Sony Xperia Z2 won't let you record more than ~5 minutes of 4K video (and neither will Note 3 and S5)
posted by Ray S. / May 29, 2014, 8:46 AM
However, it turns out that these phones, even though they are officially capable of recording 4K video, cannot deliver an experience we'd consider truly adequate. Why? The answer is simple: they cannot record more than 5 minutes of footage in 4K resolution.
Now, that issue probably isn't so huge for most people, because no one is really going to capture full-length movies with their smartphones, but still, 5 minutes is a relatively short limit. There are many cases where we start recording a certain event on video, and we often don't know exactly how long that event is going to continue. Obviously, in those situations, the current 4K video support just isn't going to cut it.
Up until now, we weren't completely sure why manufacturers are limiting 4K recording to the 5-minute mark, but Sony's Xperia Z2 might have revealed the answer. While Samsung's Galaxy Note 3 and Galaxy S5 are strictly limited to 5 minutes by their camera apps, the Xperia Z2 doesn't have such a software-defined limit. However, it appears that the Z2 determines when to put an end to your 4K recording session based on the temperature reached by its internals. In short, when things start getting too hot in there, the built-in camera of the phone decides that you'd be better off with a short and potentially ruined video, rather than an overheating phone. We tend to agree, though this raises the question if such a half-baked feature should be included at all.
Starting a recording session from a normal state (idle temperature), and in a room that's air-conditioned to about 77° F / 25° C, the Xperia Z2 usually manages to keep recording for just under 5 minutes. At this point, it gets too hot and the phone shuts the camera app down. If we start a second recording, right after the first one has been terminated, the Z2 would hardly record more than a couple of minutes of 4K video. We've measured the temperature while recording 4K, and the phone's exterior gets very hot indeed, with the glass surface on the back side reaching about 111° K / 44° C. Interestingly, the Note 3 and S5 don't get nearly as warm when recording 4K, but that might be due to their materials not dissipating heat so well.
It's important to note that it's only the temperature of the phone that the Xperia Z2 takes into account when determining when to terminate the recording. There is no fixed time limit as on the Samsung phones, or if there is, it has to be much longer. We figured that out by starting a 4K recording and placing the Xperia Z2 right in the way of the flow from the air conditioner. Utilizing this external source of cooling, the Xperia Z2 successfully recorded over 10 minutes of 4K video and kept on going. Of course, there's always the storage space factor, as a 10-minute 4K video from the Z2 came in at the whopping 4 gigabytes!
And there you have it - current-gen phones cannot be used for 4K video recording of more than about 5 minutes (you obviously can't bring an air-conditioner with you while out and about). As you can imagine, there are solutions for rooted phones that can bypass those time and temperature limits imposed by manufacturers, but we wouldn't really advise you to take advantage of those, if you don't want to risk frying the precious silicon inside your phone!
Posts: 33; Member since: Mar 05, 2014
heeheee Thats it ... getting hot always will be our problem
posted on May 29, 2014, 8:50 AM 4
Posts: 3902; Member since: Feb 04, 2013
Plug in 20TB hard drive then shoot 4K....oh yeah carry on.
posted on May 29, 2014, 1:14 PM 1
Posts: 621; Member since: Sep 23, 2013
Yeah because nowadays people so fond of 4k recording will at least need a 500GB memory to record some crap videos of their precious events which after they will never watch of course! Common Joe is so weird! I record only 720p or 480p videos @super fps which I concluded has better video results! Once asked a friend a video about 5 min and it was 2 GB in 1080p! How I'm supposed to share that vid?? And they say 4k is futureproof!!! Clearly they don't record videos at all!
posted on May 29, 2014, 2:02 PM 1
Posts: 2138; Member since: Jan 16, 2011
What phone arena fails to say is that the Note 3 and S5 dont get boiling hot and shut down like the Z2. The Note 3 and S5 is limited to 5 minutes of recording but you can simply start recording again, and again and again without issues.. Not sure what FUBAR Sony did with the Z2, but it gets extremely toasty, even recording 1080p for more than 6-7minutes
posted on May 29, 2014, 5:30 PM 1
Posts: 201; Member since: Mar 17, 2014
So that's the reason why G2 preferred 1080p@60fps rather than 4K. Hope G3 has an answer to this problem.
posted on May 29, 2014, 9:00 AM 1
Posts: 1914; Member since: Dec 07, 2011
Same happens with the GoPro Hero3 and 3+. The device gets pretty warm when recording in 4K and in RAW mode. It'll be a while till the processors and viewing outlets will catch up anyway so no real need for 4k yet.
posted on May 29, 2014, 10:33 AM 0
Posts: 582; Member since: Jun 28, 2012
Who needs 4K? Among all people only 1% of us own a 4K TV.
posted on May 29, 2014, 9:05 AM 2
Posts: 5498; Member since: Aug 05, 2011
Maybe not today, but tomorrow, it is future! Not all people are buying phone for one or two year, some are buying it for three or even four years and it will be a future proof for them, people may keep 4K videos for a future. It doesn't hurt to have ability record 4K video it is advantage not disadvantage. If you don't like it you can change settings and record video in HD or FullHD.
posted on May 29, 2014, 9:15 AM 3
Posts: 5498; Member since: Aug 05, 2011
4K TVs and projectors are already here and you are already able to buy them ofcourse if you want and if you can afford them. And if they are too expensive for you then it is your own problem wich doesn't make 4K technology into a gimmic.
posted on May 29, 2014, 9:40 AM 0
Posts: 3535; Member since: Dec 21, 2012
I recorded 3 minutes of 4K. It took 1,3 GB of storage space. lol. BTW it's funny how that warning message asks if you want to close the app. Then only gives 1 answer which is "yes" lol
posted on May 29, 2014, 9:05 AM 10
Posts: 2944; Member since: Jun 19, 2012
4K is still very unnecessary for me... 1080p is more than enough for the next few years
posted on May 29, 2014, 9:06 AM 4
Posts: 592; Member since: Nov 15, 2013
No, you don't see 4k in action.
posted on May 29, 2014, 10:11 AM 0
Posts: 87; Member since: Aug 14, 2013
i dont see anything wrong with this even laptop, desktop and engines get really hot member cell phone does not have any fan that kicks in when its internals get to hot like the other examples i give its best this way so u wont complain that your precious device is fried
posted on May 29, 2014, 9:06 AM 1
Posts: 45; Member since: May 31, 2012
the major problem of android you can't record more than 4gb OR 5 minutes 4k of videos. No matter how good your smartphone are. IF samsung, sony or others not change the storage to NTFS format. The smartphone became a bit useless,IMO. 4k recording just gimmick.
posted on May 29, 2014, 9:12 AM 1
Posts: 44; Member since: Apr 21, 2014
Ever heard of exFAT or ext4 or F2FS?? These 3 don't have any 4 GB limit. The 4 GB limit you are talking about is a technical limitation of FAT32 NOT ANDROID. But as they say, haters gonna hate!
posted on May 29, 2014, 1:21 PM 3
Posts: 45; Member since: May 31, 2012
yes.. I heard those things..IF you're correct, why u don't try recording some 4K video over 5 minutes with third party apps on google play store.IF your phone have this option. I bet you phone also cut after reach 4GB. Android systems not perfect even for true multitasking. why? simple task, 2 songs can not be play in one android device.
posted on May 29, 2014, 4:59 PM 0
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