Video: Support Changing UDP URL

[HTRamsey]

Replace #10974

[HTRamsey]

@DonLakeFlyer do you know why we specify "MPEG-TS (h.264)" everywhere? I don't see a reason why h265 isn't supported - the plugin supports it: https://gstreamer.freedesktop.org/documentation/mpegtsdemux/tsdemux.html?gi-language=c

[DonLakeFlyer]

do you know why we specify "MPEG-TS (h.264)" everywhere?

nope

[hamishwillee]

@DonLakeFlyer do you know why we specify "MPEG-TS (h.264)" everywhere? I don't see a reason why h265 isn't supported - the plugin supports it: https://gstreamer.freedesktop.org/documentation/mpegtsdemux/tsdemux.html?gi-language=c

Probably because it was the only option in MAVLink for a long time. We added VIDEO_STREAM_ENCODING_H265 in the last year and at the same time separated the type of stream and the encoding in https://mavlink.io/en/messages/common.html#VIDEO_STREAM_INFORMATION

[DonLakeFlyer]

Sorry @hamishwillee I know next to nothing about the video stuff. I haven't ever had a video vehicle to work with so it's never been something I've dug into. It was all written by Gus Grubba and a contractor that Gus paid for ages ago. And then mostly maintained by the ArdSub folks who are mostly gone now. After 5.0 goes out I hope to acquire the parts for a video multi-rotor vehicle and bring myself up to speed on the whole thing.