Open source portable/cross-platform video camera capture library [closed]

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I like to know if there's a open-source, cross-platform library for capturing web-cam data. Any other suggestions are welcome in case such solutions are not available. I am looking for something similar to portaudio if possible but this is not absolutely mandatory.

Also open-source & cross-platform projects falling into this category are a good starting point.

Thanks in advance,

Iulian

Libraries found:

portvideo. Does anyone have any experience with it?

reactivision. This one seems to be pretty cool and well supported.

libvidcap. Didn't manage to test it under Linux for the moment.

opencv and its highgui project

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Give a look at opencv and its highgui project.

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I heard OpenCV can do that. Never used it myself, so please take this suggestion with a grain of salt.

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I may be wrong but I think PortVideo is discontinued in favour of reactivision. Also here are a few others. I've never used either of them but plan on it soon. I also am looking for a good video capture API. These two also seem to offer processing and audio. I like PortAudio so much though that I'd like to stick with them for audio.

OpenML

FFmpeg