herein2020

It could be the firmware causing the issue. If the firmware reading the internal temp is faulty or buggy then it would yield similar results...similar to battery meters that never seem accurate. After seeing the R5 circuit board I think there is no way to actually fix this problem until the R5 Mark 2, but I do think it was the firmware preventing the camera from working properly 5hrs later.

I was able to smoothly play the Canon R5 4K120FPS footage within DR using both a 1080P timeline and a 4K timeline.  The caveat there is that it stuttered at the very beginning then it played smoothly, I'm not sure if behind the scenes DR was cheating a bit and doing some sort of caching; but my system actually surprised me, it played smoother than some of my GoPro and Drone footage.
 
I tested the footage on both a 1080P timeline and a 4K timeline and playback was still smooth. My system is an HP Z4 with Windows 10, Core i9 14 core CPU, a RTX 2080TI video card, Davinci Resolve Studio, 64GB of memory, and NVME RAID array for the project drive.  I haven't tested the Sony footage yet because it is still downloading, I wish they had broken it up into individual files so that I could download just one.
 
One thing that I couldn't tell from the YouTube videos is if they were using DR Studio or the free version, you don't get HW acceleration in the free version.  My build is probably around $6K so well below the $15K MAC system in the video. So I went a step further and color graded the clip and DR was still smooth. I do feel like it was at the edge of what it could handle, and would probably require proxies for any kind of real work with this footage.
 
Another annoying thing is you will definitely need proxies if you want to do any kind of speed ramping with the footage, when I tried to bring it up to normal playback speed it was unusable.
 

Skin tones and colors is why I really want a Canon product to work for me. My GH5 takes so much work in post to get the skin tones right...and if there is a hot spot from lighting forget about it. My 5DIV has incredible skin tones and highlight rolloff I can only imagine the R5 and R6.....but the overheating problem really killed it for me. If I can't completely replace my GH5 with the R5 or R6 then I'm not going to get one; and right now there is no way I would trust either of them to do what my GH5 does.
I would love to reduce my kit to a C200 for long form, R5 for photography, and R6 for B-cam and hybrid photo/video shoots....but it looks like I'll need to wait on the Mark II versions for that to happen and knowing Canon that could be 4yrs from now.

Incredible addition....I really wish they had a better lens ecosystem, a better photography story, and better AF. In every other way though Panasonic keeps proving they really should be the market leaders in the semi-pro/pro video world. The S1H has every feature I have ever asked for....yet for some reason I am still sitting here waiting for Canon to get their act together.

Incredible addition....I really wish they had a better lens ecosystem, a better photography story, and better AF. In every other way though Panasonic keeps proving they really should be the market leaders in the semi-pro/pro video world. The S1H has every feature I have ever asked for....yet for some reason I am still sitting here waiting for Canon to get their act together.

I might get R6 instead, the Sony yellow is still there on A7SIII, and R6's quality is way sharper than A7SIII in 4K, much better IBIS.
 
at 25600 ISO R6 still as clean as A7SIII and sharper.. you barely can read the text on A7sIII but R6 is really clear

For me that camera is DOA if that is how it performs in the real world. My GH5 has NEVER overheated and it regularly shoots after sitting in a 120 degree car, in hot direct Florida sunlight and nearly always at 4K60FPS.

That is not exactly correct either...Canon did not mention overheating for those modes at 23C. At 35C here in FL it probably wouldn't even take pictures.

Very disappointed, it looks like I'll need to wait another 2yrs for a Canon hybrid gimbal camera. No way am I touching the R6 the way it is now. It is clearly photography first and video if you are doing a documentary in the Antarctic. So far this camera seems worse than the EOS R for video at least the EOS R doesn't overheat, and I'll take a single card slot and horrible FN bar any day over a dead camera.

1Dx III so same format as R5 
 

I'm too disappointed to buy either one. Until Canon removes that ridiculous 30min recording limit and offers backup video recording neither of these cameras can replace my GH5.  If they do add backup recording and remove the time limit from the R6 and the thermal issues prove to be not as bad as it sounds then I'll probably at a minimum get two R6's to replace the GH5 and maybe an R5 to replace the 5DIV.

I love the DPAF on my 5DIV and couldn't believe how natural the AF looked and it is probably light years behind the R5 and R6.  The AF on my C200 which also uses DPAF is great as well. I am sure the R5 and R6 will be even better. I didn't even discover my 5DIV's video capabilities until I went on an overseas vacation and did not want to lug around my GH5 and 5DIV so I only took the 5DIV for pictures. So mid vacation I decided to record a few short clips and the quality blew me away.  I started out in MF since that's what I'm used to but there was too much fast moving action so I switched to AF just to see how bad it would be and it was like rediscovering AF all over again.
Then I got back home from the vacation and it was like rediscovering Canon's color science all over again. Mind you this is all just 1080P since I will never record in the 5DIV's horrible MJPEG, I can't imagine what 4K out of the R5 or R6 will look like.

That's a lot of testing but do you want to know what I do? I have a GH5 also, I shoot nearly everything in 8bit 4:2:0 LongGOP 4K 60FPS and deliver every project in 1080P with a 16MB/s or 8MB/s bitrate and not one paying customer has complained about the video quality. I used to go through the same hand wringing over quality until I realized I'm not creating Hollywood blockbusters, my footage is going to be totally trashed by YT compression, and my clients will never notice the difference; they care about the content and have no idea where the quality could have been better.
I also have a C200 and have never shot a single project in RAW...everything is 4:2:0 LongGOP and my clients love it. For both cameras I avoid WDR scenarios whenever possible, I perfectly white balance the scene, and I shoot CLOG3 with the C200 and CinelikeD with the GH5.  Sure 10bit and RAW give you more latitude in post....but in most situations I have found that highlight rolloff and white balance are the two things that will make your footage fall apart in post if you are shooting 8bit. If you can get those right in camera you won't have any problems in post.
 
If I ever get a big time paying commercial gig in the 5 figure+ range then sure, I'll switch the C200 over to RAW and happily invoice the client for the extra storage and post processing time required or I might even go and rent something even fancier, but until then there is no way I am wasting my storage space, time, or equipment to improve quality that is impossible for the average viewer to see especially when 90% of them will view the footage on a tiny cell phone screen.
 

The problem with your logic is that all of the shortcomings are clear, well defined and can be easily worked around. I shoot with the GH5 nearly daily, everyone knows you need to nail the WB, do whatever you can to not shoot HDR scenes, keep the ISO below 1600, and always use MF....simple, clear concise and if you stick to those rules you can get quality footage every time. Oh and if you fail to follow any of those rules a simple retake can fix the issue or you may be close enough to fix it in post.
Overheating is completely different territory where you have no idea if a hot day in direct sunlight with multiple takes will render your camera a brick, if the fact you just pulled it out of a 120 degree car will prevent it from even turning on, and when it does overheat there is no workaround.....you are sitting around waiting for it to cool. No one is complaining that there is a limit (me least of all), the problem is with thermal limits there is no way to know what is going to push it over the edge; 
Will 20 or 30 rapid takes make it overheat? Will pulling it out of a hot car make it overheat within seconds vs minutes? Wil turning off AF and IS make it take longer to overheat? Will shooting a photography session on a hot day then switching to video push it over the edge? And why can't you use a $4000 camera or a $2500 camera for simple interviews? Who has lowered the expectations bar so low that you will accept the fact that your hybrid camera can't even shoot a 30 min event or interview, we are not talking hours like you are trying to imply; I've had simple interviews need multiple 20min takes and the GH5 was perfect for this. The S1H can, the S1 can, the GH5 can, even the EOS R can, and I'm sure the Sony's can...why does Canon's latest hybrid flagships get a pass?
Do you not see the difference yet in thermal problems vs easy to workaround well documented and well known limitations?

No AF definitely does not make a camera unusable; I guess Arri and Red should just stop making cameras since they don't have AF. I know on small budget shoots no AF is a real pain and that's why I was so interested in the R6 but to say no AF makes a camera unusable isn't even close to the truth. My GH5 has no usable AF and I have been shooting paying gigs with it for years. My C200 has great AF but I shoot in MF 90% of the time.  The only time I find AF useful for video is when shooting solo on a gimbal and even then I can usually get useable footage with MF. For me it's very hard to trust any AF system for important situations.
 
You did  imply hours and hours of unlimited recording is what it would take to require a different camera
No one is talking about hours of non stop recording. But to having to worry about overheating during a 30min interview is unacceptable in my opinion.
 

Since Canon chose to forego traditional recording limits and let the camera shoot wide open until it overheats. Shutdown due to heat can be considered a thermal limitation vs a firmware enforced limitation.
 
I have already stated why I am looking at the R6 (not the R5) but in case you missed it here is a more complete list:
 
Color Science - No explanation needed Lens compatibility - I have lenses from my C200 and 5DIV that I could use on the R6 Color Matching - While possible, it takes extra work in post to match GH5 to the C200 Photography - The GH5 is useless for photography, the R6 might be the only camera I need to bring to a hybrid photo/video shoot Ecosystem - I am already knee deep in the Canon ecosystem, the GH5 is an outlier that does not fit as well with the rest of my Canon gear Autofocus - No explanation needed  
This statement doesn't even make sense...for one thing I started this whole thread about the R6 not the R5 and for the other the only creative thing you can do when a camera overheats is find faster ways to cool it down.

So what happens when your camera overheats and shutdowns and won’t let you record? No image is the worst image.
I’m not a professional. But if I was taking money to do a job I wouldn’t feel comfortable using the R5 or R6 based on what I know at this time. It would require you to know exactly the cameras limits from extensive experience using it, especially since temperature records times are documented as being variable in the manual!
As it stands the R5 is a great camera for me because Im doing stuff for my own business that someone else isn’t paying me to do. It’s all on me and I suffer the consequences of my gear shitting the bed when I need it.
I’m also saying give the R5/R6 a chance! Doesn’t mean I don’t think the temperature and record limits are huge show stoppers for a lot of use cases out there, including YouTube and vlogging.

This doesn't make any sense at all. Crippled specs? That thing has every feasible recording option in conjunction with the tech it carries and is a proven workhorse camera. Canon should do their homework on what Panasonic achieved 4 years ago and deliver a better product.

So you do have good eyes and standards.  That's good.

Because at the end of the day image quality matters. 
Crippled specs is the same as paper specs.  A camera that's good on paper but the image quality doesn't match.
It's clear that lots of cameras passed the GH5 in color and image quality years ago.  The Gh5 is a suckers camera in 2020.  You see people on Facebook boards jumping into buy a $1,697 GH5 from Adorm$$ because the specs checks all the boxes.
Smartphones shoot 4k and even 8K.   Go use those because I'm sure RAW will be next.

I love the idea of the R6 but it does not record video to both card slots; there is no way I'm going to shoot a wedding with a single card or a major event with a keynote speaker with a single card, or pretty much any paying gig and have no backup. Profit margins in this business are razor thin and all it takes is one bridezilla posting all over the Internet that you lost her priceless wedding footage to tank your company.

Canon is so frustratingly close to perfection, one firmware update away from getting it right. I think 20MP is perfect, the 1DXIII has 20MP and it is in the hands of many pro shooters, in fact I think 20MP makes the R6 even more attractive since it will be a lowlight beast not to mention you can take stills using a $2500 body that is used in their $6500 flagship.  Most images these days end up on Instagram at 960x1200...that's only 1.1MP.

I don't even know what blog you are rereferring to or if you are even responding to the right thread. But no one is expecting a $2500 or $3500 camera to perform like one costing 20x as much. On the other hand, if a manufacturer puts features into a camera that make you decide to buy that camera then you find out you can't actually use those features because it will overheat....that is a problem. 
Would you buy a car that has amazing features but randomly shuts down half way to your destination depending on many factors that are beyond your control? Canon is known for stability, not innovation and I think this time around they chose to go all in on innovation which is great for them but I would take stability over innovation any day. My clients aren't going to care why we are all standing around when my equipment doesn't work, they are just going to hire someone else next time.

It's not even a campaign
Simply about reporting the facts
None of the major coverage initially mentioned any overheating issues. People were pre-ordering the camera under a false pretence.
So I had to put the facts on the blog rather than have that info stay hidden in the CVP video. You seem to be suggesting that I should shut up?
It's $3900 + tax. I expect it to do what a $3900 Panasonic S1H does - active cooling, 4K 10bit 422 unlimited record times. 6K or 8K is just a bonus. The RAW file sizes are unmanageable for longer record times so the overheating in that mode is only the secondary problem!
Of course, you can produce lovely work with the EOS R5.
It's will just be a shame about the moment on that shoot where great stuff is being captured up to the point where NOTHING is being captured because the camera got too warm.

I don't even know what blog you are rereferring to or if you are even responding to the right thread. But no one is expecting a $2500 or $3500 camera to perform like one costing 20x as much. On the other hand, if a manufacturer puts features into a camera that make you decide to buy that camera then you find out you can't actually use those features because it will overheat....that is a problem. 
Would you buy a car that has amazing features but randomly shuts down half way to your destination depending on many factors that are beyond your control? Canon is known for stability, not innovation and I think this time around they chose to go all in on innovation which is great for them but I would take stability over innovation any day. My clients aren't going to care why we are all standing around when my equipment doesn't work, they are just going to hire someone else next time.

I will start this off by saying I am a huge Canon fan, I recommend Canon gear to pretty much anyone starting out in photography and waited years for Canon to get their act together so that I could replace my GH5 with a Canon mirrorless for video gimbal work. Every spec that was leaked about the R6 seemed to indicate that it was going to be the no brainer replacement for my GH5 gimbal camera work....until all of the specs were revealed. I had only 3 real requirements for the R6 since I already knew it would have excellent AF, color science, and video codec options:
 
Dual card slot video recording - This was my number one requirement for the R6. I will never understand why a camera would have dual card slots then only record video to one of them. My C200 records to both, my GH5 records to both, why doesn't my 5DIV do the same, and now the R6 doesn't either in 2020? I've heard all of the people saying they've never had a failure, Hollywood cameras only record to a single card etc, etc. Well I have had a card reader completely corrupt an SD card after a full day of shooting and the second card saved the day; I will never pick camera that has no backup capability for video over one that does. I also don't understand why more people are not clearly highlighting this fact or the fact that nearly every competitor does have this feature. Unlimited recording time - Once again, it is 2020, why on earth did Canon keep the 30min recording limit due to some obscure tax law that only affects certain European countries? My GH5 has unlimited recording time, I use it all the time as a B cam for the C200 for interviews, conferences, long events, etc.  XLR audio module - this remains to be seen, but so far Canon has not mentioned any plans to release an XLR module for the R5 or R6. This is one of my favorite GH5 features, all of my audio gear uses XLR connectors and for run and gun situations I'll use the GH5 for the whole project including high quality audio capture. The GH5 is far from perfect; highlight rolloff is atrocious in WDR scenarios, the color science is a pain to grade in post, and of course my number one problem is the fact I need to use MF at all times when shooting with it which means I'm throwing away an unacceptable amount of footage and working overtime to keep the talent in focus during complex gimbal movements.
I had fully planned on pre-ordering the R6 when it was available but every single thing that is important to me is missing from this camera and that was before the overheating problems starting making the rounds. I live in FL where my gear regularly sits in 120+ degree heat inside of cars before the start of the project; I cannot afford to have a camera that overheats on set. My GH5 has worked flawlessly shooting at 4K60FPS in 98 degree heat, after sitting in a 120 degree car and never overheated. That's the type of reliability I have come to expect from all of my gear.
Now that the full specs for the R6 are available, the only thing it did was make me realize just how good the GH5 is and further appreciate its features despite it's downsides. I still have some hope that an R6 firmware update will remove the recording limit, add dual slot video recording, and Canon releases an XLR module. If they did that I'd be all in with Canon.