jni {
  
                      source{
  
                          srcDirs 'src/main/jni'
  
                      }
  
                      dependencies {
  
                          library 'ffmpeg' linkage 'shared'
  
                      }
  
                  }
  
              }
  
          }
  
      }
  
  }

  I am getting an error :

  Error:No such property : targetPlatform for class :
  com.android.build.gradle.managed.NdkConfig.

  Does anyone have an idea on how I can solve this, please ?