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• http-flv live broadcast with flv.js error

  29 mars 2019, par Forest Yang

  When I try nginx + nginx-http-flv-module + flv.js to play video from camera, error happened, but play with VLC works fine.

  log in nginx :

  flv live: app args MUST be specified, client: 192.168.89.1, server: myserver, request: "GET /live.html HTTP/1.1", host: "192.168.89.134:8080"

  Some key configurations,

  nginx.conf :

  http{
  
     ...
  
     server{
  
     ...
  
      location /live {
  
              flv_live on;
  
              chunked_transfer_encoding  on; #open 'Transfer-Encoding: chunked' response
  
              add_header 'Access-Control-Allow-Origin' '*'; #add additional HTTP header
  
              add_header 'Access-Control-Allow-Credentials' 'true'; #add additional HTTP header
  
          }
  
  
  
      }
  
  }
  
  
  
  rtmp {
  
      server {
  
          listen 1935;
  
          server_name 192.168.89.134;
  
  
  
          application myapp {
  
              live on;
  
              gop_cache on; 
  
            }
  
      }
  
  }

  ffmpeg command :

  ffmpeg -f avfoundation -s 1280x720 -r 30  -i 0 -f flv rtmp://192.168.89.134:1935/myapp/test

  VLC network url :

  http://192.168.89.134:8080/live?port=1935&app=myapp&stream=test

  HTML with flv.js :

  if (flvjs.isSupported()) {
  
              var videoElement = document.getElementById('videoElement');
  
              var flvPlayer = flvjs.createPlayer({
  
                  type: 'flv',
  
                  'isLive': true,
  
                  url: 'http://192.168.89.134:8080/live?port=1935&app=myapp&stream=test'
  
              });
  
              flvPlayer.attachMediaElement(videoElement);
  
              flvPlayer.load();
  
              flvPlayer.play();
  
          }

  Can anyone tell me why based your experience ? thank you.

• Stuck in deadend while compiling ffmpeg with nvidia CUDA support on Ubuntu 18.04 and GeForce GT 730

  24 février 2019, par Marko

  I want to compile ffmpeg with CUDA support, on Ubuntu 18.04, and my graphics card is GeForce GT 730 (so far I have not CUDA programming experience).
  Here nvidia claims that it has at least some transcoding support.

  I have cloned https://git.ffmpeg.org/ffmpeg.git and as I understand I also need to build and install nv-codec-headers.

  But there in the README, they say that minimum driver version for Linux is 418.30 or newer. So I went to nvidia site to download driver and after selecting my card I got this download link. So the driver version is high enough it seems. But when I try to install it I get message that this device will be ignored by that driver and that it is supported by legacy driver 390.xx (which is version I can install with apt).
  Is something wrong with nVidia, why are they offering me driver that is cannot be used for this device ?

  I’ve installed 390.xx driver using ubuntu-drivers autoinstall and built ffmpeg, but when I try to run it I get this error : Cannot load cuvidGetDecodeStatus [h264_cuvid @ 0x562a86dbc680] Failed loading nvcuvid.

  I suppose it is because of driver ?

  So, what can I do to unstuck myself ?

• How can I play an MPG file using Electron on windows without converting it ? [closed]

  1er novembre 2024, par Indy Singh

  I am trying to play MPG files in an Electron app on Windows. The files contain mpeg1 encoded video. I am using the video element. I can play MP4 files, but the MPG files do not play. One requirement is to be able to play the video from some arbitrary start time.

  


  Electron uses the Chrome engine to render output. Google Chrome app also cannot play MPG files.

  


  Electron uses ffmpeg.dll to play the video file. As far as I can tell ffmpeg.dll contains the mpeg1 decoder, but the video element does not appear to make use of it.

  


  I know I can convert the video before playing, however conversion takes several minutes and is not an ideal user experience. As a fallback I can convert small segments as needed, which still takes a bit of time, so it is not ideal.

  


  Streaming the video from a server process with on-the-fly conversion is possible, but I believe it may not work well with the need to seek. I could be wrong here.

  


  Any other suggestions would be welcome.

  


  EDIT 1 :
I am developing an Electron App using the programming languages TypeScript, JavaScript and HTML5 and the tools Nodejs and Electron. I did not post a code snippet as I am looking for an approach, not a fix for code. Not sure why this question got flagged as being 'not about programming'.

  


  A Google search does not show many options other than those mentioned below.

  


  EDIT 2 :
Thanks to the suggestion from VC.One I am looking at the JSMPEG library. It does look like it could possibly do the job but with 'numerous limitations'. It also say the other alternative called Broadway is 'huge, compiled with emscripten and quite complicated'

  


  EDIT 3 :
I am now looking hls.js, which I think will likely work for my needs. It integrates well with using the html5 video element. I can use it with on-demand decoding of the MPG MPEG1 video file in small segments.