pfeatherstone

What would be really cool, is if you could specify where to look for ffmpeg. If using pkg-config under the hood, i imagine using ```PKG_CONFIG_PATH``` will suffice.

Wow, a PR within a PR

I merged. I'm not an authority on cmake I'm afraid. But I do think the API can be improved a lot. I worked for a while on a different version...

It might be easier to merge what we have now and do bite-size increments. But we might need to add something that says : "This is an unstable API. If...

Or we namespace the incremental versions. This could be in namespace ```dlib::video_io::v1```, and later versions which introduce breaking API changes could be in namespace ```dlib::video_io::v2``` etc... I don't like this...

It's been a while since i've used this particular object, but i thought it was something like: ``` dlib::video_capture cap; cap.open("/dev/video0"); ... ```

I'll have a look at some point. Can't guarantee when though. It's possible this object is out of date. I haven't added nearly enough runtime checks with useful print statements....

With regards to your error, i think that's an FFmpeg thing. Can you build ffmpeg from source using version v4.3.2 and try again? Maybe the v4l2 muxer/demuxer isn't enabled in...

I need to make some updates if we want this to work with ffmpeg v4.4 onwards, otherwise you will get compiler warning messages since ffmpeg have deprecated the use of...

Going back to installing ffmpeg from source, i would install it to a local directory, not system wide. A whole bunch of things depend on libav libraries and if they...