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• iPAD Streaming video to a ffmpeg server. front facing camera

  6 décembre 2011, par IrishGringo

  This is a video chat type program.
  My project is to write a native ObjC app that will stream video from the front facing camera to a server. This server will format and relay to be sent to another location.
  In a related question, I want to display video streaming from the server. The video server will probably be running ffmpeg for formating.
  But this question is just asking advice for the iPAD project. I wanted to get comments about issues I need to be thinking about.

  This is my strategy :
  I was thinking of using AVFoundation framework to stream from the cam to a URL server. I don't know if I will be formatting on the client or no, so some comment there would be interesting. http://developer.apple.com/library/mac/#documentation/AVFoundation/Reference/AVFoundationFramework/_index.html

  For streaming the video, I was going to be using :
  http://developer.apple.com/library/IOs/#documentation/AVFoundation/Reference/AVCaptureSession_Class/Reference/Reference.html#//apple_ref/occ/cl/AVCaptureSession

  so if someone has some ideas/suggestions... extra code I can look at. I would appreciate it.

• How to restrict ffmpeg to use only 50% of my CPU ?

  21 septembre 2016, par zukes

  i m using ffmpeg for streaming my desktop over UDP but my problem is ffmpeg’s process always takes 100% cpu for the entire time it is running leaving no room other application , my question is how can i restrict ffmpeg’s process to take up only 50-60% of cpu ?

  My cpu has single core
  2 gb ram

• ffmpeg : process each image frame after capturing with x11grab

  21 juin 2012, par cache

  Programmatic way to process each image frame right after capturing using x11grab in ffmpeg

  For example, I have a program that captures screenshots from x display using command :

  ffmpeg -f x11grab -s cif -r 25 -i :0.0 /tmp/out.mpg

  '-r 25' means there are 25 frames being captured in a second. And my question is how to process each frame(image) and decide whether I want to keep this frame or drop it right after each image is captured. I guess this should be done in C by adding some code in x11grab.c.