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• How do I play an audio clip from a https URL in Qt6 on Windows ?

  20 mai 2023, par wiktort1

  I keep getting the following error :

  


  https protocol not found, recompile FFmpeg with openssl, gnutls or securetransport enabled


  


  I link OpenSSL in my project, I also have OpenSSL Toolkit installed through the Qt Maintenance Tool, however that doesn't seem to fix it.

  


  I have also found an answer online, that said that I need to copy the OpenSSL DLLs to my build folder, but that didn't work either.

  


  I use Qt 6.5.0.

  


  Do I have to compile Qt on my own ? or is there a different approach ?

  


• Stripping a video with start point and end point defined using TimeCodes

  12 juin 2014, par Tarun

  Is anyone aware about how to strip a segment out of a video , a segment whose start point and end points are defined by TimeCode not TimeStamp.

  I tried ffmpeg and ffmbc but I dont think they support cutting video based on timeCode.

  I have also considered approach where I can attemp to convert a timecode into timestamp

  Would anyone please advise ?

• How to extract frames in real time from the MediaStream object returned from the frontend in backend

  23 mai 2023, par Darwin Swartz

  is it possible to extract frames in real-time on the backend from a MediaStream object returned from the frontend ? something like :- instead of extracting frames from a canvas element in frontend and sending those frames to the backend in real time, can we send just the stream instance to the backend and extract frames there in real time until the user stops the recording ?

  


  chrome.tabCapture.capture({ audio: false, video: true }, function(stream) {
  // Use the media stream object here
});


  


  I am using tabCapture api which returns a stream, now I want to send this MediaStream instance in real time to the backend and extract frames there and edit something on them in real-time using OpenCV or FFmpeg. is this something technically possible ?

  


  One approach I have seen is

  


  chrome.tabCapture.capture({ audio: false, video: true }, function(stream) {
  video.srcObject = stream
  const canvas = document.createElement('canvas');
  const ctx = canvas.getContext('2d');
   ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
  const imageData = canvas.toDataURL('image/jpeg');
});


  


  drawing each frame on top of a canvas and capturing those frames from it (in the frontend itself)and sending those frames in real-time to the backend using web sockets. I am not sure about this approach as this might be bad for frontend memory wise,

  


  What could be a more efficient way of implementing real-time frame editing with frame manipulation libraries like OpenCV and FFmpeg