Video frame renderer should account for Sample Aspect Ratio

[caprica]

e.g. for playing DVD.

See caprica/vlcj#986.

It should be quite simple to port the solution from there.

[caprica]

Well, not so simple as the linked issue because the JavaFX solution is relying on certain ImageView behaviours (like preserveAspectRatio). So, a bit trickier indeed.

[caprica]

Probably need to manually calculate the scale and use imageView.setScaleX and imageView.setScaleY.

[caprica]

This is a bit trickier than in vlcj itself because the source image/buffer dimensions are not as readily available.