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• Anomalie #4075 : Mail du privé envoyés aux auteurs des messages proposés dans le public si article...

  15 janvier 2018

  C’était bien le plugin !
  Corrigé : https://zone.spip.org/trac/spip-zone/changeset/108516

• Streaming opencv to youtube with ffmpeg

  29 juin 2020, par Tim Treurniet

  I am trying to live stream to youtube from a c++ opencv project. Currently, my program outputs a RTMP stream which nginx should push to youtube. A problem I'm having is youtube's requirement for an audio stream.

  


  I'm trying a workaround by restreaming using ffmpeg. It adds an empty audio stream (not efficient). Another issue is the output speed of my program which is around 10 fps. When playing in vlc or youtube, the stream buffers for a while and plays a few seconds of smooth video. How should I set this up in c++ to play a constant stream with lower fps, including an empty audio stream ?
Example I used : https://github.com/andreanobile/opencv_ffmpeg_streaming

  


  FFMPEG for adding audio :
ffmpeg -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=44100 -hwaccel cuvid -i rtmp ://localhost/live -vf scale=3840:2160 -c:v h264_nvenc -preset fast -maxrate 6000k -pix_fmt yuv420p -g 50 -b:a 160k -ac 2 -c:a aac -f flv rtmp ://a.rtmp.youtube.com/live2/

  


• Youtube-dl cannot read various set on batch script

  18 novembre 2019, par Al UrbaseR Blongtous

  I created an batch-script that positioned with youtube-dl and ffmpeg. I set several set to put URL and Video/Audio ID. Here my script that I simplified

  @echo off
  
  cd /d %root%\YT
  
  color 0a
  
  title Youtube Downloader
  
  setlocal enableDelayedExpansion
  
  set q=^"
  
  color 0a
  
  
  
  :submenu
  
  echo Please enter URL.
  
  set /p f1="URL: " 
  
  echo Checking ID...
  
  youtube-dl -F %f1%
  
  ping localhost -n 2 >nul
  
  goto menu
  
  
  
  :menu
  
  echo.
  
  echo Script created by UrbaseR
  
  echo ___________________________________________________________
  
  echo.
  
  echo                          MENU
  
  echo ___________________________________________________________
  
  echo OS Windows - %ComputerName%
  
  echo.
  
  echo M E N U
  
  echo Press 1 to Download Best version 
  
  echo Press 2 to Download Custom version + convert
  
  echo Press 3 to Exit
  
  
  
  set /p you=">"
  
  if %you%==1 goto 1
  
  if %you%==2 goto 2
  
  if %you%==3 goto 3
  
  
  
  cls
  
  echo *********************************
  
  echo Sorry invalid number!
  
  echo *********************************
  
  ping localhost -n 2 >nul
  
  goto menu
  
  
  
  :1
  
  echo Downloading...
  
  youtube-dl -f best %f1%
  
  echo.
  
  echo Done
  
  ping localhost -n 2 >nul
  
  cls
  
  goto submenu
  
  
  
  :2
  
  set /p id1="Insert Video ID: "
  
  set /p id2="Insert Audio ID: "
  
  echo Downloading Video..
  
  youtube-dl -f %id1% -ciw -o "vid.%(ext)s" -v --write-sub %f1%
  
  echo.
  
  echo Video Done
  
  ping localhost -n 2 >nul
  
  echo Downloading Audio..
  
  youtube-dl -f %id2% -ciw -o "aud.%(ext)s" -v %f1%
  
  echo.
  
  echo Audio Done
  
  ping localhost -n 2 >nul
  
  echo Converting Video
  
  ffmpeg -i "vid.%(ext)s" -i "aud.%(ext)s" -c:v copy -c:a aac -strict experimental "input.mkv"
  
  echo Converting Done
  
  ping localhost -n 4 >nul
  
  cls
  
  goto submenu
  
  
  
  :3
  
  exit

  First and third option execute successfully. Second option will appear the message like this :

  Usage : youtube-dl [OPTIONS] URL [URL...]
  youtube-dl : error : You must provide at least one URL.

  Type youtube-dl —help to see a list of all options.

  Note : Since I stuck on first and second stage of youtube-dl, ffmpeg may not work (I have not tested it yet).

  Can you help me ?