Severely frustrating, predominately use photo mode, as soon as video opportunity, switch to video mode 4K60, instantly overheat flashing, video mode unusable 99% of time. However, when testing out of housing, seems no issue. Any remedy? Suggestions?

I know that the well-known overheating problems with the R5 were fixed with firmware updates. They basically removed most of the first limits. It was quite embarrassing for them.

Here in the Mediterranean, I know people who use it only for video and have never had problems. What temperature is the water? What resolution and codec do you use?

6 hours ago, Davide DB said:

I know that the well-known overheating problems with the R5 were fixed with firmware updates. They basically removed most of the first limits. It was quite embarrassing for them.

Here in the Mediterranean, I know people who use it only for video and have never had problems. What temperature is the water? What resolution and codec do you use?

Appreciate your reply. Water temperature about 28 Celsius, Firmware 2.0.0, Trying to use 4K-U, 59.94P, ALL-I, using Delkin CFexpress 128GB 1730 read 1540 write. Any suggestions on how to avoid extremely frustrating overheat would be appreciated.

3 minutes ago, BrightSea said:

Appreciate your reply. Water temperature about 28 Celsius, Firmware 2.0.0, Trying to use 4K-U, 59.94P, ALL-I, using Delkin CFexpress 128GB 1730 read 1540 write. Any suggestions on how to avoid extremely frustrating overheat would be appreciated.

That's really strange.
Also, the aluminum housing should transfer heat almost right away, even if 28 degrees isn't cool.

I see you're using an ALL-I (Intra-frame) codec. This method compresses each frame one by one. You won't get small file sizes like with other methods, but the files are super easy to edit because they're not compressed much.

"Classic" codecs are all IPB, meaning the algorithm saves and looks at one frame (a picture) every so many frames. For the frames in between, it only keeps the differences, which saves a lot of space. The files you get are much smaller, Then, depending on how many predicted frames (the rebuilt ones) are in between, it's called Long GOP. When you edit, the software has to do the opposite process and rebuild all the frames. It's a power consuming process done by your GPU. It depends on you editing system.

here a simple explanation between them.

Going back to your ALL-I codec and files, the problem is that they're huge and put a lot of stress on your entire camera I/O system, from the processor to the CFexpress card. Try to film some minutes and immediately remove the card. You can barely touch it, it's hot as hell!

Long story short, what I'm trying to say is this: the difference in bitrate (how much data is used) and the stress it puts on your card and how much heat it creates, between ALL-I and IPB, are not small at all.

From Canon's website for the R5, I found these numbers:

• 4K (59.94p/50.00p) ALL-I: around 1000 Mbps

• 4K (59.94p/50.00p) IPB: around 340 Mbps

• 4K (59.94p/50.00p) IPB (Light): around 170 Mbps

IDK you use case, but I would immediately try switching to the IPB codec at 340 Mbps. That's one-third of what you're using now.

Even on my vintage GH5M2, I have ALL-I codecs, but I've never used them because I'd always be buying storage. On the other hand, I've never felt the need for them because the IPB codecs are excellent. If you use CLOG, you directly get compressed H.265 10-bit 422 files.

Ciao

Thank you again! Your description leads me to believe there may be some hope to still use 4K/60, switching to IPB. Also, there may be possibility to simply use FHD, 59.94P, IPB. I hope hope hope, am able to use video. The other options, unaffordable, purchase new or add recording monitor which is expensive and added equipment. I have thought about selling, which I know I would get hammered on the price able to sell vs purchase price, additionally, perplexed on what to change to, something much smaller and nearly equally capable, having full manual control is absolute. Cameras change so fast these days, certainly not the Nikonos V days, or even SLR. Any change would be a multi thousand dollar cost again.

Let's be serious, the R5 is a fantastic camera, even used in big-budget productions. I'll buy it 😉

Many scenes from Ballesta's latest documentary about the mysterious circles in Corsica were shot with Roberto Rinaldi's R5, and he even records in RAW. Of course, the water temperatures are around 15 degrees Celsius there, but I know several people who use it professionally for land-based shoots, and since Canon released the updates, they've never had issues. Just search on the net.

Just out of curiosity, how long are your uninterrupted clips?

Indeed, R5 is supposed to be a very good camera, I am very satisfied with still images, on land, there seems to be no issue with over heating. My attempts are only half minute, sometimes is overheat warning, immediately upon switching from still images to video, blinking red camera warning. I thank you very much for the recording options, and yes, when using on land, the card gets hot, obviously heat generating process. I will do all I am able according to your suggestions in hopes will allow to capture some video. Makes sense it would help to change settings.

Did you set Auto Power Off Temperature: high?

Set Overheat Control function to “ON” (default).

IDK if 4K@60p in CLOG IPB can be recorded on a class A SD card. Usually CFExpress cards overheat more than SD.

I don't know which housing you are using but Nauticam sells an active cooling system for the NA-R5II housing. It's bascially an expensive set of one or two electric fans and a battery box.

6 hours ago, eocean-eu said:

I don't know which housing you are using but Nauticam sells an active cooling system for the NA-R5II housing. It's bascially an expensive set of one or two electric fans and a battery box.

Nauticam R5 housing, wonder if similar cooling system is available for R5 housing? I will go to website and look now. Thank you.

The other question to ask is if the firmware is up to date? - you may be missing some updates which are related to the overheating issue.

Just now, Chris Ross said:

The other question to ask is if the firmware is up to date? - you may be missing some updates which are related to the overheating issue.

Hello Chris, Firmware 2.0.0

6 hours ago, eocean-eu said:

I don't know which housing you are using but Nauticam sells an active cooling system for the NA-R5II housing. It's bascially an expensive set of one or two electric fans and a battery box.

Appears only available for R5mkII

Please, check these settings:

https://youtu.be/Im2Gxzo2qNk?si=T485L5ZHsM9HQcHz&t=191

Unfortunately, the R5 has had this known issue since it arrived. One of the biggest upgrades to the R5II centered around improved video cooling. As @Davide DB outlined, using the most recent firmware (which you have, although there is now a 2.1.0 for battery compatibility and IBIS, but nothing around heating) and reducing the data transfer via codec selection are the best options you have to use it as is.

Most divers I know who use the R5 for mostly video tend to end up with an external monitor/recorder. Moving the recording aspect to an external device removes the heat generating components from the sensor area. While this basically eliminates the common R5 video heat issue, it unfortunately is not a cheap solution.

Edited July 9Jul 9 by ChipBPhoto