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Topics - 70MM13

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Share Your Videos / 5d3 3x3 vs 1x1 modes, a new question...
« on: March 22, 2023, 10:59:48 AM »
An additional note regarding the 5d3:  since it is now capable of such high speed data writing, 1920 probably wouldn't require data compression, freeing up CPU resources for resampling.


I intended to shoot this video at 3616x1536, but there was a problem, even with card spanning and sd 240mhz overclock...

because of the bare branches on all the trees in the forest, the scene is just too complicated for that resolution, even when underexposed!

i had already shot the "beauty shot" for the middle of the video of the baby chestnut in the morning sunlight at that resolution, but when i got immediate sudden stops repeatedly in the forest i decided to shoot this talk at 1920 for reliability, using 3x3 mode since i was shooting at f/2.8 so there would be no problem with aliasing and moire on all the branches of the trees.

i wanted maximum detail on the closing shot of the cloudy sunset through the trees, so i shot that using 1x1 mode.

i was really surprised when i was editing the video to find that there was so much aliasing on the 1x1 shot!

to see the 1x1 footage, skip to 8:50 and pause it before the messages pop up for other videos.  the problem is very clear in the upper left corner of the screen.

i used 4x supersampling in resolve with gaussian sampling to minimize the problem, but it is still bad.

seeing this made me wonder if it is possible to do better resampling (even simple bilinear) of the full sensor down to 1920 instead of the horrible binning.  i know that it is beyond the capabilities of the cpu in most of these cameras, but has anyone done any experiments with this at all?  maybe certain dual cpu cameras could do it?  it makes me wonder if this could be done well in the very recent crop sensor models that have a newer (faster?) cpu.

it's just a thought...

on another note, if anyone is interested i could share a full sensor resolution still of the extremely challenging forest shot to use for a "stress test" of card overclocking.  if you print it out at full resolution, it could be useful as a "standard" torture test.  there was no wind at all in the forest and the camera was on a locked tripod, so a still should be just as difficult, especially with perfect exposure.

view the video at 4k, of course.

Share Your Videos / 5d3 3k super sharp video
« on: March 12, 2023, 01:22:31 PM »
with the renewed debate about 3k, i decided to shoot my latest forest video in 3k, utilizing resolve's superscaling algorithm to bring it up to 4k using 4X upscaling:

must view at 4k to see it correctly!  check out the incredible smoothness of the razor sharp spider webs that are clipping in the sunlight...

ps: i'll send some frames to ml700d

Share Your Videos / macro video 5d3 raw
« on: March 06, 2023, 09:40:51 AM »
IS was a lifesaver for a handheld focus pull at maximum closeup on the tiny redwood bud!

watch in 4k to bypass youtube quality degradation...

Share Your Videos / Global warming video: 5d3 raw
« on: February 22, 2023, 12:51:42 PM »
The winter that wasn't...

Long point, Ontario - February 20, 2023
View in 4K for original quality.

Share Your Videos / 5d3 ISO 200 in dim light
« on: January 01, 2023, 07:03:35 PM »
sometimes you want as much dynamic range as possible, even in very dim light, and with the 5d3 that means iso 200...

check out the beautiful detail on the LEDs in a nearly dark room, with the shadows severely lifted in post.

shot in 3616*1536 continuous (thanks bilal!), and upscaled to 3840 using sinc algorithm in resolve.

watch in 4k to avoid the horrible quality degradation of youtube imposed on videos with <3000 views.

best wishes to everyone!

Academic Corner / interesting image compression!
« on: September 28, 2022, 02:21:17 PM »

Share Your Videos / 5D3 3616*1536 dark studio music video
« on: September 08, 2022, 01:58:32 AM »
seriously dim lighting except the vocal booth, which unfortunately was a little too bright!

I'm now making the occasional Blender3D tutorial video.  This one (the second in the series) covers workarounds for the "eccentric" rigid body simulation to make a chain that doesn't break:

Share Your Videos / Extreme dynamic range in the forest - 5D3
« on: July 10, 2022, 12:11:54 PM »
A short but sweet exploration of the forest in early morning.  The extreme dynamic range isn't even apparent in the resulting video because it was so easily controlled!
Every shot has both clipped highlights and lifted shadows, sometimes by many stops (such as the closeup of the chestnut tree bark).
Watch in 4k!

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...

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:

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.

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!

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:

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.

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!

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...

Share Your Videos / MLVapp - Resolve hybrid video
« on: February 05, 2022, 01:08:14 PM »
timbytheriver suggested I should try using mlvapp to do basic exposure and colour temperature adjustments and then use the arri preset to export for editing and final grading in resolve in arri log c (using the CST plugin).

I gave it a shot for this music video and I'm hooked!  The fantastic mlvapp colours make it into resolve!

Shot in 14 bit raw on my trusty old 5d3 @ 3616*1536 using card spanning and overclock. (except the cellphone footage of the guitars!)

Share Your Videos / a Christmas message for people in pain
« on: December 26, 2021, 12:28:47 PM »
Best wishes to everyone.

Share Your Videos / TOO DARK for dual ISO!
« on: December 24, 2021, 04:35:33 PM »
The opening scene of this video is by far the darkest scene I have yet pulled off, far darker than the candlelit scene (which had nothing but 6 candles).
ISO 1250, shot at 3616*1536, 14 bit lossless with card spanning and overclock.  NO noise reduction, exposed for the fiber optic light curio.

The rest of the video is dual ISO with much more light.

Watch in 4k in a very dark room!

Read the video description for more info.

Share Your Videos / 16x9 4k ambient video
« on: November 29, 2021, 12:12:42 PM »
This seems to be the limit of what can be done with the 5d3.
I'd like to try the sensor calibration that has been stalled for years, and I'm willing to risk frying my sensor!

Share Your Videos / ACES 0.1.1 music video
« on: November 27, 2021, 01:47:47 PM »
I've gotta say, ACES 0.1.1 in resolve 17 is pretty amazing for magic lantern raw footage!

watch in at least 1440p for no quality loss.

5d3 14 bit

Share Your Videos / "The lost butterflies" remastered
« on: November 17, 2021, 11:49:20 PM »
shot by myself and timbytheriver on our 5d3 cameras, one on each side of the atlantic ocean ;)

Share Your Videos / 5D3 music video 4k remastered
« on: October 30, 2021, 12:19:10 PM »
shot in 14 bit 23.976 fps 3840x1536 using card spanning and overclock.  the candles are the only light source.

Share Your Videos / 5D3 1080 3x3 unleashed
« on: September 19, 2021, 05:39:00 PM »
The new debayering algorithm in resolve 17 works wonders with 5D3 3x3 footage!
It's so great that I no longer use other modes.
Real time correct preview is another treat!
Everyone with a 5D3 needs to try this.  I hope someday mlvapp will be able to debayer this well!
Seriously, this is a whole new lease on life for the 5D3.  I wonder if the 5D4 has a similar 3x3 mode?  Imagine what it could do with that improved sensor...

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