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Anyone getting rolling bars when recording in slow motion low light?

I'm getting some seriously nasty bars during slow motion recording (I attached a screen shot which isn't as bad but when it's a video the bars move all around and are very distracting) Anyone seeing the same thing or am I looking at a defective phone? I already swapped out phones yesterday due to a stuck pixel, but best buy has been very easy about it thus far. Just wanting to see if this is hardware or software, thanks!

Yep, exactly the same here. Gets worse the more the sensor gain ramps up.

ydoucare said:
Yep, exactly the same here. Gets worse the more the sensor gain ramps up.
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Checked the sprint store demo and a best buy demo, All the same. Must be a low light issue. Oh well, Guess most of the time the feature will be used in the daylight (although this may be a bad thing when trying to slow mo some epic beer pong matches)

coojoe1000 said:
Checked the sprint store demo and a best buy demo, All the same. Must be a low light issue. Oh well, Guess most of the time the feature will be used in the daylight (although this may be a bad thing when trying to slow mo some epic beer pong matches)
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Figures, seems like it would be a hardware issue, but maybe there will be some magic firmware update that will help.

Most serious hd cameras require a lot of light, so this should be no surprise when recording show motion videos. Just be sure to have adequate lighting in the future
Sent from my HTCONE using Tapatalk 2

I haven't looked closely at the example yet otherwise I would have put my 2 cents in earlier.
I work a lot with cameras and know them very well. One thing to keep in mind is cmos sensors don't expose every pixel at the same time. This causes what is known as the jello effect when you move quickly left and right. This can also cause what is known as rolling shutter. I believe this is caused by the shutter speed in combination with the way cmos sensors work. When I get back from this weekend trip, I'll see what is going on.
At work I have a professional Sony video camera with a backlit cmos sensor. If I drop the shutter speed down too low to help when it's too dark, especially around fluorescent lights, I get brown bars rolling across the image. It's just a physical limitation of the sensor no matter the camera. Some hide it better than others. I hope this helps clear this up.
Sent from my Evo 3D CDMA using xda app-developers app

This is nothing like traditional noise caused by high sensor gain in low light. We're talking dense horizontal lines only in slow motion recording, which I'm guessing is 120fps? 60 fps mode works fine. I've seen examples of slow motion video recorded by the euro version in low light that didn't have this problem.

ydoucare said:
This is nothing like traditional noise caused by high sensor gain in low light. We're talking dense horizontal lines only in slow motion recording, which I'm guessing is 120fps? 60 fps mode works fine. I've seen examples of slow motion video recorded by the euro version in low light that didn't have this problem.
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That doesn't eliminate it as a cause. The example you saw could have been in better lighting conditions than you thought, or the euro edition might have had older firmware that didn't let the ISO go as high (thus, the whole image would appear much darker, but less noise).
120fps slow motion means the camera has to use at least 120th of a second for a shutter speed. This is relatively fast for a smartphone camera, so it has to bump up the ISO to compensate. If the light is especially low, it will have to move all the way to the upper bounds of its ISO capability to get a usable image. Meanwhile, a 60fps video will have MUCH more time (2x is a lot of time) to grab light, and so it doesn't need to force the ISO so high.
It's extremely unlikely that a firmware update will solve this issue. All they could do is just force the camera not to use that high ISO setting, resulting in slow motion videos that are too dark instead of too noisy.
(Also, BTW, this has nothing to do with the jello effect)

How do you do slow motion video recording? When I have the video camera on, there aren't any menu options available.

Vincent Law said:
(Also, BTW, this has nothing to do with the jello effect)
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Thanks for adding. I hadn't had a chance to even look at the example posted but felt like it should be addressed by someone. I'm out in the middle of nowhere right now, video streaming isn't always going to work well here.
Sent from my Evo 3D CDMA using xda app-developers app

Vincent Law said:
That doesn't eliminate it as a cause. The example you saw could have been in better lighting conditions than you thought, or the euro edition might have had older firmware that didn't let the ISO go as high (thus, the whole image would appear much darker, but less noise).
120fps slow motion means the camera has to use at least 120th of a second for a shutter speed. This is relatively fast for a smartphone camera, so it has to bump up the ISO to compensate. If the light is especially low, it will have to move all the way to the upper bounds of its ISO capability to get a usable image. Meanwhile, a 60fps video will have MUCH more time (2x is a lot of time) to grab light, and so it doesn't need to force the ISO so high.
It's extremely unlikely that a firmware update will solve this issue. All they could do is just force the camera not to use that high ISO setting, resulting in slow motion videos that are too dark instead of too noisy.
(Also, BTW, this has nothing to do with the jello effect)
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Click to collapse
The euro demo was in CONSIDERABLY worse lighting, without question. I don't have time to look for it now, but it's on Youtube.

The Euro version just got an official update regarding several problems. It also included a low light slomotion video upgrade
Sent from my PG86100 using xda app-developers app

I'm getting a stuck blue pixel when taking photos in low light... is anyone else experiencing this? The blue pixel is showing up in the actual photo taken, so I'm assuming it's a problem with the sensor.
Daylight photos aren't exhibiting this behavior.

the truth of 960 fps slow mo

So huawei stills refusing to tell us the truth of 960 fps.
Adobe after effect (twixtor) users will now what i am talking about.
The p20 pro is incapable of 960 fps video recording. It is just an frame interpolation technique. It may be recording only in 240 fps or 480 fps. Nevertheless, Software interpolation should be improved.
Those two videos show clearly the case
What do you think guys ?
Huawei should work more on that soft interpolation slow mo thing

you need to practice a little to get good results - https://photos.app.goo.gl/QnvGmwrUL5LmmAZe2

starbase64 said:
you need to practice a little to get good results - https://photos.app.goo.gl/QnvGmwrUL5LmmAZe2
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Practise what, im showcasing some examples from youtube to compare p20 pro and slow mo interpolation outputs.
Frame rate interpolation is what meant by camera powered by AI, i think

Great findings, the question is is this a bug, SW limitation or hw limitation. The drone part of the video definitely show that there is something weird going on. It would be great to have the same tests with 240fps to see if the result is as sharp as it should be...
Also it might depend of firmware version, it seems they made quite a lot of changes in a short time.

Huawei lie to us....

jbfuzier said:
Great findings, the question is is this a bug, SW limitation or hw limitation. The drone part of the video definitely show that there is something weird going on. It would be great to have the same tests with 240fps to see if the result is as sharp as it should be...
Also it might depend of firmware version, it seems they made quite a lot of changes in a short time.
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I have recorded some videos of muzzle blasts from ww2 era rifles,(yes there is a 6 foot flame out the barrel? not much fun on the shoulder though) in 960fps, it looks just like the you tube video, the 240fps looked alot better, I slowed them down as much as I could on the computer, the 960fps was no better than the 60 FPS, in fact I think the 60 FPS on my old windows 950 was better, with the p20 pro the 960 FPS vid played frame by frame was only 30 frames.
Trying to explain that the FPS is not right to so-called experts is a nightmare! I have explained it like this to a few at Huawei and EE, If you have a camera that shoots 900 FPS and you take a 1 second vid then when you play it back you should have 900 'photos' not 30, they still think it's recorded right as as it's slowed down, they cannot see the distortion or the lack of frames, or they choose to ignore you as they have been 'trained' on this phone.
According to meta data the 960 FPS bids are recorded at 30fps, if I connect the phone to the computer, go into the phones video file and right click on a vid for the properties, it says 30gps for the 960, the 250fps is recorded around the 240 mark (the speed is variable)

It is most likely a hardware limitation Huawei worked around with software trickery to get a similar effect. My guess is that Huawei's sensor lacks the on-sensor memory cache which is required for the sensor to be able to record high frame rate video without any of the normal limitations.
/ Magnus

Magnus3D said:
It is most likely a hardware limitation Huawei worked around with software trickery to get a similar effect. My guess is that Huawei's sensor lacks the on-sensor memory cache which is required for the sensor to be able to record high frame rate video without any of the normal limitations.
/ Magnus
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That's true

The 960 fps vídeos really look like twixtor vídeos.
But one thing do not make sense.
If it is a 60fps with some sw gimmick to make a 960fps why there is a recording time limit?
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Stupid from huawei

They put the same options as of the galaxy s9 to make you believe that it is real 960 fps

I still believe in some hw limitation as a rolling shutter insted of a global shutter that creates this effect similar to twixtor.
If it is only sw it would make more sense to record at 240fps without time cap and afterwards during editing let the user select the time frame to create the super slowmo.
Enviado de meu CLT-L29 usando o Tapatalk

Can anyone clarify that they get these anomalies and if so what fw are you on?
I'm assuming that some of this is software based so it's possible if that's the case that it can be improved.
Really really horrible to see this though, I did a video of some rain whilst on 110 and it was crap.
Small fast moving objects just come out wrong. Solid normal moving objects seem to be perfect.
EG: the wings on a bee from one of the first posts, you can see the blur effect

i also think it's some kind of rolling shutter issue maybe combined with a real 480fps... limiting the record time would otherwise make no sense st all...
i've made a video where it's provoked by a flickering led-illumination. If the illumination is bright it seems to get better.... cannot post the link, as i'm a newbie - some assembly needed by removing two spaces: https: //youtu .be/4bxmu6nhyho

short update on my comment: did some tests with bad/good illumination and now im pretty sure it's a rolling shutter issue (which isn't a surprise, that you need a lot of light for 960fps) videos wil follow soon...

960fps is fake (at least on the p20)
so i analyzed the video files i made with bad illumination and some movies with good illumination frame by frame and the answer is very simple: 960fps is completely fake. it's recorded at 240fps and then interpolated to 960 fps.
If the illumination is bad, it will just copy 4 times the same image which avoids the ugly artifacts. If the illumination is good it interpolates the frames in-between. it sometimes does a great job, sometimes a really bad one...
in the video here you can see the effect of the interpolation working/not working with the small droplet which stays in place for 4 consecutive frames:
https ://youtu. be/DK-A3j-mino
(again assembly required, sorry... remove the space after the "https" and before the "be")

flowgeek said:
so i analyzed the video files i made with bad illumination and some movies with good illumination frame by frame and the answer is very simple: 960fps is completely fake. it's recorded at 240fps and then interpolated to 960 fps.
If the illumination is bad, it will just copy 4 times the same image which avoids the ugly artifacts. If the illumination is good it interpolates the frames in-between. it sometimes does a great job, sometimes a really bad one...
in the video here you can see the effect of the interpolation working/not working with the small droplet which stays in place for 4 consecutive frames:
https ://youtu. be/DK-A3j-mino
(again assembly required, sorry... remove the space after the "https" and before the "be")
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That is exactly what it is. Huawei scammed us with fake specs

yeah... why is huawei not just honest?!? this way they sell a product intentionally with wrong specs! (with big advertisment on the webpage as well...) to me that's fraud, nothing else.

flowgeek said:
yeah... why is huawei not just honest?!? this way they sell a product intentionally with wrong specs! (with big advertisment on the webpage as well...) to me that's fraud, nothing else.
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Any sure procedure to report that with a solid proof

Xda staff would be posting articles about that if they were
honest

960fps Recording Artifacts

I'm on firmware 120, and I just noticed this in 960fps recording. Anyone else?
https://youtu.be/bYXvnw15Q6E
Sent from my CLT-L29 using Tapatalk

Yes, but it varies a lot, depending on lighting.
Looks like your video was shot inddors in low light? I get better results outdoors anyhow.

knowingplague said:
I'm on firmware 120, and I just noticed this in 960fps recording. Anyone else?
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Click to collapse
That's because there is a 99% chance, that the P20 Pro does not record at native 960 FPS. It might be 240/480 interpolated to 960 FPS, thus giving artifacts, like the Twixtor plugin for Adobe AE.

Ahh man. This is disappointing. Spent a lot to buy this. Yes, it is indoor, but i did turn on the flash.
Well it is what it is. For motion not that fast, results are brilliant. Those really fast moving objects, i think it cant cope because it's not true 960fps.
Sent from my CLT-L29 using Tapatalk

Is this FAKE, or is this a real night video from the p20 pro?

Hi Guys! Im looking for a phone that is the best in low light video (not photo!!!)
had an s9 on me a few days ago but the videos were way too dark in the situation i need it for.
now i found this video on youtube, can this be legit, or some gimmick used here?
Huawei P20 Pro - moving in low light : Bucharest at night 4K
the dark places (park, under trees etc) look way better than the s9.
but its hard to believe, i read in lot of reviews that the videos on the p20 pro are mediocre, not as great as the photo quality.
i suspect this was made with DSLR, not this phone....
any opinions? thx?

kbuss said:
Hi Guys! Im looking for a phone that is the best in low light video (not photo!!!)
had an s9 on me a few days ago but the videos were way too dark in the situation i need it for.
now i found this video on youtube, can this be legit, or some gimmick used here?
Huawei P20 Pro - moving in low light : Bucharest at night 4K
the dark places (park, under trees etc) look way better than the s9.
but its hard to believe, i read in lot of reviews that the videos on the p20 pro are mediocre, not as great as the photo quality.
i suspect this was made with DSLR, not this phone....
any opinions? thx?
Click to expand...
Click to collapse
It might be real...I own one and the video quality is way better since android 9...I will make a video tonight and upload it on youtube and post it here...and let you decide. The light in that video is not bad,because of the street lights,so not so hard to be at that quality. But I always make videos ad 1080 60 fps,it's better in my opinion and stabilization is active.
But I will do it at 4k in a few hours(they obviously put the phone on a stand or something,the video had no shake at all,I will do it by hand,so a little shake will be in my video,the stabilization is only active at most 1080 60 fps)

Please note that the p20 pro does not have image stabilization in 4k. They used a gimball. That is indeed p20 pro, I recognise the wavyness of the video when panning around. However... The video quality is not good. Samsung is better at that.

exodus394 said:
It might be real...I own one and the video quality is way better since android 9...I will make a video tonight and upload it on youtube
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hey thanks but if not a problem for you, plz make a video in the lowest possible framerate/resolution.
allow me to be more precise. im looking for the phone i can make a usable video in the lowest possible light.
i live in a problematic neighborhood, and if there is some argument that i record for evidence, i need video that is not just a black screen...
i dont need 4k for that, in fact even 480p would be enough if it has best low light sensitivity.
i try to attach 2 examples . THESE WERE MADE WITH S9!!! not p20 pro
1. part of my room with a 15W lava lamp. as you can see, apart from the lamp, everything else in unrecognizable (guitar on the wall, computer desk) you can barely see something is there.
2. garden+street with average suburban lighting. at the end of the video, there is good lighting, but if something is shadowed from the streetlight (tree, bushes) you basically see nothing, just pitch black. you woulnd even see if a person is there or not.
i converted to gif for better uploading but on the original videos the light level was the same, you cannot see nothing in the dark parts.
thats why it was hard to believe in the first post video, you can basically see everything, even in the shadows.

guys it wont properly play the above gifs, and many times just hangs. XDA site problem or its on my side...? thx

I do a ton of recording at EDM shows, rapidly changing lights, lazers, etc, and I've been beyond impressed by the video quality. The details this camera catches is nothing shy of amazing. I also don't bother with 4k, because in all honesty, I won't be viewing the videos on a TV large enough to take advantage of the resolution. So for me 1080P is more than adequate. Plus the steady shot/stabilization is definitely needed at my shows. My only complaint about videos on the P20 is the volume in loud environments. Ideally I should be using a usb-C microphone, but it's just easier without.

kbuss said:
hey thanks but if not a problem for you, plz make a video in the lowest possible framerate/resolution.
allow me to be more precise. im looking for the phone i can make a usable video in the lowest possible light.
i live in a problematic neighborhood, and if there is some argument that i record for evidence, i need video that is not just a black screen...
i dont need 4k for that, in fact even 480p would be enough if it has best low light sensitivity.
i try to attach 2 examples . THESE WERE MADE WITH S9!!! not p20 pro
1. part of my room with a 15W lava lamp. as you can see, apart from the lamp, everything else in unrecognizable (guitar on the wall, computer desk) you can barely see something is there.
2. garden+street with average suburban lighting. at the end of the video, there is good lighting, but if something is shadowed from the streetlight (tree, bushes) you basically see nothing, just pitch black. you woulnd even see if a person is there or not.
i converted to gif for better uploading but on the original videos the light level was the same, you cannot see nothing in the dark parts.
thats why it was hard to believe in the first post video, you can basically see everything, even in the shadows.
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Click to collapse
Ok,I will. I did not have time yesterday. I will make a video in my room,with light only from pc,and another with the monitor turned off,I have lots of leds so there is some light,but very low.

Here you go,I made a video in my room,the only light source being my pc: https://youtu.be/Hb5nxI_APNA

exodus394 said:
Here you go,I made a video in my room,the only light source being my pc: https://youtu.be/Hb5nxI_APNA
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hey, thx nice Union Jack :good: :highfive:

exodus394 said:
Here you go,I made a video in my room,the only light source being my pc: https://youtu.be/Hb5nxI_APNA
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just 1 more thing. if you turn off the monitor, but put the video in 720p/30 fps, does the camera "see" anything?

exodus394 said:
It might be real...I own one and the video quality is way better since android 9...I will make a video tonight and upload it on youtube and post it here...and let you decide. The light in that video is not bad,because of the street lights,so not so hard to be at that quality. But I always make videos ad 1080 60 fps,it's better in my opinion and stabilization is active.
But I will do it at 4k in a few hours(they obviously put the phone on a stand or something,the video had no shake at all,I will do it by hand,so a little shake will be in my video,the stabilization is only active at most 1080 60 fps)
Click to expand...
Click to collapse
There is no stabilization at 1080p 60 fps. You will only have it up to 30 fps.

kbuss said:
just 1 more thing. if you turn off the monitor, but put the video in 720p/30 fps, does the camera "see" anything?
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Click to collapse
Of course not,only the leds from pc,but in picture,night mode it can capture a lot more detail than I can see with my eyes.
And the video you saw captured very well,I did not see much more than the camera,it was very dark in the room.

exodus394 said:
Of course not,only the leds from pc,but in picture,night mode it can capture a lot more detail than I can see with my eyes.
And the video you saw captured very well,I did not see much more than the camera,it was very dark in the room.
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Click to collapse
thx, sorry, i was looking into other phones thats why it took long to get back...
i understand your reply, thats exactly my problem. im pretty much convinced that the original video is fake or cannot be made with a stock p20p camera app...
i live in a similar city like Bucharest where the video is made, eastern europe also.
in a business disctrict maybe, but in parks, normal streets etc we just dont have enough light for that
if you check the video you see that everything is visible even in the shadows, for example someone couldnt hide there cos the camera would see him.
thats just not realistic. i watched your footage, and is very similar to s9, although i had less light, but not complete darkness, sort of in between.
yes i know the night photo is great but i couldt find any evidence that it has better low light video then other phones... (apart from that one in the post)
i mean if its that good, how come we dont have a lot of amateur videos, or vlogger videos made at night with the p20p..?
just doesnt add up for me.
ps: i checked, my light was about 1/3 of your white PC screen.

kbuss said:
thx, sorry, i was looking into other phones thats why it took long to get back...
i understand your reply, thats exactly my problem. im pretty much convinced that the original video is fake or cannot be made with a stock p20p camera app...
i live in a similar city like Bucharest where the video is made, eastern europe also.
in a business disctrict maybe, but in parks, normal streets etc we just dont have enough light for that
if you check the video you see that everything is visible even in the shadows, for example someone couldnt hide there cos the camera would see him.
thats just not realistic. i watched your footage, and is very similar to s9, although i had less light, but not complete darkness, sort of in between.
yes i know the night photo is great but i couldt find any evidence that it has better low light video then other phones... (apart from that one in the post)
i mean if its that good, how come we dont have a lot of amateur videos, or vlogger videos made at night with the p20p..?
just doesnt add up for me.
ps: i checked, my light was about 1/3 of your white PC screen.
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Click to collapse
I did not compare it with other premium NEW phones,but it's good enough for me,if I ever want to make a video at night,most probably it will be inside a house,a pub,or even outside is good enough with street lights...if you need more,I don't know what to recommend to you,I did not research enough. But I do know it's better than cheaper phones for sure...and better than my old P9 and my Asus Zenfone 3(which were both premium when they were released).

Huawei P30 Pro slow motion.

Hello guys,
I'm wondering about buying this year flagship from Huawei, but i'm very concerned about quality of slow motion videos, it looks really weak comparing to Galaxy S10. Do you think that P30 Pro will get any update that will repair/improve recording videos in slow motion ? Please write your thoughts about that. Best Regards.

I'll just say it, slomo is sht. At 120fps is pretty decent. Anything higher and it looks muddy and doesn't focus. If you kinda care about video recording, maybe wait for the s10 5g. It'll be the one to beat for now.

Itaintrite said:
I'll just say it, slomo is sht. At 120fps is pretty decent. Anything higher and it looks muddy and doesn't focus. If you kinda care about video recording, maybe wait for the s10 5g. It'll be the one to beat for now.
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Click to collapse
You mean 120fps at P30 Pro looks decent?

jaco4a said:
You mean 120fps at P30 Pro looks decent?
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Click to collapse
Yes, it isn't that bad, and actually focuses correctly.

As above, the slow mo is pants compared to other cameras. It doesn't record at 960fps properly, it actually records at 240fps and then interpolates the missing frames.
It can be best witnessed with something rotating. For example I shot this example video of a fidget spinner: https://photos.app.goo.gl/ET1X4yPteuCpkJ8d7
As you can see when the slow mo kicks in, the surrounding areas of movement are a little blurry because the software is doing what it can. Admittedly, for an interpolated video it's quite impressive, but compared to a 'full-fat' 960fps video it just looks lack-lustre.

NJ72 said:
As above, the slow mo is pants compared to other cameras. It doesn't record at 960fps properly, it actually records at 240fps and then interpolates the missing frames.
It can be best witnessed with something rotating. For example I shot this example video of a fidget spinner:
As you can see when the slow mo kicks in, the surrounding areas of movement are a little blurry because the software is doing what it can. Admittedly, for an interpolated video it's quite impressive, but compared to a 'full-fat' 960fps video it just looks lack-lustre.
Click to expand...
Click to collapse
Hi man,
so can you maybe make an 240fps and 120fps samples for me? I would be very grateful :good:

NJ72 said:
As above, the slow mo is pants compared to other cameras. It doesn't record at 960fps properly, it actually records at 240fps and then interpolates the missing frames.
It can be best witnessed with something rotating. For example I shot this example video of a fidget spinner:
As you can see when the slow mo kicks in, the surrounding areas of movement are a little blurry because the software is doing what it can. Admittedly, for an interpolated video it's quite impressive, but compared to a 'full-fat' 960fps video it just looks lack-lustre.
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Click to collapse
Hi man,
maybe you could make an 240fps and 120fps samle videos for me? I would be very grateful :good:

Sure:
1080p120: https://photos.app.goo.gl/WYCVoLzPqdiPDjGy5
720p240: https://photos.app.goo.gl/WYCVoLzPqdiPDjGy5

NJ72 said:
Sure:
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Click to collapse
It's the same movie in both links

I got the same problem.
120FPS the video looks sharp, but if I choose 240 or 960fps the video is not sharp and I can't sharpen the video even if I touch the screen.
Maybe the next update will solve this problem.

This mine with Huawei P30 Pro and is no bad
https://youtu.be/FhmCMi8-Gu8
Gesendet von meinem VOG-L29 mit Tapatalk

salva111549 said:
This mine with Huawei P30 Pro and is no bad
https://youtu.be/FhmCMi8-Gu8
Gesendet von meinem VOG-L29 mit Tapatalk
Click to expand...
Click to collapse
It depends on what you're filming. If you find something close up (like a fidget spinner) the quality issues are visible.
Apologies on sending the same link twice, please find correct links below:
720p240: https://photos.app.goo.gl/aibketmvvKzDXc1w6
1080p120: https://photos.app.goo.gl/bbboiNvU78JhR4MSA
---------- Post added at 11:43 AM ---------- Previous post was at 11:40 AM ----------
As a comparison, this is a video I shot on the Xperia XZ Premium in 2017 - the first 960fps phone camera - and it's all so much smoother and crisp.
The Huawei technology (despite supposedly using the Sony sensor) isn't half as good IMO.
https://photos.app.goo.gl/NgRAWoPmvSwv2hto7
https://photos.app.goo.gl/RSfYtHkxKRWmh6y8A

Hi can anyone advise me how to get slow motion to record longer than 10 seconds thanks