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• ffmpeg:Unable to broadcast to live stream from webcam

  13 mai 2020, par gbenga ogunbule

  I have this code that I believe should be able to grab from webcam and broadcast a live stream i.e. Users will be able to watch or stream live what there admin is doing at that moment in time.

  



  I have this code for it

  



  C:\Apache24\htdocs\v­ideo\assets\ffmpeg\b­in>ffmpeg -f dshow -i video="HP Webcam" -c:v libx264 -preset ultrafast -tune zerolatency -r 10 -async 1 -c:a libmp3lame -b:a 24k -ar 22050 -bsf:v h264_mp4toannexb -maxrate 750k -bufsize 3000k -f mpegt s C:\Apache24\htdocs\v­ideo\assets\uploads\­videos\en.mp4


  



  Also notice I use the absolute path mpegt s C:\Apache24\htdocs\v­ideo\assets\uploads\­videos\en.mp4 instead localhost/video/assets/uploads/videos/en.mp4 and the reason is because, when I use the latter, it is recording the video into the folder where I run the command.

  



  And this is the HTML code I wrote for it.

  



  <video width="320" height="240" controls="controls">&#xA;  <source src="assets/uploads/videos/en.mp4" type="video/mp4">&#xA;Your browser does not support the video tag.&#xA;</source></video>&#xA;

  



  How do I online streaming using ffmpeg

  


• What is the recommended settings for video editing using ffmpeg ?

  19 août 2020, par Moustafa Mahmoud

  I am quite new for using FFmpeg, and I am using FFmpeg in screen recording. I checked the online documentation in this link ffmpeg documentation "Capturing your Desktop / Screen Recording", but I didn't find sufficient information.

  


  I have a 4k laptop with invidia GPU, and I am using the below command to screencast the video (4k, 60 f/s), and audio from my laptop.

  


  ffmpeg -video_size 3840x2160 \
 -framerate 60 \
 -f x11grab -i :1 -f pulse -ac 2 -i default \
 -c:v libx264 \
 -crf 0 \
 -qp 0 \
 -preset ultrafast videoname.mp4


  


  I have some problems in these settings as following :

  


  

  1. The output video is too large, and I need to reduce the size without touch the quality at all.

  


  2. The output video seems to be not a row video, and it takes too much time in video editing decoding and encoding. I am not sure if there is a recommended setting for video editing. As I did some search and found the above is advised, but in practice perspective, it is not efficient.

  


  


  Below is my Linux distro information :

  


  Distributor ID: Ubuntu
Description   : Ubuntu 20.04.1 LTS
Release       : 20.04
Codename      : focal


  


• Nodejs - Using ffmpeg with video thumbnails

  8 mars 2016, par RunningFromShia

  I am pretty much lost within the concept of ffmpeg and nodejs. ffmpeg is supposed to do important conversion work, that I get, but every time I try to implement a nodejs package with ffmpeg it just fails. I will give an example :

  using this for example in my app :
  https://www.npmjs.com/package/video-thumb

  my app.js :

  var express = require('express');
  
  var app = express();    
  
  
  
  var thumbler = require('video-thumb');
  
  
  
  thumbler.extract('http://www.w3schools.com/html/mov_bbb.mp4', 'snapshot.png', '00:00:1', '200x125', function(){
  
  
  
      console.log('snapshot saved to snapshot.png (200x125) with a frame at 00:00:1');
  
  
  
  });
  
  
  
  var port = process.env.PORT || 1337;
  
  
  
  app.listen(port);  

  Basically, I’ve tried a couple of nodejs packages that turn a snapshot out of a given video, and then save it to my server. each attempt failed. they all use ffmpeg. the above is just one of them.

  Now, I put a ffmpeg.exe in my root folder, I am just not sure where it’s supposed to be or how to use it with node. Needless to say, the above example doesn’t do anything. Tutorials online only show how to convert a certain video to a certain format in windows using ffmpeg, there is nothing about nodejs.
  I’d like some guidance here, thank you for your time.