Messages

did you do this ?
https://www.magiclantern.fm/forum/index.php?topic=19336.msg218753#msg218753

Thanks, I had not seen this message, I will see if that works !

Hey !
I have been trying to get 4k anamorphic and 48p to work for a few days, but it keeps showing me weird flickering black and white liveview, which shows on the mlv file when opening it in mlv app, the weird thing is that I can see that its enabled (it shows 4064x590 when using 4k anamorphic, and 48p crop_rec seems to load correctly). So if you have any ideas, please help me ^^
Thanks a lot for your awesome work !!

I don't understand why I can't get the 48p mode to work. It worked once, and now it doesn, work anymore. Basically, when I turn on the 4k crop mode (before turning on the 48p mode), the screen is blinking, so maybe the problem comes from the 4k crop mode... Thats really weird, I will try to reinstall the build

2784x1160 definitely looks really cool, I made a short film using it, and I love it (its not perfect, I had sometimes bad exposure and out of focus clips but its okay, I am just starting)

https://www.youtube.com/watch?v=-5Fv7VY6rrU

E0.3, is too high already, try to keep it with at least 1.0 or something but you need to test this yourself and get a hang of it so you wont have to rely on histogram that much, in some scenarios(under tree for example) you have to choose if you want to keep bright areas not clipped or avoid noise in shadows, i go for second option because overexposing in raw does not look as bad for my taste but underexposing is a killer for some shots , you cant save them to look decent and have to do denoising which will steal the details.
Second clip is underexposed too.
Maybe youre like me and you like when its dark and moody but in raw you should not try to get that in camera , expose to get most dynamic range from the image and pick whats most important part of the image, sometimes some guy in far background with bright sunglasses will overexpose your histogram( it will say overexposed even if your close subject is underexposed in dark shadow) , hes not important, let him clip and preserve dynamic range of your important subject.
By writing "You should amost overexpose" i meant , i go for overexposed and if iso200 is overexposed then i go to iso 100 if its not overexposed and its about one stop till overexposed, if i expose for liveview to make it look nice on the screen then image is way too dark later in MLVApp, thats why i dont judge by looking at the liveview, mostly histogram and past experiences help me to judge what ISO should be used but its best to use ISO100 because this one has most dynamic range, higher ISO's will lose a bit from dynamic range.

Ok thanks for the information, I will try different exposures to see how it works.
By the way what do you turned on in your display settings ? Are vectorscope, or other diagrams necessary ? I don't know which ones I should use to help me expose correctly.

Here, no hard contrast edge is in focus... no chance for moiree.

ok, thanks. I definitely need to learn a lot but I am so excited about that. I will try again and again

So I have to expose looking at the histogram, just before it says OVER ? (so it says E0.3, or E0.4...)

the weirdest thing is that I had no issue before, check this : https://www.youtube.com/watch?v=BiQI63nJJ5g

You should ETTR (expose to the right) with raw , otherwise you will get what you got.You have histogram which could tell you how much you can bump exposure up.
Recording with RAW is different than recording with h264, what you see on the screen is not what you will get, in liveview you have picture style applied and much more contrast than actual RAW frame.You should almost overexpose with raw.
I filmed with 5d2 today and dont have what you got, use magic zoom or peaking to get sharp focus
Id say all problems with this picture is your mistakes and filming like regular h264.

Ok I will try that, it should fix that aliasing ?

Here it is sorry (20mb)
https://drive.google.com/file/d/14tazB5SekYdMNuBOmREfc3DqNrZDIW8a/view?usp=sharing

Here is a shortened MLV (I chose Fast Pass in export settings)

https://drive.google.com/file/d/1xKjikSsYZnvyqrkQI4BWmStF-5AVwOto/view?usp=sharing

[Adobe After Effects CS6]

Will , I see no aliasing in the clip I downloaded but it is at least 2-3 stops underexposed (try to use ETTR technique)
I always use Adobe After Effects CS6 to process my MLV files , so I hardly ever come across aliasing issues .
What I find that help with aliasing is to use "Edge Defringe" in A.E.




here is the XMP file from adobe after effects to adjust the dng's M30-2057_000000.xmp
and here's the exported h264 mp4 file 4096x1784_h264-A.E._M30-2057.mp4
Not sure why you are using 12bit , 10bit should be enough
FYI: I use Technicolor's CineStyle Profile for my Liveview  to judge my exposure with & I always get very clean shadows .
It's never fail me yet !

Well then my MLV app has a problem because the image is awful, completely unsharp and werd colors everywhere... I will try with the 1.6 version... and also in AE.
I will also send you another clip so you can tell me what you think.
btw, the clip is underexposed but i exposed for the highlights (maybe its not the right way to do things ^^)



Here is a png exported from MLV app without any correction (converted to jpeg because it was too big), its unusable...

The aliasing is sooo heavy... and I had no problem before with the same build... and its completely unsharp




Here is another clip after I reinstalled ML (June 20th build) : https://drive.google.com/file/d/1NWaXzlWmFDpgGzRqZnWe3Xr5sYC4ilQm/view?usp=sharing

https://youtu.be/p2jvRNGMUzc
Got those vertical lines in 4k, but did everything that @Reddeercity said for eliminate it before shooting. I think it's my camera issue.

I had those lines too, but I found out that turning off then back on raw video recording (after 4k crop rec is on)
2 times is not enough, I have to do it 3/4 times until its ok, and Don't forget te refresh liveview before you turn raw recording back on.

Moiree depends also on the lens used, the aperture used,... I also get 3x3 clips without moiree, and others with a lot.

Yea but are you sure this is moire ?? With so big green and pink pixels ?

Sure, this is 3x1 aliasing. Somewhere there is a thread in the forum, where some guys compared 3x1 with 1x3, where 1x3 is way better. In this thread there was also the explanation why. From my own tests I can tell you, 3x1 always produces the artifacts you show here - also on other cameras like the EOSM. That's why I don't use it.

Edit: just fount this, but there was a more academic explanation and research post somewhere:

But on other clips I did not get these problems and now its on all clips...

Here are some screenshots of 2 clips exported to ProRes 422HQ, I Don't know why I get this issue.. Its not really aliasing

I don't see the problem , quick export to h264 M27-1836.mov
Yes there will be some aliasing (Very little) , but not nearly as bad as 3x3 (FHD) and in some cases you will see no issue at all .
It comes down to how to you process (color grade) you file .

Just a FYI; I don't mind downloading a test .mlv file up to 1GB ( I'm on a commercial connection 300 download 15 up)
But you can shorten them in MLV App by selecting the number of frames and save as a .mlv .

Maybe the mlv app didn't launch correctly, I will try again.

Its normal because 590 is not much when width is 4064, so upscaling will get a lot of aliasing, if 590 is skipping its more aliasing, if binning, there still gonna be some but less.
Read this about 1x3 and 3x1  https://www.magiclantern.fm/forum/index.php?topic=16516.25
Also the file is about 400MB, i dont think many guys have time to download this and check, its better to post the frame.

sorry I will post the frame, and I will read what you sent me !
But its weird because I did not have these problems before

I don't know why but I get some heavy aliasing when shooting 4064x590...

https://drive.google.com/file/d/1xzii_J8viXX3q8RF9deiEayK97lrQY05/view?usp=sharing

I tried the new build, in 4064x590, and black level is far better than it was, I just need to make some tweaks with the green curve.

This is an awesome resolution, because we can shoot way longer than 2,7k, small crop factor, only downside is the preview, but for static subjects its ok.

What ? you say black level is off ,but you didn't try the new build ?
Then how do you know the black level is off ?
black level is ok here no problems

Yea sorry thats a bit stupid ^^
Did you have problems with black levels on previous builds ?

New test build , magiclantern-crop_rec-4k-3x1_2784x1160_1920centered_7.54pm-5D2-eXperimental.2019Jun20.5D2212.zip

Ok in 4k 3x1 Anamorphic , you now longer have to go to the advanced crop_rec menu to set the centered vertical , got that figured out now.
I notice when you enter in to that preset (4k 3x1), you will see some vertical lines at first , you need to refresh liveview !
best way , is to turn off "Raw Video" tab press the half shutter button , that will take you a frozen liveview , press trash button to enter ML menu
turn on "Raw Video" tab (should say 4064x590) and press half shutter to refresh and now you are good to go should have clean liveview now .

2784x1160 is the new 5x zoom preset .

I also add 1920x1200 1:1 centered in 3x3 , this one is still having some problems , one of the reg's didn't apply 

Code Select Expand

ADTG12 0x1000 0x6 ->0x5
need to do some more work on it .

Have to add several new lines of code to  crop_rec to get 3x1 4k to work , basically 3x1 preset structure was missing
took me a little while to wrap my head around what was missing . Once I debug the problem with "ADTG Reg's" not applying
all the rest of the preset will come very quickly , since all the rest of the preset rely on adtg12 reg's working .

Awesome !! I will try again 4064x590, to see if I still have some issues with vertical lines !

Edit : I just tried what you said (turn off raw, refresh, turn it back on), and I don't have vertical lines ! Black level is still off I think, even in 2784x1160, sadly. (I did not try the new build yet)

I'm very close to having 4k Anamorphic (10bit raw 4064x590->4064x1770) coded , still having a problem with "pack12" applying to cmos[1] , but there no problem with
the 3x crop preset 2784x1160 , I need to write some more yet , almost there 
Here a quick test , from my back yard yesterday , MLV App -> to 10bit dng's ->import in to CS6 Adobe A.E. , grade with ACR ->export ProRes4444->upload to YouTube
To see the 4k stream watch on chrome ,
FYI: ISO 100 1/50th , Canon EF24-70mm f2.8L , crop factor 1.38 shot at 24(33.12)mm & 70(96.6)mm @ f8  & ProMaster Variable ND for video set to ND3

Sorry for the double post of the Video  thought it should be here also .

amazing ! Did you notice any issue with black level ?

Yea I know the problem , it's because of 2 thing
1) The black bar on the right side is part of the problem
2) The override vertical fine adjustment (cmos[1]lo & hi  in crop_rec advanced menu is
fighting the with the code

Code Select Expand

PACK12 (9+1 , 42+1)
which is doing the small thing , this need to be changed ,
I haven't done that yet (as I just discovered how to code it correctly last night )
Soon , I may look at it tonight yet .

Ok, thanks a lot !  (I can wait, I have other builds to wait  )

@Galterius Have you switched off the Auto Lighting Optimizer in the Canon menu? Just a thought - you probably have it switched off, but worth checking. I had problems caused by that under certain lighting conditions back in the day.

I will try that !! Hope it will fix it !

Edit 1 : it is switched off...