This is a pretty cheap and dirty way to capture HDMI A/V output on your SBC. All you need is a cheap($10-$18) HDMI to USB capture device(UVC), and in this case, an Edge and an Edge-V. Of course, the same device can be used to capture to Windows or Linux PCs, but that is for another forum.
The capture device claims to support capture at 1080p@30FPS Not sure about that, but was able to capture 1080p@25FPS(So says Kodi ). Hollywood will have no use for the quality of this capture, and gamers may be disappointed, but many may find it useful. Latency is pretty good for a cheap capture device. The quality of the captures, or lack thereof, can be seen in the examples below. Capture quality is suitable for capturing How-To or demo videos of stuff you do on your SBCs.
Just to note, my Edge+Captain is running a custom Android TV ROM by ROM developer mo123, but should work on others too.
I used this app on the Edge+Captain, but others may also work.
Here are a couple of the capture examples. Note: I did capture a bit of the Khadas Youtube videos for example, I hope I don’t get sued.
It goes without saying, the Edge-V’s HDMI output connects to the HDMI input on the adapter, the adapter is USB connected to the Edge+Captain.