Video Recording: Triple Cameras, 8K Recording?

Amongst the biggest hype features of the S20 series was their ability to capture 8K video. These are not only amongst the first mobile phones on the market to proclaim this capability, but they’re also amongst the first ever consumer cameras on the market, with the feature being previously just being available to professional equipment.


S20+ (E) S20 Ultra (E)
S20 Ultra (S)

Video quality on the phones on the main sensors and the usual 4K30 and 4K60 recording modes are excellent, with details and dynamic range being excellent. The above video samples this year remain in the default SDR recording profile, as Samsung HDR+ recording a “Labs” feature, and we saw it have quite the complication last year on the S10 series.

One thing I want to make note about the S20 Ultra is that a lot of people were complaining about focus issues of the camera, and I indeed also encountered that phenomenon, with some horrible results on the Snapdragon S20 Ultra (4K30 video sample). Fortunately, Samsung had already released a firmware update which fixed the issue on the Exynos model, and the sensor’s new PDAF system almost equally as fast as the dual-pixel PD of the Galaxy S20+.

A new video recording feature of the S20 series is the “Super Steady” mode. This mode is limited to FHD resolution and uses digital stabilisation to produce – well, a super steady video recording. The quality here however isn’t great, because what the phone is actually doing is cropping into a stabilised frame of the Ultra-Wide-Angle camera module, not being able to use the other camera modules at all even though the UI is a bit misleading in allowing you to switch between wide-angle and ultra-wide-angle perspectives.

Before going into the 8K samples, we have to talk a bit about how the phones actually achieve this. On the S20 Ultra, 8K recording obviously only is able to be done through the primary 108MP camera sensor as it’s the only unit with sufficient resolution to actually support it. The problem is, that the camera sensor isn’t able to super-sample the 8K video recording across the whole camera sensor, and instead uses a 1:1 crop of pixels of the sensor. Because the sensor’s native resolution is 12000 x 9000, it means it has to crop quite a bit to end up at the 8K video recording resolution of 7680 x 4320, resulting in a narrowed field-of-view, as you see in the above superimposed snapshots of the different video modes.

The S20+ on the other hand uses the secondary wide-angle module – again that’s simply because it’s the only module that is sufficiently high resolution to support the 8K resolution. Its native resolution here is only 9248 x 6936, meaning that it only has to crop a relatively smaller region of the sensor to fit in the 8K video frame. It means that the S20+ actually has a wider 8K field of view than the S20 Ultra, which I actually find to be much preferable for most use-cases.


The funny thing is that I have a hard time evaluating the video quality as currently I don’t even have any display in the house that’s able to natively display the full 8K video. If you’re lucky enough to have an 8K TV at home, I probably recommend casting the YouTube video to that device. For us mere mortals with 4K displays, all I can say is that the video looks absurdly sharp, and almost every frame of the video is almost the quality of a still camera capture.

Usually you’re used to digital cropping to be a mess, but even at up to 6x magnification within the video things still astoundingly good. I noted focusing is a bit slower on all the phones, and the S20+ really didn’t like switching over to close objects. Taking a few steps back did help the phone find its bearings.

Overall, the results are just outstanding, and I’m looking forward to what people will be able to achieve with help of professional video editing and camera work.

Speaker Evaluation

The speakers on the S20 series have undergone a rather drastic redesign, most of it due to the phone’s front camera design. Because the front camera is now at the centre of the display, Samsung was no longer able to house the earpiece speaker right next to the usual earpiece grill location. On the S20 series, the actual speaker is now located below the front camera, with an audio channel leading to a sliver thin gap between the display glass and the device’s frame. This fundamentally changes the audio characteristics of the phone, and it’s not all positive.

Speaker Loudness

The biggest change is the fact that the new earpiece speaker is extremely loud, but also weirdly enough not very front directional. Holding the phone one-handed in portrait mode the phone doesn’t sound as loud as the S10+, but as soon as you hold it in landscape and use your palms as natural cups to focus the audio, the full brunt of the earpiece speaker is focused towards you. Interestingly enough, the smaller S20+ here becomes significantly louder, more-so than the S20 Ultra.

Speaker Stereo Bias

The new earpiece also largely overwhelms the bottom firing main speaker when it comes to loudness. The new speaker here is significantly bigger than that of the S10 series, and it has a fuller frequency response, particularly in the high-ends.

What this means that for generic pink noise and most other audio, you’ll have the impression that there’s a heavy bias towards the earpiece speaker, the complete opposite of what we’re used to as traditionally it’s been always biased towards the main speaker.

In terms of the actually audio quality, it’s still excellent, but it does have a different audio signature. The high-ends are a lot more pronounced on the S20 phones, which might need some getting used to.

The S20+ and the S20 Ultra also have somewhat different sound. Compared to the S10+, the S20+ definitely loses some “fullness”, and that’s due to the weaker low-mid ranges. The S20 Ultra is able to maintain more of these frequencies, and it sounds better than the S20+, more familiar to the sound of the S10+, but with the added clarity of the new more pronounced high-ends.

I do think that Samsung should tone down the earpiece speaker a bit - its high-end frequencies are maybe a bit too much and it just is a bit too loud in relation to the main speaker – particularly on the S20+. I could see some people being put off by the audio signature here as it is more tiring that that of the S10+.

And of course, I have to complain about the new phone’s lack of a 3.5mm headphone jack. With Samsung being the last major flagship vendor dropping the jack, it’s a nail to the coffin for the audio connector. Not too much to add here other than I’m disappointed in how things have devolved – all in the name of selling more accessories.

Camera: Low Light Evaluation Conclusion & End Remarks
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  • MAGAover9000 - Tuesday, April 7, 2020 - link

    I have the s10+. Fantastic device. Very happy
  • id4andrei - Friday, April 3, 2020 - link

    No need for me to praise this review any longer. Still, I must nitpick. The 3dmark GPU test always has caveats in your reviews. Drop it if you feel it is detected by OEMs or it's a false GPU test like the physics one.

    On web tests. I read on wiki that JetStream is an Apple made test, literally. Wouldn't you say that's a big caveat when testing against ios? Similarly Speedometer is developed by the webkit team at Apple. With Android webview based on Blink, not webkit, wouldn't Android smartphones be at a disadvantage against iphones? I don't see Kraken(Firefox) or Octane(Google) being used.

    Kraken would actually be neutral to both. Other 3rd party tests might be Testdrive(Microsoft) or Basemark.
  • Andrei Frumusanu - Friday, April 3, 2020 - link

    I don't think that the fact that the WebKit team made those tests is a valid argument against using them. You can go and read the source JS yourself if you wish, and they're industry accepted benchmarks. Both Kraken and Octane are ancient and outdated and we dropped them just like we dropped SunSpider of the early days.
  • id4andrei - Friday, April 3, 2020 - link

    Thank you for the prompt answer.
  • s.yu - Friday, April 3, 2020 - link

    Thank you Andrei, again the most comprehensive and reliable set of samples anywhere!
    There seems to be considerable sample variation again (last time with Samsung was the main module since S9 with the variable aperture) in the UWA, S20+E and S20UE should have absolutely identical UWA performance but the S20UE seems to have far worse sagittal resolution than the S20+E, and Samsung's processing isn't that good in the first place, considering the 12MP 1.4μm could produce incredibly sharp pictures as that been the specs of the Pixels' main module for generations.
    I don't regret their switch to f/1.8 because the old module that went up to f/1.5 wasn't sharp wide open, especially in the corners, but a further two stops' variation to f/3.3 could be useful for more DoF in closeups provided inserting that physical aperture into the tiny module doesn't compromise the optical design otherwise.
    This time around the E seems to generally outperform the S, except in color as E doesn't seem to have proper color fidelity...almost as if chroma NR is set too high even in broad daylight, and the "hybridization" of the digital zoom, in which the E clearly uses a smaller portion from the periscope's readout than the S in the resulting merge. Speaking of the zoom, S20+ still performs slightly worse at 2x(16MP readout) than S10's native 12MP, though the difference is small and could be down to lens variation. Considering S10U's Z height, they could've easily fixed the S20U like Xiaomi, going 1/2.3" f/2 12MP with the 2x. Xiaomi used it despite a 4-1 bin, all the more reason to use it with a 9-1 bin. S20U's corner performance at 3x would also be much improved.
    Regarding the comparison with the Fuji though, I suspect your unit has trouble focusing to infinity correctly, because the train and forest samples show clear superiority of the Fuji's zoom. I especially recognize that kind of slight haziness as being very responsive to dehaze and low radius sharpening in LR and would result in far more detail with extraction in post. Also, with an ILC, there's always stopping down a little for more sharpness and more DoF.
    Regarding the full res modes, it's not worth storing 108MP of data with the CFA asking for a 9-1 bin, of course the 64MP would be better, without the RAW it's hard to say for sure, but the 64MP seems to be quad bayer.
  • s.yu - Friday, April 3, 2020 - link

    I don't agree with your remark about the night comparison with Mate30P though, the UWA is not "UW" so it has better image quality, that's true, and the night mode of the Mate30P is far superior, that's also true, but not auto mode, nor any aspect of the telephoto as it's clearly using a crop of the main for 3x. Samsung does attempt to use the 4x for telephoto and although there's a significant issue of chroma noise, it's far sharper than Mate30P's crop, with at least twice 3 times the effective resolution in night mode. With S20U you could also crop out a single shot 3-4x of similar brightness to the Mate30P crop, but it's just a crop.
    As for the potential of P40P surpassing S20U, that model operates on a 9.4MP crop by default, interpolated to 12.5MP which clearly has consequences. In daylight it's often a regression compared to P30P (much less match Mate30P), and in night shots using the current firmware it has severe color issues of rendering large portions of the scene as a crimson red, so it's hard to say at this point too.
  • s.yu - Friday, April 3, 2020 - link

    Oh, there's exception of the Mate30P auto mode in the last sample, but the night mode isn't constantly superior either.
  • RealBeast - Friday, April 3, 2020 - link

    I've been looking forward to getting one of these, not sure which yet. The fly in the ointment now is that I won't see my Mom (who gets my old S9+) until the Fall due to the whole COVID problem, not to mention less income. That will weigh heavily on sales of what is otherwise an amazing looking phone for me.
  • 29a - Friday, April 3, 2020 - link

    How large are the picture file sizes created by this thing?
  • BedfordTim - Sunday, April 5, 2020 - link

    The same size as any other 12MP camera. They will depend on content, hdr, motion and compression options but I would expect about 36MB for a raw image and 8MB for a high quality jpeg.

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