Ability to view H.264 streams

[Daltz333]

H.264 video streaming is getting all the more common, with tons of threads appearing on various online forums about using it in FRC. However, Shuffleboard doesn't have anyway to consume these types of streams regardless if it's from CScore or an external source with the URL published to NetworkTables.

It'd be useful if the video widget could be extended to have H.264 capabilities, a separate widget for consuming these streams is also acceptable.

In the meantime, users can open up a browser and navigate to the URL of the stream manually, however, this is clunky.

[132ikl]

For now you can use gstreamer_shuffleboard