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• Extract audio from youtube in a client-side script

  5 mai 2018, par Kevin

  There are a lot of node libraries for turning a youtube video into an audio stream, but all of them rely on a C-library called ffmpeg.

  Ffmpeg has been ported to javascript as well, but it has a 30MB size, which seems rather cumbersome (ffmpeg does a lot more than just rip audio from youtube, it has many advanced audio filtering techniques that won’t be needed for this application).

  Lastly, I came across this link,https://hackernoon.com/how-to-build-an-audio-processor-in-your-browser-302cb7aa502a, which claims to be a client-side audio processor but really does all the stuff on the server-side, and then says that stuff can’t be done in the client because of CORS (not sure I understand this, can’t CORS be avoided with a simple flag in the request ?).

  Does anyone know of any way to stream audio within the client-side browser, specifically from youtube, in a manner that’s general and unopposed ?

• NGinx RTMP live stream text overlay and push to multiple

  26 avril 2020, par chrisale

  I have been banging my head against this wall for a long time. Hoping you all can get me over.

  



  I have a live stream coming from an IP Camera to my computer.

  



  Nginx publishes to YouTube and to an FFmpeg stream that takes a frame every minute to use for a static webcam image.

  



  Here is the code with the exec_push that I've tried to use with no success. The YouTube stream and frame capture work fine. I have FFmpeg installed with freetype. This is all on MacOS X 10.15.4 Catalina with home-brew FFmpeg —HEAD installed.

  



  Update : I should also say I have tried outputting the overlay using command line FFmpeg and it works great with this command :

  



  /usr/local/bin/ffmpeg -i rtmp://localhost:1935/live/68.1. -vf drawtext="fontfile=/System/Library/Fonts/Supplemental/Arial.ttf:text='Stack Overflow': fontcolor=white: fontsize=24: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=(h-text_h)/2" /Users/user/Desktop/test.mp4


  



  So it seems that the output portion is the part FFmpeg doesn't like in Nginx.conf

  



  My thought is I should be passing the overlayed FFmpeg stream to the "overlay" app and have the stream published to Youtube and the frame capture from there. (And also potentially recorded).

  



  Update : When I have tried point to a sh file to run the command rather than the direct FFmpeg exec_push I get :

  



  [alert] 56849#0: kevent() error on 15 filter:-1 flags:4002 (2: No such file or directory)


  



  Thanks so much !

  



  rtmp {
server {
       listen 1935;
       chunk_size 4096;

       application live {
                live on;
                record off;
                exec_push /usr/local/bin/ffmpeg -i rtmp://localhost:1935/live/68.1. -vf drawtext="fontfile=/System/Library/Fonts/Supplemental/Arial.ttf:textfile=/Users/Shared/overlayescaped.txt: reload=1: fontcolor=white: fontsize=20: box=1: boxcolor=black@1: boxborderw=75: x=70: y=925" -c:v libx264 -maxrate 6000k -bufsize 4000k -c:a aac -b:a 160k -ar 44100 -b:a 128k -f mp4 rtmp://localhost:1935/overlay/test;
                #push rtmp://localhost:1935/overlay;

                }

        application overlay {
                live on;
                record off;
                push rtmp://a.rtmp.youtube.com app=live2 playpath=yourstreamkey;
                exec_push /usr/local/bin/ffmpeg -i rtmp://localhost:1935/overlay/$name -vf fps=1/60 /Users/Shared/stream/netcam.jpg;
                }

        }

}


  


• How play YouTube and Facebook Video by using FFMpeg or FFPlay ?

  16 octobre 2018, par Keshvadi

  I want to do some measurement by streaming video from YouTube and Facebook. How can I use FFMpeg to stream video from these websites and record the playing log ?