Video Performance

By moving from the 4:3 8MP sensor in the Nexus 5 to a 4:3 13MP sensor, Google has been able to enable UHD (3840x2160) video recording on the Nexus 6. Google can also benefit from improvements in Snapdragon 805 allowing for higher quality video encoding. With Snapdragon 805 only capable of HEVC decode, we're still looking at H.264 encoding on videos for the current generation of devices. Unfortunately, Google does not include a 1080p60 recording mode on the Nexus 6, so both 1080p and UHD recording modes are at 30fps.

For 1080p content the Nexus 6 encodes with an average bitrate of 17Mbps and uses the Baseline H.264 profile. I don't know why Google isn't using the Main or High profile for their video recording, as Baseline is typically used in applications like video chat where quality isn't a big concern. I have no complaints about the quality of the video itself, although the OIS doesn't do as much to reduce the shake in the video as I imagined it would.

UHD video is encoded with an average bitrate of 42Mbps, and is again Baseline H.264. Compared to the 1080p video there's a significant increase in overall detail, particularly with the branches of the trees and smaller objects like leaves on the ground which tend to show up as large blurry areas in the 1080p footage. Something I noticed when testing the UHD recording on the Nexus 6 is that it has a tendency to drop frames, which is demonstrated in the video below.

As you can see, there are a few areas where the video framerate dips below 30fps during a fast movement, and several moments where the video will stop and then skip forward. I haven't been able to determine a cause for this, but Samsung and other OEMs have been able to do UHD recording at 30fps on their devices that use essentially the same hardware as the Nexus 6 which leads me to believe it's an issue that is rooted in software.

Camera: Still Image Performance Software: Android Lollipop
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  • darkich - Friday, November 14, 2014 - link

    Good observation.
    Now I just wish Display Mate tests the Nexus and reveals the power consumption of the screen.

    AMOLED is inherently power hungry on white background surfaces(browsing) and even the latest generation doesn't alleviate that weakness.
    I can only guess how bad can it be combined with the screen used for Nexus 6
  • grayson_carr - Thursday, November 13, 2014 - link

    In addition to newer, more efficient, AMOLED tech in the Note 4, I'm wondering if Samsung throttles down the CPU more aggressively on their phones to save battery. Maybe that is the real cause of the TouchWiz lag and frame dropping as well?
  • darkich - Thursday, November 13, 2014 - link

    Lag and frame drops on the Note 4?
    Go watch and read some reviews and let me know if you find some of that
  • HisDivineOrder - Thursday, November 13, 2014 - link

    "Nexus 7 (16GB, Black, Wi-Fi only) is no longer available for sale."
    "Nexus 7 (32GB, Black, Wi-Fi only) is no longer available for sale."

    Check Google Play.

    Thus, it is untrue that "[t]hat hasn't changed at all in the past few weeks. The Nexus 5 and Nexus 7 are both still available, and they still provide a very high quality experience, arguably better than some other smartphones that are both newer and more expensive." It has changed. The Nexus 5 and 7 may be available in other places for the time being, but Google is clearly replacing the Nexus 5 and 7 with the Nexus 6 and 9. So the entry price point (and entry size point) are decidedly different with the official Google experience than they were.

    Hell, even the Nexus 9 shipped days ago and most of us are still waiting on the Nexus 7 to be updated. So not even your statement that we bought the Nexus device to get the OS ASAP is true anymore.

    I don't think I'm going to read your article any further since you're so obviously wrong about little things that make all the difference. How can your judgement of the Nexus 6 be correct if you aren't even correct about verifying Google's replacement of the older Nexus devices? You probably aren't even judging the new versus the old in the context of full replacement, instead thinking that just because remaining stock are currently present at other stores that that means you're seeing Google keeping the product on the market.

    Removing the Nexus 7 in particular from Google Play the very same day that they listed the Nexus 9 on their official store is as close to confirmation as you'll likely get that there will be no more Nexus 7 soon.

    I'm sure your article is great, but when you don't know that Nexus 7 was replaced (not supplemented) I think your conclusion is destined to be wrong.
  • vwtodd - Thursday, November 13, 2014 - link

    Forgive the naivety but can the screen be re-calibrated with a future software update? Is this something that Google can adjust going forward?
  • grayson_carr - Thursday, November 13, 2014 - link

    Yes, it's very possible, but it's also very unlikely because they would risk annoying users who got used to and / or enjoy the punchiness and oversaturated colors. And if they were going to do it, they would have done it before launch. But if enough people complained to them and submitted feedback, they might consider it.
  • Taronga - Thursday, November 13, 2014 - link

    I'm a Nexus 4 and 5 user and have generally been extremely happy with the Nexus phones--so much so, that I preordered the Nexus 6 a week ago.

    I admit that I was already wavering a bit due to the size of the phone, but hearing about the (lack of) display brightness and accuracy, battery life, and the missing notification light have made me decide to skip the phone.

    I contacted Motorola yesterday to cancel my order (which only took 50 minutes on hold with the philippines call center) only to be told that I can't cancel a preorder!! Yes, even though my phone isn't due to be shipped for another 2-3 weeks, apparently Motorola has no way to cancel an order in their system. Motorola's way of "canceling" and order is to ship you a phone half-way around the world and then have the customer ship it back...
  • Delfang - Thursday, November 13, 2014 - link

    I find it ridiculous for not compare the battery life against Xperia Z3 when you included multiple variations of Galaxy S5.
  • Coup27 - Thursday, November 13, 2014 - link

    They haven't tested the Z3 so how can they include any figures?
  • foxingworth - Thursday, November 13, 2014 - link

    Not to get sidetracked, but I am disappointed to see that the Lumia 930 WiFi performance got added to the database. That review was a joke. That reviewer connected the AC-compatible phone to an N router and called it good enough.

    Please remove that phone from the database so it doesn't get unfairly compared to the other properly reviewed phones. Us Windows Phone users have it bad enough.

    I miss Klug <3

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