Recherche avancée

Sur d’autres sites (13369)

• ffmpeg save mp3 file from available wss stream

  11 juillet 2021, par phoenixAZ

  In a hello world node.js app I am succeeding in getting a feed from twilio conference and sending to the google speech to text. Concurrently I want to control recording to mp3 of the available audio stream (programmatically call start and stop). The was is subscribed to audio stream but I don't know how to attach ffmpeg to the local stream. I have tried :

  


              // ffmpeg('rtsp://host:port/path/to/stream')
            //experimenting telling it to use the local stream
            //
            //ffmpeg(wss.addListener)  //invlaid input error
            //ffmpeg(wss.stream) //thsi hits the console error below
            ffmpeg(wss.stream)
            .noVideo()
            .audioChannels(1)
            .audioBitrate(128)
            .duration('1:00')
            .on('end', function () { console.log('saved mp3'); })
            .on('error', function (err) { console.log('error mp3'); })
            .save('/path/to/output.mp3');


  


  Any suggestions are welcomed. I am in a node.js project

  


• Regarding converting Webm to Mp4 using ffmpeg and getting problem with not receiving audio from the converted video file

  14 septembre 2022, par MikeEl

  I'm using react-ffmpeg npm package for converting the webm video format to mp4 format. Like here, this is the function which is used to convert the format.

  


  const convertFunc = async(fileurl) => {
console.log("run");
const file = fileurl
console.log("before", file);
await FFMPEG.process(
  file,
  "-f mp4 -c:v libx264 -an -profile:v baseline -level 3.0 -movflags +faststart -hide_banner",
  function (e) {
    console.log(e);
    
    const video = e.result;
    const reader = new FileReader();
      reader.readAsDataURL(video);
      reader.onload = function (e) {

        
        console.log("Process time: ",reader.result);
      };
    console.log(video);
  }
);


  


  }

  


  


  -f mp4 -c:v libx264 -an -profile:v baseline -level 3.0 -movflags +faststart -hide_banner

  


  


  this line is used for convert the format. But when I received the converted file. It is muted or there is no audio in it.
In the ffmpeg command "-an" is used to remove audio from output converted video. But when I remove it from the above command then also audio is not there.

  


  any solution ?
Thanks for you answers in advance.

  


• The ffmpeg output binary stream front-end uses WebSocket to accept and cannot be played [closed]

  17 novembre 2024, par KIMEOOK

  Server push nodejs

  


  Use ws service to pass to the front end

  


        ffmpegs = spawn('ffmpeg', [
        '-f', 'gdigrab',  // 这是 Windows 下用于捕获屏幕的输入格式
        '-framerate', '60',  // 捕获帧率
        '-i', 'desktop',  // 捕获桌面（即屏幕）
        '-c:v', 'vp8',  // 视频编码格式
        '-f', 'webm',  // 设置输出为 mpegts 流
        '-pix_fmt', 'yuv420p',
        'pipe:1',  // 输出到管道
      ]);


  


  


  


  Front-end rendering

  


  
      let videoElement = document.getElementById('screenVideo');

      let mediaSource = new MediaSource();
      videoElement.src = URL.createObjectURL(mediaSource);

      mediaSource.addEventListener('sourceopen', () => {

        let sourceBuffer = mediaSource.addSourceBuffer('video/webm; codecs="vp8"'); 

        let ws = new WebSocket(`ws://${ip}:3000/?device=${encodeURIComponent(selectedDevice)}`);

        ws.onmessage = (event) => {
          const data = new Uint8Array(event.data);
          if (!sourceBuffer.updating) {
            try {
              sourceBuffer.appendBuffer(data);
              console.log('ok')
            } catch (error) {
              console.error('Error appending buffer:', error);
            }
          } else {
            console.log('SourceBuffer is busy');
          }
        };

        ws.onerror = (error) => {
          console.error('WebSocket error:', error);
        };

        ws.onclose = () => {
          console.log('WebSocket connection closed');
        };

        if (mediaSource.readyState === 'open') {
          videoElement.play().catch(err => {
            console.error('Error attempting to play the video:', err);
          });
        }
}


  


  The video keeps spinning in circles and cannot be played normally.

  


  

  


  Unable to play normally. What's the problem ?