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Go Back   Blu-ray Forum > Displays > Display Theory and Discussion


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Old 02-23-2018, 05:29 PM   #1
HDTV1080P HDTV1080P is offline
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Enabling native frame rate gives one a better picture quality for 4K/24fps Netflix movies and 1080P/24fps movies. However since the menus are 30fps or frame doubled to 60fps, there is a delay in the navigation.


Apple TV 4K had the same problem with their BETA software when native frame rate was enabled. According to page 21 of the April 2018 Sound and Vision magazine the Apple TV just recently released a new public firmware that offers native frame rate like the Roku Ultra.


quote from page 21 of April 2018 Sound and Vision magazine:

"This Just in..."

"Apple TV 4K now switches display settings to match native frame rate and dynamic range. It was enabled via update..."
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Old 02-23-2018, 10:32 PM   #2
RockyIII RockyIII is offline
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Quote:
Originally Posted by HDTV1080P View Post
Enabling native frame rate gives one a better picture quality for 4K/24fps Netflix movies and 1080P/24fps movies. However since the menus are 30fps or frame doubled to 60fps, there is a delay in the navigation.


Apple TV 4K had the same problem with their BETA software when native frame rate was enabled. According to page 21 of the April 2018 Sound and Vision magazine the Apple TV just recently released a new public firmware that offers native frame rate like the Roku Ultra.


quote from page 21 of April 2018 Sound and Vision magazine:

"This Just in..."

"Apple TV 4K now switches display settings to match native frame rate and dynamic range. It was enabled via update..."
Yes but the delays when navigating menus make this feature not worth enabling. My oled tv can't even find the signal for a good 7-10 seconds when exiting YouTube app.
What's so wrong about playing all sources at 60Hz? The TV will just do 3:2 pulldown for 24fps sources and play 60fps flawlessly

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Old 02-24-2018, 07:24 PM   #3
HDTV1080P HDTV1080P is offline
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Sony Blu-ray players streaming feature handles the 24fps issue better. The 2 or 3 second flicker normally only occurs once when switching from 60fps to 24fps, and then Sony leaves the menu navigation at 24fps instead of switching back and forth between 24fps and 60fps. The display will then display the movie at multiplies of the original frame rate.


If the switching is to much for the streaming programs you watch on Roku, then just switch the native frame rate feature off. Maybe Roku one day will come out with a firmware update that will force the menus to remain at 24fps instead of switching back to 60fps in Netflix, etc. Some displays will do a reverse 3:2 pulldown for film based material and restore the original 24fps and then flash the image on the screen at multiples of 24fps. Of course direct 24fps with no conversion of the frame rate to 60Hz is ideal. 60Hz with 3:2 pulldown adds judder during camera pans and fast moving images on the screen. All native 24fps movies in commercial movie theaters are shown at either 24fps or multiplies of 24fps with no 60Hz 3:2 pulldown judder.
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Old 02-24-2018, 08:40 PM   #4
RockyIII RockyIII is offline
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Quote:
Originally Posted by HDTV1080P View Post
Sony Blu-ray players streaming feature handles the 24fps issue better. The 2 or 3 second flicker normally only occurs once when switching from 60fps to 24fps, and then Sony leaves the menu navigation at 24fps instead of switching back and forth between 24fps and 60fps. The display will then display the movie at multiplies of the original frame rate.


If the switching is to much for the streaming programs you watch on Roku, then just switch the native frame rate feature off. Maybe Roku one day will come out with a firmware update that will force the menus to remain at 24fps instead of switching back to 60fps in Netflix, etc. Some displays will do a reverse 3:2 pulldown for film based material and restore the original 24fps and then flash the image on the screen at multiples of 24fps. Of course direct 24fps with no conversion of the frame rate to 60Hz is ideal. 60Hz with 3:2 pulldown adds judder during camera pans and fast moving images on the screen. All native 24fps movies in commercial movie theaters are shown at either 24fps or multiplies of 24fps with no 60Hz 3:2 pulldown judder.
Yes of course 5:5 cadence will look better than 3:2 pulldown on panning shots especialmy, but I prefer that to the annoying delay during menu navigation.
YouTube 4K HDR is mostly in 60fps anyways.
Oh and I absolutely love the fish tank as the new screensaver!

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Old 11-22-2018, 05:18 PM   #5
HDTV1080P HDTV1080P is offline
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The 2016 Roku Ultra 4640R originally sold for $129.99 back in 2016 and it had a optical digital audio output. The 2017 Roku Ultra 4660R had a list price of $99.99 but dropped the optical digital output (Black Friday sale of $55). The 2018 Roku Ultra 4661R has a list price of $99.99 and appears to be exactly the same as last year’s model (maybe internally more integrated circuit board but externally exactly the same as far as I can tell).Black Friday sale on the 2018 model is $49.99 which is 50% off the list price.


It appears that Roku has no plans to make a upgraded external Roku Ultra model with Dolby Vision HDR, HDR10+, etc. One needs to purchase a new flat panel screen with Roku built in to get Dolby Vision HDR. Projector owners are not going to be able to stream in Dolby Vision HDR because of no external streaming boxes that support Dolby Vision HDR (So far only high-end Cinema quality DLP projectors support Dolby Vision HDR).
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Old 11-22-2018, 05:20 PM   #6
RockyIII RockyIII is offline
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Quote:
Originally Posted by HDTV1080P View Post
The 2016 Roku Ultra 4640R originally sold for $129.99 back in 2016 and it had a optical digital audio output. The 2017 Roku Ultra 4660R had a list price of $99.99 but dropped the optical digital output (Black Friday sale of $55). The 2018 Roku Ultra 4661R has a list price of $99.99 and appears to be exactly the same as last year’s model (maybe internally more integrated circuit board but externally exactly the same as far as I can tell).Black Friday sale on the 2018 model is $49.99 which is 50% off the list price.


It appear that Roku has no plans to make a upgraded external Roku Ultra model with Dolby Vision HDR, HDR10+, etc. One needs to purchase a new flat panel screen with Roku built in to get Dolby Vision HDR. Projector owners are not going to be able to stream in Dolby Vision HDR because of no external streaming boxes that support Dolby Vision HDR (So far only high-end Cinema quality DLP projectors support Dolby Vision HDR).
But it's very wife-friendly so it stays
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Old 11-22-2018, 11:06 PM   #7
HDTV1080P HDTV1080P is offline
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There are many online companies that are running out of stock on the 2018 Roku Ultra because of the 50% off Black Friday sale. At this price some people are purchasing several to upgrade their existing projectors and displays to stream Roku (One can purchase two Roku Ultra’s for the price it costs for one). The cheapest price online that currently has free shipping for the Roku Ultra 4661R at $49.99 is P.C. Richard & Son.

A high end Scan Disk 64GB microSDXC card with 95MB per second read speed and 90MB per second write speed that normally has a list price of $55.99, can be purchased from B and H Photo for $17.99 with free shipping as a black Friday special (SDSQXWG-064G-ANCMA).This is high high performance storage for the several thousands of streaming channels. Back in 2016 the cheapest comparable 64GB microSDHC card cost around $43.95.

Last edited by HDTV1080P; 11-22-2018 at 11:40 PM.
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