Tagged with iso - Personal View Talks

Panasonic GH2 Custom Neat Video Profiles (noise reduction)

TreyM — Thu, 09 Apr 2020 07:47:38 +0000

Hi everyone, I spent a few hours over the past two days creating some Neat Video noise profiles for the GH2 running Moon T8. Currently, I have only created profiles for the 24H, 24L, and 720p60 SH settings, and I use Neat Video version 4. I'm not sure if these profiles will work on other versions, but they may.

If there is enough interest, I can begin to expand the profiles to support more video modes and various hacks beyond Moon T8.

I created a profile for each ISO setting, including secondary settings for the ISO bugged modes (up to 2500 ISO for those) ("clean" is normal, "dirty" is with the bug in case you forget to fix the problem and shoot with the ISO bug)

These profiles were created using the Smooth film mode at -2 -2 -2 -2, though they will probably still work with other modes. What is being picked up here is mostly sensor ISO noise since Moon T8's bitrate is so high.

The end result is that I have been able to recover about 1 - 1.5 stops of extra detail in the shadows on my shots as opposed to it looking like a total mess of noise. If you shoot at crazy high ISO settings, it can't make a shot at 12,800 ISO look like 200 ISO, but as long as your footage is reasonable, you can greatly expand the usable dynamic range of the camera and color grading is that much better.

These profiles should be used FIRST before doing any other processing such as grading, sharpening, scaling, or color correction. Etc...

The 1080p24 profiles seem to work fine on footage shot in variable mode, for example, if you use the 80% mode for slight slow motion.

Here is a link to an Imgur gallery showing what the profiles are capable of: Gallery

Download links:

1080p24 24H

1080p24 24L

1080p24 EX24H (Ex. Tele Convert Mode)

720p60 SH

Are modern sensors "ISO-less"?

EspenB — Tue, 07 Feb 2023 14:07:18 +0000

Are modern sensors usually "ISO-less" in meaning that gain adjustments are done in the digital domain after ADC?

I was under the impression that there was some sort of analogue gain applied before the ADC, but that's perhaps only true back in the 1990's...

How to view ISO Metadata in GH2 AVCHD footage!?

Alexauwa — Wed, 04 Jan 2012 06:14:30 +0000

Hi everyone,

I was taking a few test shoots at night. I was wondering if I can afterwards view the ISO value I recorded each file at.

Do you have any ideas? Does Adobe offer such a feature?

Looking forward to you replies.

Best,
Alex

Excessive Grain (Not ISO Bug)

jondshank — Mon, 05 Oct 2015 21:49:52 +0000

I recently loaded the Moon T7 hack onto my GH2.

In my most recent shoot I was using a 95mb/s Extreme Sandisk and 24H mode.

I played the video on my computer when I got home to find it looks grainy. I used 400 ISO throughout the entire shoot and according to my meter I was properly exposed.

Attached is a photo. I've seen shots from other people's moon t7 footage that are far more crisp. Any ideas?

A Few Questions About: Hacked Bitrates, Auto ISO, EV, Modes

Heatshiver — Wed, 29 Jan 2014 22:14:07 +0000

I bought a GH2 mostly for the hacked patches. I have spent hours researching to try to learn what to do and how to use the camera for video purposes. I am hoping that someone can help answer a few questions as most of my information tends to originate from this site:

Setup - In order to achieve the higher bitrates I had to use M from the dial atop the GH2. The camera icon with the M would not allow this. The tradeoff was Auto ISO with M, and adjustable ISO with the camera icon with the M. I use mostly Canon FD lenses.

1a) Bitrates - I have tried a few hacks with varying success. The best I have got is about 100MB with Flow Motion v2.02, however, most of the shots I got with this hack seem to be from 70MB-90MB. I tried Flow Motion, Driftwood's Moon T7, and two Driftwood hacks (176MB & 220MB) from a pack made by the user Sohus on this forum.

Is it common to be well below the stated bitrate amounts?

1b) AVCHD vs MJPEG - I never seemed to get very high bitrates when using 1080i, despite the hacks stating to be much higher. They would range from 15MB-40MB. To achieve higher bitrates with Flow Motion, I used MJPEG which boosted them much higher.

Shouldn't I be achieving high bitrates with AVCHD?

2) Auto ISO - Whenever I use M (from PASM) the ISO would always be set to Auto ISO. I could adjust the ISO when using the camera icon mode (with the M), but then the bitrates would suffer. I tried changing the ISO before shooting, but Auto ISO would kick in no matter what.

How do I change the ISO while in M mode?

3) EV - I know that EV depends upon shutter, aperture, and ISO, but I can see the EV when I push the Display button so I was hoping there was still a way to change it.

Am I correct to assume that because I am using Canon FD lenses I cannot use EV? Even if using a Panasonic lens, how do I change the EV (I tried, but failed).

4) Modes - I have only been able to use the hacked bitrates - and only to a certain degree - by using M with MJPEG.

What modes should I be using to use the hacked patches? The camera icon with M? High Bitrate? 24P? 1080i?

Sorry for all the questions. I am not unhappy with the camera, but I really want to know why the bitrates are not working? And moreso, why the Auto ISO can't be changed (as I don't like the amount of noise it can introduce)? Thank you!

Lumix GH4 Big Noise Problem

tomasawyer — Sun, 15 Mar 2015 19:10:52 +0000

Hi guys, I got my GH4 a month ago, and upon doing some video tests I am experiencing huge amount of noise in blacks and shadows. Even in bright daylight when i do some tests and i have something black in the video (dress, camera bag) even on ISO 400 it starts to get really big, ISO 800 almost unusable.

Anyone experiencing the same problem? Might be a faulty sensor from Panasonic? I am primarily shooting on Cine-D profile, no additional adjustments, but the problem is on Standard profile as well.

My iDynamic and iResolution is OFF.

I am really frustrated, I was expecting a better video that this noisy ants from GH4, anyone please help?

Apologies in advance for this GH2 ISO question

matt_gh2 — Tue, 18 Feb 2014 21:25:43 +0000

Sorry guys for this ISO question - have a shoot tomorrow with a GH2 and forgot the rule about what ISO setting you should be on when you turn your camera off, in order to avoid the ISO bug when you turn camera on next. Anybody remember correct ISO to leave camera at when you turn it off? (Searched ISO bug topic but couldn't find).

Thanks and apologies for bringing up this old ISO demon topic!

Dual Iso H264 software for HDR video

apefos — Thu, 12 Dec 2013 17:12:17 +0000

Panasonic Doubles Color Sensitivity in Sensors

adamzmith — Wed, 06 Feb 2013 09:38:10 +0000

Panasonic says its technology increases camera sensitivity by one whole stop. This means its cameras will theoretically produce the same level of noise at ISO 1600 as Bayer sensor-equipped cameras do at ISO 800

http://panasonic.co.jp/corp/news/official.data/data.dir/2013/02/en130204-6/en130204-6.html

Sounds very promising...

Iris Tweak vs ISO Tweak

PCortacans — Thu, 28 Mar 2013 05:54:25 +0000

(Vitaliy, I have no idea where to post this; sorry if this is not the right place)

I was reading the other day about de-clicking old Nikon lenses, and people's comments about how they'd like to slightly tweak the iris "on the fly" to adjust for minor light changes. Since I have a photographer background, the first thing that came to my mind is "Why would you want to do that? Doing so will change the depth of field!". Ok. Tweaking can be interpreted as "less than a click", that is, less than 1 stop (or 1/2 in some brands). But still, my question to you guys is "Why?" Is it because it is the only basic parameter (Aperture/SSpeed/ISO) that you can change on the fly, and not via camera menus? (You wouldn't want to change the SSpeed anyway.... And for the sake of this discussion, let's pretend we are on the less noisy side of the ISO values). What are the benefits of changing Iris? If you could decide to change Iris vs ISO (which takes me back to "Panasonic: Auto-ISO in Manual Movie Mode, por favor...!!!"), which one would you choose?

GH2 ISO noise bug at 320, 640, and 1250

balazer — Tue, 25 Oct 2011 22:00:03 +0000

The GH2 ISO bug for 320 has been documented already: if you switch from ISO 250 to ISO 320, there's more noise than if you switch from ISO 400 to ISO 320. I have mapped the bug for ISO 640 and ISO 1250 as well. It seems that the bug is exhibited regardless of whether you record or not.

Switching to ISO 320: low noise from 400, 500, or sometimes 640; high noise from all others and from power off
Switching to ISO 640: low noise from 800, 1000, or 1250; high noise from all others and from power off
Switching to ISO 1250: low noise from 1600 or 2000; high noise from all others and from power off

I couldn't detect the bug when switching to any of the other ISO settings - if it's there, it's subtle. But for 320, 640, and 1250, it was unmistakable. Aside from the bug, I would say that none of the ISO levels seemed particularly more or less noisy than would be expected. I'd say to use whatever ISO level you need, being careful to avoid the bug.

Note that it is not sufficient to simply switch from any higher ISO to avoid the bug.

A good practice for ISO 320, 640, and 1250 would be to switch to the ISO setting 1/3 stop higher, and then back down. (i.e., 400 to 320, or 800 to 640, or 1600 to 1250).

GH3 lines or banding at high ISOs (3200 6400) in video mode

djhessler — Thu, 10 Jan 2013 12:04:49 +0000

I'm curious if anyone is getting lines or banding in high ISO's with the GH3 in video mode, I get horrible lines/banding that honestly make my gh2 more pleasing to the eye. I have attached a file with file of 6400 ISO to make my point, of course I would probably never use 6400 but even at 3200 the lines are noticeable, any one else have this issue?

UPDATE: lol I always end up finding answers to my problems, well as it turns out, I was testing the high iso feature with a 14-42 X lens and that was causing those lines, I slapped a manual lens with no IS and no electronics and now I see how clean my 3200 setting is, so people watch out with those Panny lenses :-)

Noise Test: Panasonic GH2 with Driftwood's 176mb GOP1

Gabel — Thu, 06 Oct 2011 13:10:38 +0000

With the hack we all know how noise has become more apparent (because of the sharpness). I figured that it was time to test out and see the levels at different ISO values. So here are my results (since I'm not a Vimeo-pro member, there is some bad compression, but have the originals available for upload).

I shot 10 seconds (which now might have been too long) at each ISO value, with the body cap on. Settings were:
- Driftwood's "GOPStoppa" GOP1 176mb hack.
- White balance at 5600K
- Shutter at 50

I've upped the mids in After Effects quite a bit.

The major surprise was 320, which looks awful... Shot a second one, but had the same results! Very surprising...

Here's the video:

And the link to the original clips:
http://www.megaupload.com/?d=5M4N08F1

GH2 ETC-mode noise penalty

balazer — Thu, 03 Nov 2011 21:06:56 +0000

I have a 50-mm lens, which gives almost the same field of view as the Lumix 20-mm lens with ETC turned on, so I did a little experiment to see how much noise ETC adds. This was just eyeballing it, i.e., not scientifically rigorous. Tests were performed with 100-Mbps intra recording and NR at -2.

The ETC noise penalty is: 2 and 2/3 stops. Specifically, the picture with ETC off at 3200 ISO looks about as noisy as the picture with ETC on at 500 ISO.

What I find interesting about this result is that increasing the sensitivity by a factor of 6.4 increases noise about as much as using 6.76 times as much sensor area (2.6^2) reduces noise. In other words, the GH2 is making very good use of those 16 million pixels when it downsamples to 1080p, giving nearly all the reduction in noise that you would hope to have from using a larger sensor area and correspondingly larger lens aperture.

Though there definitely is aliasing in the downsampled picture. The aliasing is not as bad as in the GH1's 1080p, or in the Canon 5dmkii, but it's there, and it makes you see things that you shouldn't be seeing. I can put together a little demonstration video if anyone is interested, but that's a separate topic.

GH2 Hacking for Lower ISO?

saltherring — Tue, 17 Apr 2012 20:40:23 +0000

I did a quick search on this and couldn't find anything but I apologize if this has been discussed before.

I'm curious if anyone has hacked the GH2 firmware to develop lower ISO settings than 160. Is that even possible with the camera? I'd love to be able to shoot at 100 or even 80 or 50.

Black line streaks across B&W ISO 12800 footage

SightfulProd — Fri, 23 Nov 2012 00:06:10 +0000

I've been working on a project where I'm using the GH2's ISO 12800 setting for its grainy film look. I'm purposely underexposing my footage to give it a more grittier look and what I've noticed when using 1/40, 1/50 or 1/60 shutter speeds, I get a black line that goes across my video.

Watch the video in 1080p to see what I mean, anyone else get this? I'm wondering if it's a sensor problem, I'm using Sedna AQ1 patch.

Anyone ever considered a Sony NEX-5N Hack?!

Jonesy91 — Tue, 10 Jan 2012 09:01:56 +0000

I'm a long time GH1/GH2 hacked user. I viewed the Christmas Shootout videos from Phillip Bloom, and I realized that the DSLR with the most cinematic potential aside from the GH2 is the NEX 5N. If someone could hack the NEX 5N to a higher bitrate, it could probably gain all the advantages of the GH2, while keeping or improving what it already does better. A list for perspective:

GH2 (Hacked): -Better Resolution -Higher ISO values -More native lenses -External Mic Jack -Swivel out LCD

NEX5N: -Better Low light Capability -Sensor has better crop factor -60p!( better Full HD slow motion potential) -Flatter Pictures Profiles

...and I sure I'm missing something for both, but it would be helpful if anyone could add anything else they know. I don't know which one has better AF/AF tracking for its lenses. Just thought that the Sony NEX 5N may, if hacked, have everything we have in the GH2, and more (of course with no mic jack). SOMEONE PLEASE HACK THE SONY NEX 5N, PLEASE!!!!

25mm F/0.95 Voigtlander - Shooting in the dark

Alexauwa — Mon, 19 Mar 2012 15:08:24 +0000

Hi everyone,

I am shooting on the Voigtlander 25 mm f0.95. I've tried several shots, insight and outsight. I've noticed that in some parts the dark areas were absolutely clear, no noise at all, but in some where were. I've keep ISO between 320 - 640, f0.95.

How do I get, even if there is less light, the most best possible result - here a clean picture? Do I have to raise ISO in order ta achieve better results? (Sensor need more light sensitvity to bring out details, can you shoot on too low ISO?) I always thought: lower IS0 value= better picture quality.

How do you handle night shoots, any tricks? Any help would be much appreciated!

Thanks, Alex

Extended iso, bands across frame?

Ira — Tue, 27 Mar 2012 23:18:33 +0000

Total beginner here... I just hacked my GH2 and when using the extended iso there are dark stripes running horizontally across the frame, especially noticeable at 12800. Anyone else have this problem?

Nikon D4 Video - Available Light, Internal Recording Codec

Aria — Mon, 19 Mar 2012 18:01:12 +0000

Here is a video that someone made using a Nikon D4 under available light. I don't see any mention of HDMI recording so it seems to be all internal codec. I actually like the look of it. It's a different look than the typical Canon look many are used to, but it still looks good to me for an internal codec.

ISO bug? and how to proceed with my GH2 update

chouonrow — Tue, 14 Feb 2012 13:28:26 +0000

HI guys! I have read (I dont know where) that my hacked firmware can have some problems to ISO, causing that the gh2 is always with "auto ISO" and i think I have this problem because you can select any of the ISO but when you press record it show "auto ISO" i think that sometimes it is really in AUTO, but i dont think if this is only on my mind :S , I make reference to 24p recording in Manual movie mode.

Anyway if you think this "problem" is only inside my mind =)... I was wondering about updating to last official version of GH2 firmware because of the 25p, which is a must for me since the region I live in, but I need those marvellous 44Mbits and so on of the hacked version... so what do you think? Must I update to official firmware? Are available the last hacked firmware that run with last Panasonic firmware? or Must I forget the official firmware?

Thanks in advance

GH2 - ISO's to use and avoid

onionbrain — Sat, 14 Jan 2012 21:23:30 +0000

I was looking for a list of "native" ISO's for the GH2 and found a year old discussion on DVX user in which some guy ran tests and reached conclusions, then another guy ran tests and reached different conclusions, then the first guy ran more tests and agreed on some points with the second guy's conclusions, then the discussion veered off the road and started talking about the GH13 and something else, etc.

I'm looking for a list of ISO's to use and/or avoid from someone qualified and experienced. Can any of the GH2 pros in this forum help, or point me to a place with credible conclusions?

My thanks and best regards to all of you!

A question regarding ISO during recording

Hakosuka — Fri, 06 Jan 2012 09:37:48 +0000

I'm aware that during the recording you cannot change the ISO value, you have to set it before pressing the record button. However what I don't understand is whether this is due to the ISO limit removal within the hack or if this is just how the camera was designed? If I removed the ISO limit removal from the hack would I be able to change the ISO during recording? Or is it completely not an option regardless of whether I have a hack on the camera or not?

Sorry if this has been asked before, I've searched the web and I see so many different answers which confuse me lol

Josh

ISO limit removement patch problem on GH1 (Ptools 3.63d 071111)

Asiertxu — Thu, 01 Dec 2011 15:21:12 +0000

Hello people!

This is my first post here but I´ve been playing alot with ALL versions of Ptools since it got available!
So THANKS ALOT VK!

The other day I got the chance to play with the new version of Ptools and tick the "ISO Limit Removement" check box.
The patch is not working well and saw some strange things...
All looked right as ever in the ISO area in ( Creative Movie mode). You can select the ISO you want but when you
you press the recording button, the camera inmediatelly passes to AUTO ISO mode, so the ISO value you selected is not working anymore.
I perceived some strange behaivour as well. When I changed shutter speed to high values as 100/s and above to 4000/s
all looking right but just pressing recording button the picture brightness starts to oscilate constantly...

Hope this helps to the hack improvement!
THANKS again for your efforts guys!!

Cheers,
Asier.

Turn Auto ISO off?

flowolf — Thu, 01 Dec 2011 05:04:29 +0000

Can't find an answer to this question although it must have been given many times: upon pressing the record button the camera goes into Auto ISO. I have it set to M (manual) exposure. Using the 44M patch. Someone wrote that with the hack it says Auto ISO but actually stays at the selected ISO. (that's a tough one to accept) I selected ISO 500 and am getting a lot of grain...
Is this the patch, is my camera really going into Auto ISO? How can I control Aperture, Shutterspeed ánd ISO all at once?

ISO switches to Auto when recording in Movie Mode

stevgol — Thu, 24 Nov 2011 18:18:37 +0000

I just hacked my GH1 for the first time and selected the option to allow higher ISO's in Movie Mode but when I start recording the ISO indicator on the LCD display changes to Auto from 800. This happens even when I record in M or S mode. furthermore when recording in Movie Mode the exposure becomes under exposed even though I had it set properly before hitting the record button. The exposure stays locked in the other modes. Is there known problems with the ISO option for Movie Mode and could this be the cause?
Steve

ISO switches ot Auto when recordiing

stevgol — Thu, 24 Nov 2011 18:04:52 +0000

Can AutoISO max value be >3200?

aljimenez — Sun, 20 Nov 2011 14:17:25 +0000

The max ISO in AutoISO is 3200, and was wondering if VK, now that the ISO has been released for video, can do this for AutoISO? Probably not since this is probably a table in the AutoISO that cant be made larger? Al

ASA Rating of GH2 Sensor for Use with Incident Light Meter?

qwerty123 — Tue, 06 Sep 2011 13:38:24 +0000

I want to know what to set as the ASA / ISO Rating on my handheld incident light meter for use with the GH2. Ilya Friedman over at Hot Rod Cameras did a test with a DP on the gh1, and determined that:

"Even though the camera rating says 100 ISO, you get the best “to eye” image of of what you’re shooting if you actually rate you light meter at 640 (which I think it close to the native ASA of the camea. To repeate- set camera at ISO 100, and the base exposure of your meter to 640. ...Same thing works with a higher ISO, 400. Instead of placing the GH1 at 100, you’ll set it to 400 and your meter at 2500."
Source: http://www.hotrodcameras.com/tips-and-tricks/gh1-film-look-new-tips

I'm having trouble finding info about the gh2 in this regard. Anyone know of any sources or, better yet, how to do a test to determine this?

GH2 high ISO shutter speed related FPN

veloci — Sun, 07 Aug 2011 06:58:21 +0000

Hi, I am newbie to a lot of this FPN thing(y). I find that FPN do exist on my GH2, but it is very shutter speed specific. eg, I get them from shutter speed of 40 and up on high ISO settings with varying degree of severity, but 30 and under is fine even at very high ISOs like 12800. I am wondering whether that is common phenomenon, or I am just having bad luck. Oh, yea, I am talking about the video, not the photo aspect of GH2.