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Topics - Levas

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1
Hello pixelpeepers,

I was wondering if people already seen/tested the difference in video quality of 10bit magic lantern raw vs 14 bit magic lantern raw.
I've used 10 bit raw today in the real world. And I'm used to color aliasing, and in most cases I have no problem in removing the color aliasing.
But the footage I shot today got very hard to remove, or almost impossible to remove, color aliasing.
Could it be explained in the difference between 10bit vs 14 bit, could that give more color aliasing ?
Or was it just a coincidence, since I shot a lot of bricks today, while visiting an old castle :P


2
General Development Discussion / 1000d - help needed with compiling
« on: October 08, 2016, 03:07:08 PM »
Hi there,

I want to mess around with ML and the 1000d.

I don't no much(or anything at all) about compiling magic lantern and the c language.

Long ago some work has been done by Coutts
http://bitbucket.org/coutts/1000d_dev/src

I used the instructions in this post to be able to compile
http://www.magiclantern.fm/forum/index.php?topic=16012.0

I'm now able to compile the standard platforms, like for example the newest 6d build. I get the fir, autoexec.bin and the zipfile.
But I can't get it to work with the stuff Coutts has made.

I get this error message in terminal:

rm *.o; rm AUTOEXEC.arm.elf
rm: *.o: No such file or directory
rm: AUTOEXEC.arm.elf: No such file or directory
make: *** [clean] Error 1

So there are some linking problems, but I don't know where to link to these files, I know they are available in the 'gcc-arm-none-eabi-4_8-2013q4' folder on my home directory

Anyone here willing to help/ suggest ideas

3
Saw this new photo editing program Affinity.
http://affinity.serif.com/en-gb/

supported cameras:
http://affinity.serif.com/forum/index.php?/topic/4630-supported-develop-raw-cameras/

I'm curious how it handles magic lantern video dng's, anyone tried it yet ?
I can find nothing about the debayering it uses, so it probably uses one technique...is it any good for line skipping video files ?

4
A1ex is talking about a temporal antialiasing filter. See quote at the bottom of this post.

I like the idea and was wondering if it is possible to control the aperture in video mode during one single frame ?
Let's say you're filming in PAL (25fps).
Is it possible to use a shutter of 1/25th of a second and for example use:
f22 for 1/100th of the time
f4.0 for 1/50th of the time
f22 for 1/100th of the time.
Which results in one single frame which took 1/25th  of a second?

Or, does anyone know if it's possible to use this in full res silent picture mode.
Let's say, time-lapse with 10 seconds interval. Can I get a 10 seconds single exposure, where the diafragma is f22 in the first and last few seconds of exposure and in the middle a seconds of f8 exposure ?

------------------------------------------------------------------------------------------------------------
Quote from A1ex in topic: www.magiclantern.fm/forum/index.php?topic=11787.150;topicseen

Another neat trick that can be done with a high-fps sensor, even if the final output has a low fps: temporal antialiasing filter.

Other companies did it in a different way, but the end result would be pretty similar:
http://tessive.com/time-control-faq/
http://www.red.com/learn/red-101/cinema-temporal-aliasing

and it was discussed here as well:
http://www.magiclantern.fm/forum/index.php?topic=5074
http://www.magiclantern.fm/forum/index.php?topic=8555.msg82898#msg82898

I'm going to implement this in ML for timelapse, with these functions. It will probably drain the battery pretty fast (because the sensor will be capturing light all the time), but it should give a very nice motion blur. Didn't try, but the theory makes sense.

This is also possible in post, but not practical (you would have record at say 300 fps and transcode to 24).

5
General Chat / Open platform community - Olympus
« on: September 22, 2014, 10:27:50 AM »
Olympus starts something called the Open platform community

http://opc.olympus-imaging.com/en/index.html

Sounds like an open source m4/3 camera, with this approach, m4/3 could get interesting  :D

6
 ;D

stupid idea but:

Would it be possible to activate the canon lens cleaning function(shaking the first low pas filter continuous) while recording raw video ?
And would it be possible that the lens cleaning function would act as a anti aliasing filter for video ?



7
 ::)

Is it possible for magic lantern to use the Canon in lens image stabilization to create multiple photo files with little shift in perspective so a super resolution image could be created from these multiple files ?
Just as talked about in this article:
http://appleinsider.com/articles/14/05/08/future-iphones-may-use-optical-image-stabilization-to-create-super-resolution-images

I believe this technique was also used in the past in camcorders, with a shifting sensor instead of optical image stabilization, but the results are the same, higher resolution...

I have no idea if this is possible for magic lantern, nor if there's interest from the users.
Would be nice to create some stunning high resolution landscape images...
Or use it for example for video, once we reach 50 fps on the 5d Mark III wit MLV video, I say, let's use image stabilization and create some stunning 25fps super resolution video...

8
Hello,

Lately I'm shooting live performances of musicbands indoors.(Loving the magic zoom and focus peaking for my manual lens!)
The light on stage varies a lot, so I'm shooting at fixed aperture and fixed iso and let the camera do the math for shutter value.
Most of the times I end up with hundreds of pictures, of which I select the best 10.

I was wondering if it is possible (in any way, maybe there are better alternatives then ML) to find out what the average shutter value is on all the photo's on my memory card.
If I have this information, I can consider for example a lower iso value (and know most of the pictures are still good and don't have a shutter time that's too long...).

So what I'm looking for is an option in ML that analysis the exif info of all the photo's on a memory card and return some numbers, for example:
The average, highest and lowest values of Aperture, Shuttertime and ISO.

If someone know's an existing solution for this, let me know, I'm on a mac(I know that spotlight can read the exif info) and use lightroom (is there any option in lightroom for this?).




 

9
I'm curious what is the max FPS people achieved with the FPS override function in ML in standard 1080p (in combination with rawrec or MLV-rec modules) ?

I'v seen and used ML builds for 6d where 35 FPS is possible in 1080p mode.
Did anyone got higher than 35fps with trial and error settings in the FPS override menu in ML ?

10
Raw Video Postprocessing / How to correct multiple images in RAW therapee
« on: January 06, 2014, 11:35:54 AM »
Hi fellow raw shooters,

Does anyone know how to edit multiple images in raw-therapee ?
I have a folder which contains all the DNG's from one sequence, I select one of them to edit (white balance, demosaicing etc), then I can copy the things I've edit to the clipboard, but then I'm stuck.
I can click on another picture and paste the edit on it, but I can't find a way or a button to select ALL the files in the folder at once and the paste the edit to ALL the images ???

Working on the latest Mac version of raw-therapee.

Used to work with Lightroom, but lightroom gives rather soft images compared to DaVinci Resolve.
Worked a while in DaVinci Resolve to find out that the demosaicing gives me more aliasing than lightroom. Especially with the Samyang 14mm lens (probably too sharp too handle)
Than I heard about Raw-therapee and the multiple options of demosaicing, tried it, WOW!!! Probably the best way to get rid of aliasing stuff.
But how do I batch process these images......

 

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