Wayne from No Life Digital has posted a video to his YouTube channel showing how he got the Canon EOS R5 to record 4 hours of 4KHQ 30p video to an Atomos Ninja V before the camera overheated.
Simply by removing the memory cards from the camera while recording externally lead to a big boost in recording time. This seems like a pretty surprising outcome for something so simple. Is there some kind of software limitation in the camera?
A dummy battery was also used in this test.
The Canon R5 does not seem to overheat, externally, if you don't have any cards in the camera. In this video I show (with as much proof as I can), how I'm able to record up to 4 hours in 4KHQ 30fps, 10-bit CLOG, with IBIS and DPAF all on, with no issues like the blackout or screen off issue myself and Gerald were having.
The setup here is as follows – HDMI out of Canon R5, into Atomos, out of Atomos, into ATEM, out of ATEM, into OBS on the PC. This is no different than Geralds live streaming setup, and showcasing the times you can expect as if you were recording on the Atomos. This was to record for this long period of time, without the MASSIVE Atomos file, and still show the camera was in fact running for the entire time.