Picked up one of these video out boards for the gopro.
Only basic testing so far, but i have not had any issues as some people report when using the side usb video out. No lag or lockups at all. Plus it charges my camera while in use.
Only issue right now is the large amount of screen real estate the gopro osd uses. But i think that can be disabled.
5000mah battery -> jst-hx to jst harness (sometimes called a lighting harness) -> Power filter (remove ESC/Motor interference) -> immersionRC 600mw vTX –> gopro
Here is the gopro 3 black OSD displayed on a 17″ wide screen car lcd tv. The resolution settings really make a difference on how good it looks. Need to make sure the ratios match between display and gopro output. I.E. 16:9 and 4:3
purchased from getfpv for around $20. Website reports this back 30pin port is the same on all series of gopro, but i havent tested.
On my Xbox 360 I use a nice set of over ear gaming headphones. They can connect via 2.5 headphone jack and RCA Left and Right straight out of the Xbox. With Xbox One you can use HDMI and/or Toslink spdif digital. Now, BF4 is not very conducive to a sleeping toddler FYI, so I had to turn my volume way down or off. Neither of which is good for hearing gunfire or a tank about to run you over.
I found a nice solution on newegg. Its a $15 digital to RCA adapter. Very small, quiet, and uses hardly any power. One issue is that you do not have any control over volume with this setup. In my case the headphones have a volume control, but as far as just getting the sound to RCA it works great.
Optical Coax to Analog RCA Audio Converter With AC Power Adapter US Standard is Designed for Either Home or Professional Audio Switching
Now Microsoft just needs to get the third party audio working so I can use my headphones mic.