c++ - OpenCV capturing desktop screen live -

c++ - OpenCV capturing desktop screen live -

i'm using opencv c++ coding project. i'm having difficulty of limitations in opencv, want analyse video file , observe objects. works perfectly, want analyse section of desktop screen. (live)

does have clue how accomplish this? thought of making webcam simulator captures desktop screen think thats way complicated , should much more easy.

if you're targeting windows os, alternative recommended engine seems ideal.

for linux ended using rtsp server(ffserver) videocapture input, screencasting using ffmpeg "x11grab".

ffmpeg windows take "screen-capture-recorder" application input, don't have experience setting rtsp server on windows.

for setup translated code looked this:

cv::videocapture cap; cap.open("http://localhost:8090/live.flv"); // open default photographic camera cap.set(cv_cap_prop_fourcc, cv_fourcc('f', 'l', 'v', '1'));

and

cv::resize(frame, frame, cv::size(200, 200)); cv::videowriter outstream("http://localhost:8090/feed2.ffm", cv_fourcc('f', 'l', 'v', '1'), 10, cv::size(200, 200), true);

the 200x200 resolution necessary minimize latency if can grab screen buffer straight avoid unnecessary screencasting/encoding sounds improve performance standpoint...

c++ opencv webcam