Forum Discussion

taylorcw's avatar
taylorcw
Streaming Star
7 years ago

FHD vs UHD resolution

I've not been able to find previous posts on my specifics, so hoping someone can help me out

Based on this Roku[/url:1kmdmcgg] support doc, in a Roku app, if you have your ui_resolutions=fhd, this is designed for 1920x1080 or 1080p size.  For displaying images (not videos), shouldn't there be an option for UHD, 3840x2160 or 2160p?  While videos can scale up to 4k, why are images & channel limited to 1080p? 

Thanks in advance.
/ct
Roku Developer Program

2 Replies

  • RokuBen's avatar
    RokuBen
    Community Moderator
    7 years ago
    This is just the UI size.  On the Roku devices, you have a graphics plane (which is either 720p or 1080p) and a video plane.  The video plane is the native output size for the display and video is automatically scaled for it.  The graphics plane is where non-video content is displayed.

    Currently, 4K devices support both 720p and 1080p UI, while HD devices only support 720p.  This is usually due to the amount of memory available on the device, since FHD graphics require more memory to display.  Also, many devices have limited graphics acceleration capability, which makes putting a fluid UI on screen at higher resolution problematic.