Sat Aug 08, 2020 11:29 am
The link to a 2014 blog post is seriously out of date - the Pi2 hadn't even been launched then.
Yes there are HDMI to CSI bridge boards available which can do 1080p50 on all Pis, although that is stretching the video encoder which is specced for 1080p30. Numerous threads on here, including a sticky at the top of this subforum.
There are HDMI to USB dongles available. They generally work OK on Pi4, but earlier Pis have a weaker USB interface. Typically they encode to MJPEG which may compromise quality as you'll need to reencode if you're wanting to stream (MJPEG is very inefficient).
Software Engineer at Raspberry Pi Trading. Views expressed are still personal views.
I'm not interested in doing contracts for bespoke functionality - please don't ask.