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• Get image from webcam, convert that image into something else, and returning it back to the client

  29 janvier 2023, par immigration9

  I have some questions on choosing the right architectural decision to solve my problem.

  


  I am planning to create an app, which takes the

  


  


  1. input from a client's (a browser) webcam,

     


  


  2. sending the input to the server (whether frame by frame, or just live stream video)

     


  


  3. getting each frame from the server (into a image)

     


  


  4. convert the image using some technology (let's say like a tiktok filter)

     


  


  5. returning the image back to the client in real time.

     


  


  


  Except for the phase 4 which the technology can only be applied on an image,
Everything else can be changed.

  


  I'm targeting 30fps (or at least 20) with 1080p quality.

  


  The language or framework is completely agnostic as I do not have any preference. Right now, I am thinking of using React with Node, but I'm opened to other options as well. (eg. Python maybe. Language doesn't matter)

  


  If anyone have some prior experiences, can you teach me the best way ?

  


  I've tried to create the image blob from client and send it to the server using socket.io but it seemed too slow to use when targeted at 30fps on 1080p image.

  


  I'm currently looking at WebRTC with fluent-ffmpeg, but not sure if it's the right way.

  


  Any kind of help will be appreciated.

  


• node js ffmpeg complexfilter overlay another video

  13 octobre 2016, par Handsum

  I have this code planning to output a video containing vid1 and vid2 side by side. So I add a padding to the right of vid1 and tried to use overlay to put vid2 on that space but instead the output video shows a duplicate of vid1 to the right. Can someone please tell me what is wrong with my code and how to fix it ? Thanks

  ffmpeg("vid1.mp4")
  
  .input("vid2.mp4")
  
  .complexFilter([
  
      "scale=300:300[rescaled]",
  
      {
  
          filter:"pad",options:{w:"600",h:"300"},
  
          inputs:"rescaled",outputs:"padded"
  
      },
  
      {
  
          filter:"overlay", options:{x:"300",y:"0"},
  
          inputs:["padded","vid2.mp4"],outputs:"output"
  
      }
  
  ], 'output')
  
  .output("output.mp4")
  
  .on("error",function(er){
  
      console.log("error occured: "+er.message);
  
  })
  
  .on("end",function(){
  
      console.log("success");
  
  })
  
  .run();

• Monitoring ffmpeg two-passes encoding

  31 décembre 2024, par Hodol

  I'm new in FFMPEG.

  


  According to the official guide, https://trac.ffmpeg.org/wiki/Encode/VP9 I use the following command to convert a large h.264 file :

  


  ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 0 -crf 30 -pass 1 -an -f null /dev/null
ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 0 -crf 30 -pass 2 -c:a libopus output.webm


  


  However, the pass-1 takes too long time and it does not log progress. With -report option I can see something is in progress but I don't know how long I should wait.

  


  Here's questions :

  


  

  1. Is there any way to see the progress of 1-pass ?

  


  2. Is there any way to speed up the process ?

  


  


  Thank you,