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Messages - 70MM13

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1
Share Your Videos / dual iso clipping improved
« on: June 22, 2022, 03:08:29 AM »
timbytheriver's dolby vision/rec709 trick with resolve made dealing with the clipped flames in the last shot of this video not only better looking, but far easier to deal with.

in the original grade, i had to resort to trickery such as adding another node to isolate the clipped highlights to desaturate them and add back a false colour.  not only was it no longer required but the natural colour actually looks good even though it is clipped...


2
Camera-specific Development / Re: Canon EOS R5 / R6
« on: June 12, 2022, 05:22:59 PM »
That's a great comparison, thanks very much!
The darks were far better on the R5 also.  Nice and crisp detail on the trunk of the beech tree.  The 6D was just mud.

If you are so motivated, a comparison of a very dark scene would be much appreciated, with the shadows lifted several stops...

3
Academic Corner / Re: ML dual iso in academic study
« on: May 30, 2022, 11:35:05 PM »
I'm curious if anyone who is familiar with the current approach would have any thoughts or inspiration resulting from reading it.

4
Academic Corner / Re: ML dual iso in academic study
« on: May 30, 2022, 08:43:28 PM »
does no one have any thoughts about his approach?

5
Share Your Videos / dual iso music video with dolby vision
« on: May 28, 2022, 10:10:33 PM »
pretty solid low light high dynamic range...
i re-rendered the closeups of the animated mouth, taking advantage of some of the new features in blender.  the differences are obvious between the closeups and the prior version in the camera-captured scenes:

6
Academic Corner / ML dual iso in academic study
« on: May 28, 2022, 01:15:28 PM »
Has everyone seen this paper from 2016?
I'm really curious about thoughts regarding this, particularly the performance of the ML method, from the upper echelons...
Dual iso has so much promise.  It requires a new approach to achieve any of its potential.

https://repositori.upf.edu/bitstream/handle/10230/28210/Bertalmio_ElectronicImaging2016_high.pdf?sequence=1&isAllowed=y

7
Also it is best to use EXR format if you want to load the files into blender...

8
i went against my instinct to make things as dark as possible on this dolby remaster, and it really highlights the difference it makes.  the dimly lit studio looks radiant!

9
if anyone is interested in blender, or just having fun with particle physics:

10
Post-processing Workflow / Re: fastcinemadng
« on: May 04, 2022, 01:12:05 PM »
I hope that "yet" is pointing to a brighter future.

I hope you get it working.  The painfully slow processing times and flickering issues make it nearly useless currently.

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Post-processing Workflow / Re: fastcinemadng
« on: May 03, 2022, 12:41:21 PM »
Is dual ISO a possibility for this software?

12
this video is an even better example of what dolby vision can do for our raw footage.  i shot it in 2018 while starting out tinkering with the preamp gains, and to put it to the test, i shot these scenes in the most challenging conditions possible.  i didn't expect any of it to look good, but of course i hoped...

with dolby vision, details in the colour emerge in very "bad" spots, bringing it to life!  a perfect example is when i open the fridge door in the very dim kitchen, and the blown out highlights on the top shelf have beautiful correct colour.  this happened without any tweaking or desperate measures...

while i was at it, i made some updated blender scenes taking advantage of the newly improved particle physics.  i'll be doing a video about this.


13
Share Your Videos / 5d3 candlelight video remastered in dolby vision
« on: April 22, 2022, 06:12:51 PM »
I thought this was already as good as it could get, but again, dolby vision gives just a little bit extra!

it was a little more difficult to handle the flames, as there were some vertical lines in them, but it was easy to fix in resolve by using a node that was keyed to them and applying blur on the red channel only.

watch in 4k!


14
Share Your Videos / automagic dolby vision grading
« on: April 18, 2022, 08:28:00 PM »
after having graded a bunch of videos with dolby vision, i've created a power grade for resolve that incorporates everything i've been doing manually, which actually isn't that much...  mainly sat vs sat and lum vs sat curves and a few other adjustments on the wheels.

i applied that power grade to this video, and did nothing else:


15
You should start a new thread asking that question!
I can't give advice on either of those two cameras since I use the 5d3, but I'm sure others will give you great advice!

16
General Development / Re: LiveView hacks (write speed improvement)
« on: April 07, 2022, 10:09:55 PM »
I'm definitely getting 140 MB/S on my 5d3 (113)

It fluctuates slightly in the load balancing between the two cards, generally around 60 for the SD and 80 for the CF.

Unfortunately sustained clipping, even mild, eventually leads to stopping.

I like to shoot challenging scenes with the green channel clipping a little bit, which is easily (automagically) corrected in post, and even that causes the recording to eventually stop.  It only needs a tiny bit more throughput!

Here's hoping it gets found one day :)

But a very slight reduction in resolution fixes that for now!

This should give plenty of headroom for the 3.3 and 3.5k modes with the realtime preview :)

17
General Development / Re: LiveView hacks (write speed improvement)
« on: April 07, 2022, 06:08:51 PM »
yeah, i enabled both cards and spanning and i also now have continuous recording at 3616*1536 23.976 @14 bits (unless overexposed)

amazing...

bilal, you are putting the magic back into magic lantern, brother!

18
General Development / Re: LiveView hacks (write speed improvement)
« on: April 07, 2022, 05:17:59 PM »
thanks for the update.

i'm only using the sd card for my test, since i thought that's where the gain would be...

sandisk 170 mb/s, same overclocking settings as you.

can you try just the sd card to see what you get?

19
General Development / Re: LiveView hacks (write speed improvement)
« on: April 07, 2022, 01:48:01 PM »
I tried it on my 5d3 (113) and it works, but i'm only getting about 3 MB/s improvement.  Nice, but not 13!

Is there something in the operation you didn't mention that might be obvious only to you?

20
I'm glad you enjoy them!
I'm in the Long Point Basin, on the north shore of Lake Erie, in the south of Ontario in Canada.

21
Share Your Videos / Dolby Vision unlocks the full spectrum of 14 bits
« on: April 05, 2022, 11:27:25 AM »
I've been re-grading more videos with Dolby Vision, and the results are fantastic.
This video was shot in low light, and the richness of the colour palette is phenomenal, with no banding to be found, and grading with Dolby is so easy!
Basically it only requires careful adjustment (rolloff) of the lum vs sat and sat vs sat curves on the right side of the curve. I'm guessing it is an issue somewhere with how resolve reads MLV DNG files?
It's not too difficult to adjust.


22
Share Your Videos / Re: dolby vision on outdoor footage
« on: March 23, 2022, 06:02:33 PM »
i'm not allowed to discuss that on this forum.

just take it as a mystery :P

23
Share Your Videos / Re: dolby vision on outdoor footage
« on: March 23, 2022, 11:31:08 AM »
sure...
superior results in resolve by using MLVFS.

https://1drv.ms/u/s!ApLIbwc4O9qTgSAuEymiP8Fjmrdi?e=bO6PPD

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Share Your Videos / dolby vision on outdoor footage
« on: March 21, 2022, 05:26:09 PM »
effortless grading with tim's dolby vision trick!
all i did was roll off the saturation on the highs and pull back the highlights to exactly 1000 nits on the HDR scopes...
the closeup at the end is breathtaking.
watch in 4k!

25
Share Your Videos / dolby vision improves challenging video footage
« on: March 18, 2022, 05:12:06 PM »
timbytheriver came up with a method for hybrid HDR-REC709 processing with Dolby Vision, and it made a dramatic improvement to this example video I shot a few years ago on my 5d3 (3072*1308 14 bit)

I previously had serious difficulties with the more extreme dynamic range shots, particularly the closeup of the oscilloscope.  It formerly required trickery such as spot exposure reduction on the LED to get the right saturation without losing all the contrast in the rest of the shot.  Now it was straightforward and looks great with no trickery!

This workflow also revealed details that were previously absent, such as the sky through the (filthy) windows in dimly lit interior scenes.  Incredible colour!

On another note, I was so pleased with the new grade that I re-rendered the blender animations, and in the process I found that the "eevee" realtime raytracer is now very close to production ready, so I used it, and it was a real game changer.  What a treat to see lighting adjustments on the fly...


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