Author Topic: uncompressed 14-bit RAW video recording  (Read 635357 times)

hawkish

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Hi - just venturing deeper into these RAW waters w my 5Dmk2 and a KomputerBay 64 GB 1000x
.
I'm experiencing repeated *buffer underrun-related automatic rec endings* w. dropped frames...
@ 1880x720 and even @ 1280x720

Would be great help to have a checklist here (couldn't locate one yet) on *optimizing buffer usage* parameters
(did i read somewhere about 'buffer doubling' or similar..? my screen says not enough memory "109+2048, would need 128" minimum)
and similar to get max. data write values. Altho my cam's benchmarks check shows good basic write >70values,
RAW recordings don't appear to be reliably homogenous  - or am i missing something basic...??

thanks for any swift help!

5Dmk2, KomputerBay 64 GB 1000x, ML nightly builld (13.05.2013)
5D2, KomputerBay 1000x etc

GregoryOfManhattan

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Re: uncompressed 14-bit RAW video recording
« Reply #1626 on: May 30, 2013, 11:32:56 PM »
reporting on 50D.
14bit 50D can record raw video at 1536x928 24fps data-rate 57 MB/s up to 4G limit
.raw can be processed to DNGs with raw2dng
(this is with build merged with today's unified e4fc7c7)

beyond 4G limit, spanning files are generated but cannot be processed by modules/raw_rec/raw2dng

more details on 50D and 40D thread http://www.magiclantern.fm/forum/index.php?topic=5586.0

tonybeccar

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Re: uncompressed 14-bit RAW video recording
« Reply #1627 on: May 31, 2013, 03:01:09 AM »
Hello! I've followed almost all the threads in the forum, and I have one doubt. Given that I don't own a 5D3 and therefore cannot test the firmware.. I wanna ask:

Does the 4GB file splitting work in normal recording mode? Or just in RAW? If not, I guess you are like only a few steps away to implement it, right??

So happy with all the features you guys are making progress!!! Wishing someday it will be available for the 7D :)

Cheers from Argentina!

Drewton

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Re: uncompressed 14-bit RAW video recording
« Reply #1628 on: May 31, 2013, 05:54:47 AM »
Some comparisons I did shooting RAW on 600D:

[spoiler]
H.264


RAW[/spoiler]

[spoiler]
H.264


RAW[/spoiler]

Redrocks

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uncompressed 14-bit RAW video recording
« Reply #1629 on: May 31, 2013, 06:10:35 AM »

5Dmk2, KomputerBay 64 GB 1000x, ML nightly builld (13.05.2013)

That's either an ancient build or a typo, try this:

http://www.magiclantern.fm/forum/index.php?topic=5533.0

nos

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Re: uncompressed 14-bit RAW video recording
« Reply #1630 on: May 31, 2013, 01:00:25 PM »

another short test with 5dm3. for me komputerbay 32gb 1000x doesn´t reach 1920x1080... 1280x720 works very good without any dropped frames. does anyone use this card and can shoot videos at 1080p?

later i will do a card benchmark to check the speed.

agora1

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Re: uncompressed 14-bit RAW video recording
« Reply #1631 on: May 31, 2013, 05:02:27 PM »
it is possible to open 4gig raw movie file canon 5d mark iii
from the latest raw2dng for mac I have this message "Error: This ain't a lv_rec RAW file"
Thanks

dadinio13

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Re: uncompressed 14-bit RAW video recording
« Reply #1632 on: May 31, 2013, 10:25:09 PM »
Hi to all!  :)
Firstly i'am a new member so i wanted to thank all the magic lantern team for their outstanding work.
I follow this topic from the first page and the developement of ML on the 5DIII and the project progresses very quickly.
I registered on the site now because I wanted to ask for more information about overexpose the image of raw video recording. Do I only overexpose the image serving me the apperture or what? for example, for highlights recovery is impossible to f2.8 at day with the sun at iso 100 and shutter 1/47 24 FPS?
sorry for my bad English... thank in advance for your help.
And again thank you for all efforts of the devs.

RenatoPhoto

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Re: uncompressed 14-bit RAW video recording
« Reply #1633 on: May 31, 2013, 11:17:12 PM »
for example, for highlights recovery is impossible to f2.8 at day with the sun at iso 100 and shutter 1/47 24 FPS?

Shoot in video mode and the camera in manual.  Use aperture as you wish.

You will find many Tutorials here: www.magiclantern.fm/forum/index.php?board=15.0

Make sure you read and understand the Forum Rules here:
http://www.magiclantern.fm/forum/index.php?topic=934.msg1141#msg1141
http://www.pululahuahostal.com  |  EF 300 f/4, EF 100-400 L, EF 180 L, EF-S 10-22, Samyang 14mm, Sigma 28mm EX DG, Sigma 8mm 1:3.5 EX DG, EF 50mm 1:1.8 II, EF 1.4X II, Kenko C-AF 2X

a1ex

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Re: uncompressed 14-bit RAW video recording
« Reply #1634 on: June 01, 2013, 12:57:05 AM »
Got an idea for squeezing a little more speed:

https://bitbucket.org/hudson/magic-lantern/commits/70d4c7456ed1
https://bitbucket.org/hudson/magic-lantern/commits/63d5922fdcd9

How it works:
- it also crops the source raw stream, hoping that it will reduce the DMA load, resulting in higher write speeds
- limitation: I only know how to crop it on the right edge, so for maximum effect, I had to move the cropping window to the far left. That's why the menu option is called "Framing: Force Left".
- I expect it to have maximum effect in 5x crop mode (where the source stream is ~3750x1350 on 5D3)
- You can combine it with hacked preview mode (which now has grayscale preview, done with CPU to keep DMA free)
- for 5x zoom, move the focus window a few steps to the right; that way, the recording window will be very close to the center of frame.

Also, ML preview is now zoomed, so it should help at lower resolutions.


dadinio13

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Re: uncompressed 14-bit RAW video recording
« Reply #1635 on: June 01, 2013, 01:15:54 AM »
Shoot in video mode and the camera in manual.  Use aperture as you wish.

You will find many Tutorials here: www.magiclantern.fm/forum/index.php?board=15.0

Make sure you read and understand the Forum Rules here:
http://www.magiclantern.fm/forum/index.php?topic=934.msg1141#msg1141

Thank you for your help! Sur, i read that rules right now ;)

Shield

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Re: uncompressed 14-bit RAW video recording
« Reply #1636 on: June 01, 2013, 01:56:15 AM »
for example, for highlights recovery is impossible to f2.8 at day with the sun at iso 100 and shutter 1/47 24 FPS?

You need a neutral density filter to knock down the light amount.  Any camera @ F/2.8 (well, any larger sensor camera) is going to be about 4-6 stops overexposed in sunlight.  I use a variable ND filter or shoot at F/8-F/22.  You can adjust your shutter so it's a bit faster too, but watch out for things like flowing water / fountains else it'll be too jerky.

Google and read about ND filters if you want to shoot wide open in the daytime.  My ND filter (and I've owned Singh-Ray) of choice is the Tiffen 82mm ND; just under $200 at B&H and I don't need any step-up rings for my Tamron 24-70 2.8 USD VC.

Shawn

dthost

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Re: uncompressed 14-bit RAW video recording
« Reply #1637 on: June 01, 2013, 04:25:03 AM »
I posted this in the 5d2 RAW thread but I felt this also applied to any of the cameras

after hearing about the new raw feature I was trying to find a cool practical use for it, and the big thing that came to mind was time lapses without adding shutter actuations

video link....

This test took 1 hour out behind my house, pretty dark aside from the full moon blasting the scene
5D Mark 2 May 20th build
640 ISO
T/1.5
FPS Override 0.178
RAW Video 1880x1250

I had to really adjust the color in post because the RAW kicked the magenta up a lot
Also had artifacts at the bottom of the frame

http://i.imgur.com/G1N6ya8.jpg

and there was this weird problem where every other frame was the first frame...
so instead of capturing 323 I actually captured 162

162 frame time lapse without adding any actuations

Yomommassis: have you done any further testing, and managed to get rid of the repeating first frame? Your still image looks excellent: I've been using the FPS override for timelapse a lot lately (stable build only), and have been very disappointed with the image quality (particularly sharpness)... doesn't cut well with timelapse shot using RAW stills only. Would be happy with a FPS overide that produced "only" 1000 RAW image files to work on later in Lightroom or similar.

DerekDock

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Re: uncompressed 14-bit RAW video recording
« Reply #1638 on: June 01, 2013, 04:35:16 AM »
Finally got the post processing done on our shooting last weekend. Video looks great but the post workflow is a headache. Will really use this for a shot or two per shoot but never everything unless the clients are paying for it.

Check it out and see the details in the description: http://vimeo.com/67422760

Audionut

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Re: uncompressed 14-bit RAW video recording
« Reply #1639 on: June 01, 2013, 06:43:16 AM »
Development discussion should continue in this thread

General banter should continue in this thread