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How use Opencv process signal input is Stream video on C#

asked 2013-02-27 19:43:02 -0500

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I have a project about image processing.I need to process signal is stream video from server.I use opencv-2.4.3 and C#.

Now,I want to ask OpenCV.Org.Is opencv-2.4.3 support input signal is stream video ( not from camera or webcam connect computer) Thanks!

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answered 2013-03-01 03:46:20 -0500

berak gravatar image

updated 2013-03-01 03:54:02 -0500

there is (limited) stream support in opencv via ffmpeg, if you got an mjpg url, you could try:

VideoCapture cap("http://ceac9.ua-camp-farms.arizona.edu/mjpg/video.mjpg");

unfortunately, that seems to work much nicer in linux, than on win

if it does not, you could still open a socket, and use imdecode() on the data you got. e.g, mjpeg is just single jpegs interleaved with multi-part form http headers.

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Thank for reply! When I builded Opencv with ffmpeg,I got stream video ex:VideoCapture cap("http://ceac9.ua-camp-farms.arizona.edu/mjpg/video.mjpg"); I use an app for Android to stream video is IP webcam.And I have link to stream is URL://IP:Port/videofeed but I don't get this stream video.Can you tell me edit ffmjpg to support it?

Diep gravatar imageDiep ( 2013-03-10 20:51:37 -0500 )edit

maybe it's lacking the information, that it's mjpeg type.

it's notffmpeg's fault, but opencv seems to need the literal string somewhere in the url, so try a trick:

just append a dummy param at the end uf the url like:

URL://IP:Port/videofeed?type=mjpg

helps most of the time!

berak gravatar imageberak ( 2013-03-11 04:26:11 -0500 )edit

I have just build Opencv-2.4.5 on Windows 7 but it doesn't support the stream from IP Webcam. Can you help me build full function of Opencv245?

Diep gravatar imageDiep ( 2013-04-11 23:22:03 -0500 )edit
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Asked: 2013-02-27 19:43:02 -0500

Seen: 2,977 times

Last updated: Apr 05 '13