Add support image save parameters in VideoWriter

[UnaNancyOwen]

This pullrequest changes

Add support image save parameters in cv::VideoWriter.
This change will become available setting same parameters as cv::imwrite() to cv::VideoWriter::set( cv::IMWRITE_*, value ).

e.g.

cv::VideoWriter writer( "img_%02d.jpg", 0, 0.0, cv::Size( 640, 480 ) );
if( !writer.isOpened() ){
    return -1;
}

writer.set( cv::IMWRITE_JPEG_QUALITY, 80 );

[alalek]

What is about params.clear();?

[UnaNancyOwen]

Oops! I will fix it. :)
I will squash the commits when you confirmed it.
Thanks!

[alalek]

Current documentation for VideoWriter::set declares this:

propId
Property identifier from cv::VideoWriterProperties (eg. cv::VIDEOWRITER_PROP_QUALITY) or one of Additional flags for video I/O API backends

Actually there is conflict by values between VIDEOWRITER_PROP and IMWRITE_ properties. So we need a properties remapping for this to avoid users confusing.

@UnaNancyOwen I have squashed your fixup commit, fixed problem with passed parameters (there is missing required 'stop' mark to limit number of properties) and append commit with proposed changes.
Please take a look.

[UnaNancyOwen]

@alalek Oh, It was necessary to add stop mark. Thank you for your advice.
I feel that checking parameters is a bit redundant. But, It seems necessary for many users. LGTM

[alalek]

👍