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Messages - muanthang

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General Help Q&A / Re: Some questions about specific terms around ML
« on: August 12, 2020, 03:04:25 PM »
Hi ML users,

I'm new to the ML world, I just discovered this forum and read almost every topic around 5DM3/M2 Raw capabilities and other stuff.
I am a young french camera assistant that just begun working in the cinema industry and I'm super interested in understanding all of the video worflow from light captured by the sensor to the post-production and deliver to customers (Cinema/TV/internet).

Through my researchs, I've been faced with a lot of technical terms that seems really important if I want to get the best from ML or simply to understand how video camera works. Can somebody help me answering some of my questions ? I think this post could be very useful for new user of ML like me.

Pixel binning : How does it work with a CMOS RGGB sensor ? Is it a process done before or after photocytes charges are read and turned into data ? Does it really helps reducing noise ?
Also, I've seen a 5.7k anamorphic build for the 5DM3 that use 1x3 bining 1920pix then unsqueeze the raw file in post to get back the 5760 horizontal pixel from the sensor. Does it imply pixel binning can be reversed in post ?

1:1 pixel readout mode : So, it means that all photocytes in the captured area of the sensor are recorded ?

Oversampling and downsampling : I'm really confused about the difference about those two (if there is any) and when can we use them. I've seen a debayer process that combines 2x2 pixels to form "super" RGB pixels. Is this downsampling ? Can we downsample an RGB or YCbCr picture already debayered ? In a 1080p screen (like my laptop), a UHD video file downsample to 1080p and the same UHD video exported full res will appear different ?

lossless RAW : I guess it's a RAW video file that is compressed with a lossless compression ? So, different than uncompressed RAW

Debayer process : This is a huge one. I know what's the idea behind it and already found some articles about things like bilinear or AMaze. I'm more interested about the reasons to choose a process instead of another in MVL App. And, in Davinci Resolve, I never saw an option to choose a specific process. So do you know what debayer process software uses ? Does it depend on the camera that shoot the file ?

SD overclocking and card spanning : Can you explain what are they ?

Upscaling : 5DM2 can record 1824x1026p RAW video. If I want to deliver a 1080p video, I need to upscale my file. How does it work with pixels ?

Centered crop mode : What is the meaning of "centered" ? Does it mean other crop modes aren't centered ?

Thanks a lot and have a nice day.

“There are some questions that shouldn't be asked until a person is mature enough to appreciate the answers.”
― Anne Bishop, Daughter of the Blood


General Chat / Re: Help with understanding. 10bit H.265 vs 10bit RAW?
« on: July 11, 2020, 07:46:25 PM »
Camera Type: Mirrorless
Announced: 9th July 2020
Sensor: 45Mp Full-frame Dual Pixel CMOS AF II
Processor: Digic X
Lens mount: RF
Sensitivity range: Stills: ISO 100-51,200 expandable to ISO 50-102,400, Movies: ISO 100-25600, expandable to ISO ISO 51,200
Canon EOS R5 formats: Raw + Jpeg/HEIF, MP4
Maximum continuous shooting rate: Mechanical shutter: 12fps, Electronic shutter: 20fps
Maximum video resolution: Uncropped, internal raw recording 8K video at up to 29.97fps in 4:2:2 10-bit in Canon Log (H.265) or 4:2:2 10-bit HDR PQ (H.265), Uncropped internal recording 4K video at up to 119.88fps in 4:2:2 10-bit in Canon Log (H.265) or 4:2:2 10-bit HDR PQ (H.265) 4:2:2 10-bit in Canon Log or 4:2:2 10-bit HDR PQ, 4K output over HDMI at up to 59.94fps
Autofocus system: Dual Pixel CMOS AF II phase detection with 5940 points in stills and 4500 points in movie mode
Viewfinder: 0.5-inch 5.76million-dot OLED electronic viewfinder with 120fps display and 0.76x magnification
Screen: 3.15-inch 2.1-million dot vari-angle touchscreen
Autofocus: Dual Pixel CMOS AF II with Advanced Animal AF (recognising dogs, cats and birds) supported in all video modes with 100% coverage and up to 1053 ‘AF segments’
Stabilisation: In-body image stabilisation (IBIS) that works with lens IS and enables up to 8-stops of shutter speed compensation
Storage: Dual slots, 1x CFexpress, 1x SDXC UHS-II
Dimensions: 135.8 x 97.5 x 88mm
Weight: 650 g / 738 g with card and battery

Raw Video / Re: Would like to try 5D3 10 bit & 12 bit
« on: June 14, 2020, 05:41:13 PM »
Using i could record  non stop  anamorphic  12 bit losless  3840x1632  with realtime preview .[url]/url]
recording  in anamorphic 12 bit losless 5760x2232 recording stopped after 10 seconds

Yes, I understand what you mean, but what is a real purpose for such a preview? The proportions aren't correct, we can only see a massively stretched top part of an image.
Danne, for me  continuous recording  in  anamorphic 1600X2332< 16:9! :) :) :)  another way round to  preview  framing before recording  is   press hold the AF Lock button (the  lens  should  be  in AF  Mode)Cheers...

Posted two new builds:

Mainly I separated 45/48fps modes into two and they run in either 50 or 60p mode. Upscaled 48fps to 1060p:

New build anamorphic  test in5Diii 123. Thank you

Raw Video / Re: Full-resolution LiveView: 5796x3870 at 5fps
« on: September 01, 2017, 09:54:06 AM »
could  you   upload  the  video  in full resolution  if  possible

General Help Q&A / Re: Lexar or SanDisk for Canon 5D3 MLV?
« on: August 22, 2017, 09:14:19 AM »
i have 64GB Lexar and 32GB SanDisk Extreme Pro.Both worked  flowlessly  shooting  Raw  in my 5D Mark III

Share Your Videos / 5D MARK III RAW 14 Bit
« on: August 20, 2017, 06:56:33 AM »

General Help Q&A / Re: Magic Lantern 5D Mark 3 Update
« on: May 19, 2017, 11:32:35 AM »
Updating Magic Lantern

Simply delete your old Magic Lantern files from your card and copy the new ones.
You can keep your configuration files (the ML/SETTINGS directory from your card).
 Is  this  my  solution.And  Lastly  can  i  revert    back  to  the former nightly  build   after   upgrading .

General Help Q&A / Magic Lantern 5D Mark 3 Update
« on: May 18, 2017, 10:04:52 AM »
I  am  still  on  magiclantern-Nightly.2015Dec20.5D3123.How  do I  install or  update to magiclantern-crop_rec_4k.2017Apr29.5D3123. someone help  me  .

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