Recherche avancée

Sur d’autres sites (7875)

• Softwares for adding real time text to a video [on hold]

  30 juillet 2013, par user763410

  I am trying to add real time text (like weather information, stock quotes) to a video and broadcast it. My videos are going to be 2 hours long. I have been searching for decent softwares which can do the work for me. FFmpeg can do overlays only if text to be added is available fully before running ffmpeg code, so its not real time. I have not been able to able to get gstreamer to work on my hardware.

  So, My question is :
  Please suggest some softwares which can add (text)data to a video in real time.
  Please don't post comparisons as that will trigger moderator's anger ! I don't want to start a flame war. Purpose of the question is to make a list. Btw, this should work from command line rather than a GUI.

  (Ps : If the question is closed because of being "not cnonstructive, please answer it on my google docs page here.
  http://goo.gl/14dR2H)

  Thanks very much in advance.

• How can I broadcast my webrtc (many to many) call using rtmp [closed]

  19 avril 2021, par Divyansh Agarwal

  I am building a application which helps us to broadcast many to many video call to youtube/twitch which uses RTMP to broadcast. So I need to convert my webrtc (many to many) call to RTMP.

  


  I have created a simple video conferencing app using webrtc in Node.js and now I want to convert all the streams in a particular room to RTMP stream and publish it to any platform supporting RTMP.

  


  Can I use ffmpeg for this purpose ? If yes then how could I do it ?

  


• FFMPEG rtmp stream slow and only works on chrome

  18 juin 2023, par DrMeepso

  I am trying to stream to twitch from a Node.js script for fun ! so far i have got it working but its slow and seemingly limited to 10-12 fps.

  


  Here is my code, i am trying to stream a Node-Canvas to twitch so i can do stuff without the overhead of OBS and in a console :

  


  import { createCanvas } from 'canvas';
import { spawn } from 'child_process'
import fs from 'fs';

const canvas = createCanvas(1920, 1080);
const ctx = canvas.getContext('2d');
// create a ffmpeg process that will stream the canvas to a rtmp server
const ffmpeg = spawn('ffmpeg', [
    '-re', // read input at native frame rate
    '-f', 'image2pipe', // tell ffmpeg to expect raw image stream
    '-vcodec', 'png', // tell ffmpeg to expect jpeg encoded images
    '-r', '10', // tell ffmpeg to expect 60 fps
    '-s', '1920x1080', // tell ffmpeg to expect size 1920x1080
    '-i', '-', // tell ffmpeg to expect input from stdin
    //'-c:v', 'h264_amf', // tell ffmpeg to encode in h264 codec AMD
    '-c:v', 'libx264', // tell ffmpeg to encode in h264 codec
    '-pix_fmt', 'yuv420p', // tell ffmpeg to encode in yuv420p format
    '-preset', 'ultrafast', // tell ffmpeg to use ultrafast encoding preset
    '-g', '20', // set the keyframe interval to 2 seconds so twitch will not reject the stream
    '-f', 'flv', // tell ffmpeg that we are going to stream flv video
    "rtmp://live.restream.io/live/"
]);

ffmpeg.on('close', (code, signal) => {
    console.log('FFmpeg child process closed, code ' + code + ', signal ' + signal);
})

ffmpeg.on('error', (err) => {
    console.log('FFmpeg child process error: ' + err.message);
})

ffmpeg.stderr.on('data', (data) => {
    //console.log('FFmpeg stderr: ' + data);
    //ParseFFPMPEGOutput(data.toString());
})

ffmpeg.stdout.on('data', (data) => {
    console.log('FFmpeg stdout: ' + data);
})

var DrawingCatagorys: string[] = []
fs.readFileSync('categories.txt').toString().split('\n').forEach(function (line) { DrawingCatagorys.push(line); })

function ParseFFPMPEGOutput(data: string) {

    if (data.includes('frame=')) {
        let frame = data.split('frame=')[1].split('fps')[0].trim();
        let fps = data.split('fps=')[1].split('q=')[0].trim();
        let size = data.split('size=')[1].split('time=')[0].trim();
        let time = data.split('time=')[1].split('bitrate=')[0].trim();
        let bitrate = data.split('bitrate=')[1].split('speed=')[0].trim();

        console.log(`Frame: ${frame} FPS: ${fps} Size: ${size} Time: ${time} Bitrate: ${bitrate}`);
    }

}

// create a png stream
setInterval(() => {
    // convert canvas to png
    const buffer = canvas.toBuffer('image/png');
    // write png stream to stdin of ffmpeg process
    ffmpeg.stdin.write(buffer);
}, 2);


  


  Im thinking it has to do with Node-Canvas just being slow but i have no idea, also even on my gaming rig it cant pull 1x speed while streaming always sitting around 0.95 - 0.98 and about 9.2 fps. also it only works on chrome and not firefox ? i have no idea why probably a codec thing