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This video covers:
- a bit about LED screens - what they are, how the image is formed, the most important parameters you need to look up if you want to rent some for your shoot (such as pixel pitch, optimal viewing distance,PWM, refresh rate),
- the 2 artefacts that can appear on camera (flicker and moire),
how to avoid getting flicker (or fix it if you do), and
- a big chunck is dedicated to how to prevent or minimize moire during shooting
If you're looking for How to remove moire from LED screen in post- production check out this video: How to remove moire in Davinci Resolve - • How to remove LED wall...
00:00-00:34 Intro
00:34-01:01 LED screens vs green screen
01:01- 01:58 What is an LED display made of
01:59-02:17 How is an image created on an LED screen
02:18-02:24 Parameters used to describe an LED screen
02:25-02:57 Outdoor LED displays (includes “optimal viewing distance” and “IP rating”)
02:58-04:21 Indoor LED displays - “pixel pitch”
04:22-04:37 LED artefacts
04:38-06:49 Flicker (includes “PWM” and “refresh rate”)
06:50-07:08 Flicker conclusion and how to eliminate it
07:09-08:00 Moire
08:00-11:18 How to minimize moire during shooting
11:18-11:56 Practical quick tests using with Sigma FP
11:57-13:37 Recap
Music - www.epidemicsound.com: Sneak Out Together - Rasmus Faber
Resources used in the research of the video:
Advantages of LED over green screen:
-Why 'The Mandalorian' Uses Virtual Sets Over Green Screen | Movies Insider: • Why 'The Mandalorian' ...
- Bromton technology, The pros and cons of LED screens as Green Screen replacement: www.bromptontech.com/the-pros...
LED screen tech stuff:
- LED craft inc, Difference between DIP and SMD type LED modules, www.ledcraftinc.com/differenc...
- LED Sign Solutions, LED Pixel Pitch and Resolution: ledsignsolution.com.au/led-si...
- Twleddisplay, How do the numbers in SMD determine LED display: www.twleddisplay.com/blog/how...
- Unit LED, 2021 Comprehensive guide for small picel pitch LED Display: www.unit-led.com/small-pixel-...
- www.visualeader.com/
- www.doitvision.com/
- www.clearleddisplays.com/
- Flexfire LEDs, What are LED IP Ratings? www.flexfireleds.com/led-ip-r...
- Samsung news, Samsung to Build First Virtual Production Studio with CJ ENM Leveraging Leading Display Technology: news.samsung.com/us/samsung-c...
- Kabaddi Games: Chapman steps into the future of cinema with virtual LED production wall www.kabaddi-games.com/chapman...
Flicker and moire:
-RED Flicker-Free video tutorial: www.red.com/red-101/flicker-f...
- Advatech lighting, Refresh Rate and PWM www.advateklights.com/knowled...
- TFT Central, PWM tftcentral.co.uk/articles/pul...
- Environmental Lights, PWM www.environmentallights.com/l...
- Digital View, Led Brightness and PWM www.digitalview.com/blog/pwm-...
- Artleds, Learn the differences between Refresh Rate and PWM rate in LED pixels tinyurl.com/ycxnp3rz
- japanistry, Moiré, False Colour & Anti-Aliasing Filters www.japanistry.com/moire-fals...
External OLPFs
- www.mosaicengineering.com/
- www.caprockdev.com/
Anti-moire screens:
-www.stewartfilmscreen.com/en/...
-Av-IQ display: tinyurl.com/2p8dtb64
-Rosebrand: tinyurl.com/4uy79nbc