1080 60 FPS too much noisy - Xiaomi Mi A2 / 6X Questions & Answers

I tried to make a video in indoor light in 4K and 1080, 60 FPS, is there a reason why 4K is much less noisy? I did not think that resolution decides how much noise is there.

4K provides you with almost 4 times the resolution of 1080P thus you will most certainly see a difference in clarity.
In running a quick test, at 1080P on the default camera app, it captures the video at a bit rate of 20.0Mbits per second.
In contrast, at 4K @ 30FPS, it captures the video at 41.9Mbits per second.
So the capture size versus the bit rate is certainly going to play a deciding factor.
But there are other ways to achieve an optimal capture rate @ 1080P.
If Xiaomi gave us the ability to utilize the High Efficiency Video Coding (H.265) and dictate our own bitrate, you'd see better capture rates @1080P.
My only other suggestion would be to seek out a third-party camera application (GCAM perhaps?) and test further.

A_H_E said:
4K provides you with almost 4 times the resolution of 1080P thus you will most certainly see a difference in clarity.
In running a quick test, at 1080P on the default camera app, it captures the video at a bit rate of 20.0Mbits per second.
In contrast, at 4K @ 30FPS, it captures the video at 41.9Mbits per second.
So the capture size versus the bit rate is certainly going to play a deciding factor.
But there are other ways to achieve an optimal capture rate @ 1080P.
If Xiaomi gave us the ability to utilize the High Efficiency Video Coding (H.265) and dictate our own bitrate, you'd see better capture rates @1080P.
My only other suggestion would be to seek out a third-party camera application (GCAM perhaps?) and test further.
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Is there an app that supports [email protected]? There is no point in recording videos [email protected] if there is 4K, but I like the idea of 60FPS.

Related

[Q] Possible to mod the camera to record in 1080p ?

Any devs looking at the possibility to record movies in fullhd, 1080p ? I seem to remember I read somewhere that it should be capable of it.
Well if it is capable of recording in full-HD then why wouldn't Samsung themselves implement it so to make more sales?
leoon said:
Well if it is capable of recording in full-HD then why wouldn't Samsung themselves implement it so to make more sales?
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Are we talking about the same company that decided to use rfs filesystem and use reserved memory thus limiting available ram... not to mention the weak wi-fi reception / gps issues.
INeedYourHelp said:
Are we talking about the same company that decided to use rfs filesystem and use reserved memory thus limiting available ram... not to mention the weak wi-fi reception / gps issues.
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Exactly my point, there could be a thousand of different reasons. But maybe our devs inhere are a bit sharper than Samsung themselves...
People have made mods that claim an extra 20 - 30 megabytes of RAM. When these are applied problems are noticed with 720p recording. Imagine the ram usage for 1080p. I don't think its worth the hassle.
1080p used in mobile phones do you think will be much better?
come on!
i dont think so...
Especially since the audio is still bollixed... if they fixed that first.
Sent from my GT-I9000M using Tapatalk
Dont think it need it.
First if hardware permit to record 1080p stream the 5megapixels chip wont manage to provide 1080p frames with a decent framerate.
then if it could the optics wont be able to resolve the resolution gain.compared with n8 nokia or iphone 4 720p output you can see what there s place for improvement in this way(sharpest optic and better sensibility)
but may our dev can work on compression level to keep more fine detail , sensibility management or faster autofocus without resolution change.
think this is the only reasonable improvement we could expect by software mod
Well, I have problems with 1080p playing, let alone recording.
Anyway, the hardware is 100% capable of 1080p recording and it would be really cool if some can mod it.
medimel said:
Dont think it need it.
First if hardware permit to record 1080p stream the 5megapixels chip wont manage to provide 1080p frames with a decent framerate.
then if it could the optics wont be able to resolve the resolution gain.compared with n8 nokia or iphone 4 720p output you can see what there s place for improvement in this way(sharpest optic and better sensibility)
but may our dev can work on compression level to keep more fine detail , sensibility management or faster autofocus without resolution change.
think this is the only reasonable improvement we could expect by software mod
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Hummingbird is capable of 1080p hardware decoding/encoding. It's equipped with hardware encoders/decoders. Both of them require decent amount of RAM reserved. I think that was the issue.
5mpix sensor is perfectly capable of delivering decent framerate @720p, why wouldn't it be capable of 1080p?
Resolution is enough, there might be bandwidth limiting factors between sensor-CPU.
Optics is perfectly capable of making quite sharp photos @5mpix, why wouldn't it be capable of shooting just 1920x1080?
There will be no software mod enabling 1080p recording, without hacking into hardware codecs/drivers.
Even if the framerate would go down to 15-20 fps, I would personally really like this feature. Some moments are best captured in highest resolution possible. An idea about the memory could be to allocate needed amount on demand, thereafter releasing it again?
Thanks for confirming that our Galaxy S is indeed hardware-wise capable of recording in 1920x1080.
Actually, why 1080p? It doesn't NEED to be 1080p. Why can't we add support for 800p (800lines vertical res) or even 960p.
We keep thinking about making the jump to 1080p, but is there any reason why would couldn't ramp up the resolution higher on the camera? Just because your TV expects 720p, doesn't mean computers do when playing it back...
andrewluecke said:
Actually, why 1080p? It doesn't NEED to be 1080p. Why can't we add support for 800p (800lines vertical res) or even 960p.
We keep thinking about making the jump to 1080p, but is there any reason why would couldn't ramp up the resolution higher on the camera? Just because your TV expects 720p, doesn't mean computers do when playing it back...
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800p and 960p are not common, so it would make things awkward. Can't play it on a 720p screen and not properly on a 720p screen.
BTW although noticable I don't think the difference between 1080p and 720p is that big. So I don't think anyone would really notice the difference between 720p and 960p and if so probably more as a placebo than a real difference.
Mycorrhiza said:
800p and 960p are not common, so it would make things awkward. Can't play it on a 720p screen and not properly on a 720p screen.
BTW although noticable I don't think the difference between 1080p and 720p is that big. So I don't think anyone would really notice the difference between 720p and 960p and if so probably more as a placebo than a real difference.
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I agree on the odd formats. However, going from 720p to 1080p is a significant improvement, especially if you have a large ( 46" + ) flat panal to view things on.
I would be very interested in this. And for everyone saying its not needed, this is a development forum. Many many many things that are done are "not needed" but still pretty cool. He asked if it could be done, lets stick to if it can, not if it should.
xan said:
5mpix sensor is perfectly capable of delivering decent framerate @720p, why wouldn't it be capable of 1080p?
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720 from 5 meg camera is already seriously pushing it, almost hack wise. Normally only 8 meg cameras should support it. And im not speaking about 1080...
The sensors usually can't deliver 30 fps at 1080p even if the hardware can encode it (which ive seen no tech specs of,just various "web claims" aka moot stuff)
It's not because its a 5MP sensor etc, its about how much data can go through the sensor after it's captured (that's before the CPU/DSP!!) You have very good 5MP 1080p cameras, because the sensors can handle it. They also cost more. I highly doubt the one in the SGS can handle much more than 720p at 30fps.
i'd rather have the image processing improved than 1080p, since 1080p (if it could be done that is) will be approx the same quality as 720p, use twice the space and need twice the power to decode on other systems.
in fact even the encoder can maybe be optimized. i'm not familiar with the hummingbird, but the OMAP's have TI's own such hardware codecs and while its proprietary you can implement your own codec accelerated by the DSP.
HummingBird's codec produce "very average" 720p H264 mainline (i believe?) at 10-12mbits (!)
Compare with x264 4mbit 720p H264 high profile quality for the same source, it blasts it away quality wise and is 2/2.5x smaller in file size. besides it has a zillion options depending if you want quality, latency etc.
bottom line, if a genius would accelerate x264 via the DSP it would be awesome.
I know the x264 team worked on the OMAP DSP with little success, mostly due to rather cryptic documentation
There are plenty of PC displays which AREN'T 1080P (only cheap ones). 1080p and 720p is optimal for TV's, but not computer displays. There are plenty of computer displays which are 1200 lines vertical resolution.
And I've found a difference between 720p and 1080p, but it's more obvious on larger displays which supports higher resolutions
I'd rather have slow-motion and a proper app that enables video editing/cutting/sound mixing just with Iphone 4.
Sent from my GT-I9000 using XDA App
I'm inclined to agree, theres room for improvement at 720p, its like the same logic as low end cameras and camera phones alike ramping up the pixel count doesn't directly mean better quality..
Plus the phone although it should be able to currently doesn't like playing back 1080p videos...
I'm not saying everyones going to want to watch 1080p on an 800 x 400 panel, just saying you might want to play back what you've just recorded to see how its come out..

[Q] Why cm10 camera cannot record at a constant 30fps?

Why cm10 camera cannot record continuously at 30fps?
be it 720p or 1080p.....frame-rate always drops in low light.
I want a camera which records at 30fps continuously irrespective of the lightning conditions...the same way we had on stock.
Why is fps issue there?It is similar to the one on HTC devices where fps drops in low light.
its normal behavior for lowlight conditions to have longer exposure shutter times during filming with small lenses in mobile phones
KillerbeeNL said:
its normal behavior for lowlight conditions to have longer exposure shutter times during filming with small lenses in mobile phones
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then why does it not happen on stock ROM?with LG stock cam flashable mod on CM7..continuous 30fps is available.then why not on CM10?
developers is it possible to make this happen?
black_mamba99 said:
then why does it not happen on stock ROM?with LG stock cam flashable mod on CM7..continuous 30fps is available.then why not on CM10?
developers is it possible to make this happen?
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i have used the moded stock cam by AndiCP on GB before to and it should be just a matter of time to have this for ICS roms
black_mamba99 said:
then why does it not happen on stock ROM?with LG stock cam flashable mod on CM7..continuous 30fps is available.then why not on CM10?
developers is it possible to make this happen?
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higher fps @ night = darker videos.
There is a simple explanation here. The lower light means there is more noise in the video. With more noise the encoding engine has to put far more effort to get the compression it needs. However with low light unless the encoder has a denoiser the encoding engine has far more noise to deal with than normal conditions.
If you want a more technical answer: More noise means that the motion-estimation engine of the encoder is thrown for a toss. This is the part that consumes maximum CPU cycles. Hence the drop in CPU cycles.
There is another aspect here: The more the noise, the worse the compression and hence even other parts of the encoder are basically crunching more. More bits are generated which means that the encoding and entropy engines are also crunching more and hence the worse performance.
Generally in high end cameras a lot of noise is removed by the imaging pipeline in the sensor. However don't expect that in a mobile phone sensor. [This is the ISO performance that you see in DSLRs ].
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http://stackoverflow.com/questions/12099845/low-lighting-leads-to-low-fps-when-recording-video
defcomg said:
higher fps @ night = darker videos.
http://stackoverflow.com/questions/12099845/low-lighting-leads-to-low-fps-when-recording-video
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I know that mates.
I don't care about dark videos or more grainy video
since in lowlight or "not the brightest conditions" anything below 30fps isn't pleasing to the eyes...especially fps of 15fps is a joke.
I'd rather have 30fps while sacrificing a bit of quality.
since the cm10 camera doesn't produce any super awesome video in low light by reducing fps

Video quality and screenshots

I must say I am very impressed with the video quality on the Note 4. The OIS gives video great stability. I have a couple of questions about resolutions/fps and lossless zoom.
1.I heard somewhere that in smooth motion (where it defaults to 1080p) the fps is double that of the note 3 in this mode, ie 120fps. Can anyone confirm this? This would be awesome as unless I'm mistaken we could take 2mp snap shots from the video and these would have an equivalent shutter speed of 1/120 - great for moving objects!
2. Does anyone know how far you can zoom in losslessly in the various resolutions. I've got a feeling it's 1.5x in 1080p but I'm not sure. Would also be interested to know if we can zoom in losslessly at higher resolutions and to what extent. Although shooting in 4k isn't that useful to me, the ability to screenshot 8mp images from any part of the video is a very cool feature.

960 FPS video recording?

According to this:
http://hispeedcams.com/lenovo-zuk-z2-pro-will-have-960fps-video-confirmed/
ZUK Z2 Pro should be capable of recording video at 960 FPS.
It is probably achieved through interpolation or something, or not at all (see Mediatek and their "[email protected] FPS").
Anyway, when you guys get hands on ZUK Z2 Pro, share your impressions and what the camera is really capable of.
andriman said:
According to this:
http://hispeedcams.com/lenovo-zuk-z2-pro-will-have-960fps-video-confirmed/
ZUK Z2 Pro should be capable of recording video at 960 FPS.
It is probably achieved through interpolation or something, or not at all (see Mediatek and their "[email protected] FPS").
Anyway, when you guys get hands on ZUK Z2 Pro, share your impressions and what the camera is really capable of.
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Yeah it is on official site, there is 960 fps but unfortunately resolution is not mentioned.
Something is written in chinese forum that 960fps is not supported yet because there is no ZUI 2.0 yet.
So we will have to wait a little for a review.
hello everybody, as a student very intersted i made a little calcul. The snapdragon 820 is able to encode 4k video at 30fps, ie 8.29 Mega pixel at 30fps. So the sd 820 encode 248 Mpixels per seconds. So at 960fps, it means that you get about an image of 0.25 Mpixel,which is roughly a 480*640 pic. Not bad. However if some Mediatek CPU encode at 1080p 480 fps, and if the sd820 is considered better, then he can encode more than 2.09*480 Mpixel per seconds, which match 720p at 960fps. hoping for some other resolution/fps solutions from ZUI 2.0. But if there is no breaktrough for the camera then 960fps is impossible to reach( this far this speed is only achieved by pro cameras which cost thousands), meaning it's a false rumor launch by zuk for marketing aims. Wait for the reviews is my last advice. tchao
SD 801 was capable of [email protected] FPS already (h264).
SD820 is capable of 28 MPx/s (4K is 8MPx) , so theoretically, it is capable of much more than just what you mentioned. [email protected] FPS is only HEVC bottleneck.
https://www.qualcomm.com/media/documents/files/snapdragon-820-processor-product-brief.pdf
MTK claimed their SoC is capable of [email protected] with the use of a Sony's sensor which didn't even have that capability in it's datasheet.
And honestly, it's been a long time since they announced that and have you seen it ever come true?
The only mobile camera sensor capable of very high FPS up to this moment was Toshiba's T4K82 with [email protected] FPS, [email protected] fps and [email protected]
http://www.androidauthority.com/toshiba-240fps-t4k82-sensor-596203/&ved=0ahUKEwjDx_zy4f3MAhUFORQKHXP1BisQFggcMAA&usg=AFQjCNHi7pL_vdS6wb7F9fnUwtST4ip4IA&sig2=nTEBpX31ZuZS2WzWgj5VAQ
But it never appeared in a phone (or any device really), guess it was not as good as they claimed it to be...
OmniVision's OV13870 is capable of up to [email protected] through cropping and binning. However I have a feeling that they are actually the only one to be honest and admit it is not REAL 1080p. Because every slow-motion recorded with a phone I saw was like of a lower resolution then the file captained to be of. (720p looked like 360p, etc)
In my opinion, 960 FPS video recording is not possible with the mobile camera sensors which are currently at the market... Besides, iPhone always seems to come first with better slow-motion (they introduced 240FPS with a Sony sensor and nobody was able to compete woth that for more than half a year). They haven't even introduced 480FPS yet and somebody claims to have achieved 960 fps? I consoder that highly unlikely.
That is why I am looking for what comes out of ZUK Z2... If it really is a 'scam', then I say that they (ZUK and Lenovo) need to be punished...
Even if they come up with something ugly like frame interpolation.
First samples regarding the slow-motion video recording:
http://www.gizchina.com/2016/06/08/weekend-zuk-z2-pro/
So now it is confirmed - it does not record at 960 FPS. It does not even record at 240 FPS.
It records at only 120 FPS ! 720p is the resolution.. but honestly, it does not even look like 720p... more like 576p.
And the player allows you to set the playback speed... so for 960 FPS they basically play one frame 8 times....
Pretty disappointing...

240 FPS 720p

Is there a way to enable recording of 240 FPS slow-mo? I really do not mind the video being at quality of 720p, If the phone is capable of 1080p @240, I do not see a reason why it would not handle higher framerate at 720p.
where did you find info that it could handle 240 fps? i thought it was more like 60 (or 120 for 720p max)? don't get me wrong, i would like to see that, but imo this is out of A2's reach.
ond96 said:
Is there a way to enable recording of 240 FPS slow-mo? I really do not mind the video being at quality of 720p, If the phone is capable of 1080p @240, I do not see a reason why it would not handle higher framerate at 720p.
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It records video in 1080p at 60fps or 720p at 120fps.
The 660 chipset on the Mi A2 IS capable of 240FPS @ 720P.
(https://www.qualcomm.com/products/snapdragon-660-mobile-platform)
The limiting factors here would be either A.) the camera modules or B.) software implementation.
So, in theory, yes but further testing/research would have to go into determining the possibility.
This would best be a question for Xiaomi support:
https://www.mi.com/global/support/contact/
Good luck!
and C) the willingness of Xiaomi of course
^^^ Absolutely this. LOL.
Even Mi 8 lite has 240FPS @720p, it uses the same CPU, so it is a software matter, so there should be a way to enable it.
@ond96
And you're likely right but, as of now, no one on XDA has volunteered to implement such a change.
Please contact Xiaomi and inquire further with them.

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