Messages

is it possible on 50d to do pixel binning instead of line skipping so that there will be less aliasing/moire?
i mean it has full resolution of 4752 × 3168 combining 3x3 pixels we will have 1584 x 1056 resolution.

Fantastic idea as it is, you really think that it hasn't been suggested dozens of times and hasn't been considered by the developers hundreds of times? )) or you really think you could be the ONE? ))

....And no, it's not trying to squeeze wide dynamic range it into a 8-bit (unless that is what you are rendering your files to). I recommend using a DNxHD 4.4.4. 10bit which is 20 times better than what any camera can provide internally.

Obviously, working straight with DNG's will be better, and there is no denying that. But like I've said in the beginning, this is especially for people who want to save space on hard drives and speed up their workflow.

I see your point and I stand corrected in a way )) Please let me know if this DNxHD codec is available free or paid? Thanks

I know it is a bit off-topic, but since I'm a 50D Raw Video Shooter, here it comes:

I usually my RAW2DNG DNG's as a sequence to AE CC and grade them in ACR at the time of import. Sometimes, the light changes during the my shot, in the same video clip. So the beginning is ok, but in the rest I would have to push its exposure (for example) up a bit.

My question is: after imported into AE, is it possible to return to ACR controls to grade a specific part of my clip? As many times as I need? Or I can only grade it on the import, and then all I have to work with is the Color Controls of AE itself? Does Resolve allow me to do it? What is the best time to color grading my clips, using ACR?

Also, if I color correct the video color inside AE, do I lose data or is it the same as grading DNGs in ACR?

Sorry for the noob questions, but I didn't know where to put these questions...

1. I would suggest importing two copies/clones of the same clip with different expo corrections. And then use two different parts from these clones.

2. You don't lose your data of course. The .DNGs stay intact.

Essentially, you are throwing away data anytime you render to a file format that is not RAW. Log is just a really cool way to preserve your dynamic range and most of your color information into a nice, manageable package.

Here is a quick comparison I did just now.
...

So, it's optimizing by taking the information that is already present in the raw, and boosting shadows and darks while lowering highlights, essentially centering the histogram like we are all already used to when shooting with DSLR's - but allowing you to render that raw information in a better format than the highly compressed and artifact-y H.264.

If you are limited on space and performance, a ProRes or DNxHD with the Flatz Preset might be more productive for you, and still give you excellent results.

...

Download here: http://www.dlwatson.net/flatz-preset.html

It's the roughly same thing as those flat picture styles for Canon. Trying to squeeze wide DR into 8-bit video by reversed-S curve.
Appreciate your efforts, but this is basically one of the reasons why ML RAW exists -- to avoid using those ugly picture styles 

...

I assume this has been discussed before, but is there a way to skip every 2 - reducing the moire and having the max res be approx 2250x1250, which could itself be cropped to something more manageable. I'm guessing the answer is that the video feed is being determined by parts of the firmware there is currently no access to - but it would be great if this were possible as it could kill 2 birds with 1 stone

Thanks

Dan

Don't dream about it )

Andy, could you please explain the difference between Magic & Tragic?
Thanks alot!

Andy has explained the difference 3 or 4 times by now. Why don't you look up his earlier posts?

[[offtopic mode on]]

[offtopic mode on]
I can hear about this progress with 7D RAW... Damn I sold my beloved 7D because it was the least ML'd camera at the time. Then I bought 550D as the the then most ML'd camera. Then I bought 50D as the cheapest "RAW monster".... Now everything comes back to 7D  ML ROCKS
[offtopic mode off]

[But I have good news.]

But I have good news. transcend compact flash 32gb 600x ....

Transcend 600x 32gb is well known as a stable card for 50D full frame. More than that, in crop mode it runs continuously at 1600x900. You can easily search in this thread to find out other "news" about this card 

Also, Komputerbay is absent in a number of countries. But some delivery services can help. Russia must have them, I suppose.

Hey Rommex, are you using Raw2CDNG on a PC? It doesn't seem to be working for me, ver.1.2.1. I joined a split file and now have 4.95GB file I load into RAW2CDNG, but I get an error "RAW2CDNG has stopped working" every time. RAW2CDNG also is showing under Resolution: 4385 and FPS: 555512.80. Basically weird numbers.

Do you or anyone else know of any other conversion methods on a PC that can handle files over 4GB?

*Also, how do you enable RAW recording on the above build you linked me to? Thanks

Hello there,

Yes I use Raw2CDNG, I have version 1.1.6 on my PC. It does not join the split files, as someone here suggested some time ago -- I assume it's a newer version that does. So first I join them manually by a File Splitter & Joiner, and then submit it to Raw2CDNG. Today I did that 3 times. One resulted sequence was failed -- full of pink rubbish. I just repeated the joining and converting -- it worked fine this time.

RAW mode: you turn on the RAW_REC module, then you enable RAW record in the menu. It's all done while LiveView is ON. I hope there are some detailed instructions at the top of this thread, the bloody manual that should be read, so to speak 

[goldenchild]

1. Recently I was testing ACR as I read several posts here on the forum about it being better. However, ACR doesn't solve the issue for me as I wished it would.

goldenchild, I take my words back and now have full agreement with your point. I tested ACR against DV Resolve specifically in terms of moire and aliasing -- ACR ROCKS!

UPDATE: a very noobish question: when importing the cDNG sequence to After Effects, is there a waу to see another than the first frame, and make adjustments against it? thnx

[at the length of the inter-pixel distance]

...
If you wanna get better footage from your 50D trust me go (ACR). 
..... (UV Filter) yes you heard me right UV filtration that's what's causing it.  ........

1. Recently I was testing ACR as I read several posts here on the forum about it being better. However, ACR doesn't solve the issue for me as I wished it would.

2. Maybe you mean that a good UV filter can eliminate Chromatic Aberrations, which it could for sure. But Digital (Bayer) color fringing happens when the ray of light has gone past the filter, the glass and hits Bayer pixels. You can't help it but blur at the length of the inter-pixel distance. That's why low-pass filters exists right in front of the sensor.

Hey 50D RAW community!

I was the guy who brought up those ugly aliasing+moire pictures some time ago )) and even was referred to as a "moire gang" man )) so I continue to explore into the issue.

Let me tell you I love my ML'ed 50D. But the issue of aliasing (whenever I some fine details / textures fall into the frame) still bothers me. And I try to find ways of workaround.

According to the theory, the problem happens when the fineness of the details in your frame comes close to the distance between the most near pixels. In the case of 50D, it's 0.0140783 mm. Rough (and over-simplified) solution is to blur the image in those small details while keeping larger details intact.

What do I do?

First, I use the aperture values out of the sweet mid spot of a lens. Basically it's either wide open or completely shut.
Secondly, I use some old manual lens (a guy in Ukraine does Canon EF mounts for old Olympus and Minolta lenses) and they lose some sharpness.
Thirdly, I use a stills photography Cokin add-on and insert a cheap Chinese ND2 filter in front of my lenses to lose some sharpness.

There is yet another method -- to de-focus your lens from the area with problematic details.
And I'd like to suggest one tool to make this de-focusing slightly more scientific.

It's a free application for Android that I wrote last winter. It does 2 things:
- calculates DOF (nothing special)
- calculates the degree of blurriness out of DOF

It gives a specific parameter that is called "Min Detail" that shows how much any object is blurred that is out of DOF (that is, de-focused). So whenever you have fine details / fabrics make sure that you take exact focus from that and that Min Detail parameter for that distance is not less than the real size of a detail / pattern unit.

Will not go into detail here more, as I'm not sure if a lot of people will find this usefull...

The app is here: https://play.google.com/store/apps/details?id=net.kadru.dev.visualdof2
The help info is here http://dev.kadru.net

...
I wouldn't advise anyone to use the 28 May build...

For some reason I stuck to it for a month a so -- it worked just reliably and with no glitches, as opposed t some newer ones in June.
But the current builds are super, for sure.

[File Splitter & Joiner]

Hey guys......
*I lost some footage because I went over the 4GB mark and got those pink files and .R00 files.
*I'm still unclear if RAW2DNG (PC version) works on files over 3.99GB. It wouldn't transcode to .DNG files for me. So for now, I'm just making sure my clips don't hit 4GB.
*I read something about stitching files together, but I'm not sure if that's related to the above problem or not.

Nice video.

Try using Raw2CDNG. It does work with files longer than 4GB.

You first rename split files (so that they have extensions .001, .002, etc) and then use the free program File Splitter & Joiner to join them.

Then you feed the resulting files to Raw2CDNG -- it should work. It worked for me.

UPDATED: also I had been a fan of 28 May Build for long since it was stable and firm as a rock. Now I use Andy's new build and I would encourage you to try it -- you'll like it as well -- PINK frames are a history :

http://www.magiclantern.fm/forum/index.php?topic=5586.msg59779#msg59779

yes, I've noticed that too. Seems to only change the value on every other click of the wheel.

Andy, in this build I also lost the overexposure warning dots on my histogram, per channel. They are on in the menu for sure, just not displayed. Not a big deal, just so you know.

Thanks for the build, I like it )

Hello. I can't seem to figure out how to read and set my shutter speed settings in ML..

How come when every I make adjustments to ISO my shutter speed changes?

What are the Tv numbers?

Sometimes I can't get my shutter speed setting down to 1/48, how come?

Thanks

Welcome to the world of under-development and not-final software, bro ))))

Try this build by Andy:

http://www.magiclantern.fm/forum/index.php?topic=5586.msg59779#msg59779

It does adjustment of shutter much better than some previous builds.
It has some... feature that you must be aware of (at least in my camera): when you rotate the front wheel to change the shutter speed, nothing may change. Keep rotating, and the values will start changing. It's a small quirk and once you know it - you are golden. I'd like to repeat: it's much better than previous builds )

[akumiszcza]

http://www.magiclantern.fm/forum/index.php?topic=5654.msg39968#msg39968 et al.

akumiszcza, my heartiest THANKS! much easier than I thought of.....

Hey people,

I was shooting today a test shoot with my 50D for a commercial. I'm pretty amazed with images and this is a good start.

But once I overlooked the size of a clip and it got split into 2 parts.

I remember that some 20-30 pages back someone was explaining how to stitch them with some hex editor.... If anyone can help to find that spot, I'll be gratefull. Search on the forum didn't help (

Thanks!

.....you weren't hoping for 1/25 in 30fps mode?......

))) My only hope was 1/50 @25fps - my main shooting setup in 99% cases.

Thank you, 1%

Looking forward to it having been fixed. If you need me to video shoot the monitor with such specific cases, let me know.

Those speeds are just gain.

Turn off movie recording. Now set a shutter like 32" with expo override on. It will get bright, turn down the aperture and look at the wonderful lines of noise on the screen.

Ok, I see, but a very practical situation:

I'm trying to change shutter speed from 1/25 to 1/50, the value gets stuck somewhere at 1/37 and then ISO starts changing, and I get 800eq on the screen while LCD shows 1600.

Now, what should I do next? How must I understand this quirk?
(LiveView On, ETTR disabled, exp. OVERRIDE ON)

Re: STRANGE SHUTTER SPEEDS

Thanks people for your fast replies.

Now, the LiveView was ON for sure.
I disabled ETTR module completely (basically I don't get the whole idea of auto adjustment of exposure components - they are valuable creative tools for me).
Exposure override was ON as I can remember.

I'm asking all this because there was no such problem in Build 28 May. At all I mean. I was setting shutter speed manually 1/50 or 1/8000 and I could tell from shooting a moving object  it WORKED.

Hey all,

I still have some strange behaviour in the latest unified builds:

When I adjust shutter speed in M mode, it does not change freely but at some point ISO starts changing. So I get 800eq while the top LCD shows 1600 ISO.

Will appreciate any tips.

ALSO, recently shot BMCC against 50D in terms of DR. Black Magic definitely wins, but not overwhelmingly. If anyone is interested I will post results.

Is there any chance to use one of the mosaic engineering filters in 50D an reduce moire and aliasing?

It has been discussed 2-3 times earlier in this thread. To put it short: no.

wow amazing work! ML RAW is insane for the 50d
any idea of the dynamic range we are getting?

I guess it's around what we get from still RAWs. But needs some testing...