Video Quality

At a high level, video recording seems to be mostly similar. Both the iPhone 5s and iPhone 6 continue to rely on EIS for video stabilization, both seem to use somewhat similar optics and sensors, and both can only shoot 1080p video. However, the details are really where we see improvements in the iPhone 6. For starters, the iPhone 6 now has 1080p60 video support, which is definitely helpful for improving spatial resolution and general performance. There's also 720p240 slow motion video, which is an addition to the 720p120 video that we saw in the iPhone 5s.

Video Encode Settings (Approx.)
  iPhone 5s iPhone 6
1080p30 17 Mbps High Profile H.264 17 Mbps High Profile H.264
1080p60 - 27 Mbps High Profile H.264
720p120 27 Mbps High Profile H.264 31 Mbps High Profile H.264
720p240 - 42 Mbps High Profile H.264

As you can see, there's really not a massive difference in encoding bitrate, at least for the standard video record settings. However, even casual examination shows just how big a difference there is when comparing video from the iPhone 5s to video from the iPhone 6.

While the YouTube compression is likely to make it hard to see whether the iPhone 6 really has better video quality, when viewed at full resolution with Quicktime it seems that there is some level of improvement, but this could be due to the smaller field of view that is used when compared to the iPhone 5s. This tighter FOV also seems to be part of the reason why the stabilization is more effective than before. At various points in the video, it's quite obvious that the iPhone 6 is also benefiting greatly from PDAF as we see seamless transitions throughout the video and consistently better focus while the iPhone 5s is locked from the start and would require multiple taps to refocus the video.

1080p60 brings significant improvements to temporal quality, as capturing fast motion is noticeably more fluid when compared to 1080p30. Video stabilization is also retained, which makes 1080p60 an easy choice when capturing fast-moving objects.

As with the iPhone 5s, the original video on NAND is saved to play back at either 120 or 240 fps, but on the phone and when uploaded to social media the slow motion versions play back certain parts at 30 fps. As far as I can tell, there's relatively little difference in the image quality between the two modes, but this advantage is unlikely to hold when in lower light situations as the frame rate inherently caps the exposure time.

Camera: Still Image Performance Audio Quality
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  • annah_souls - Tuesday, October 28, 2014 - link

    Yes, it's my money and I have a lot of them to buy as much as iPhone as I like. If you don't satisfy Apple product, you may not but $2000 handbag also. Pity you to yell Apple "The world is not fair!" LOL Reply
  • Donkey2008 - Wednesday, October 29, 2014 - link

    People with intelligence don't buy purely on specs, which it seems 100% of Android owners do. I can just picture you like the many Android fanboys I have met....."Deeeerp, it has foure cores witch iz twice as mony as en iPhone so itz twice as fast, Deeeerrp".

    Enjoy your clunky, resource-hog, half-baked Google OS, your extremely inefficient hot-and-crispy quad-core space heater SOC (which has to be throttled by Android so the phone doesn't melt LULZ) and premium plastic-wrapped junk.
    Reply
  • leonhk1 - Wednesday, October 29, 2014 - link

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  • iphone 3 - Friday, October 31, 2014 - link

    I am wondering if you guys have similar analysis for ipad air 2 A8x Reply
  • odedia - Tuesday, November 04, 2014 - link

    Please check the NAND differences between the 64gb model and the 128gb model. It appears the 128gb model uses TLC and not MLC. Reply
  • curiosity - Thursday, November 06, 2014 - link

    output power / voltage: per channel or combined? Reply
  • sellcheapli - Monday, November 24, 2014 - link

    Apple iPhone 6 - Plus 4G 16GB , 64GB , 128GB (Grey,Silver,Gold) ... $600 Reply
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  • raj parihar - Tuesday, November 03, 2015 - link

    mcf doesn't have any Multiply operations. In A8, its benefiting from a better (tuned) prefetcher possibly with negative (-3 or -1) stride. Reply

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