[noggin]

Where do people get there 4k videos, in a **mobile** format  I was able to acquire an HEVC encoded movie a couple of weeks ago, through a not so reputable source to do some testing, will delete it when I get done testing.

From my results, only my Nvidia Shield and Zidoo X9S, and some of my **cheap Chinese** boxes running LibreELEC or CoreELEC could play that video.  Even my moderately powered Windows 10, desktop computer could not play that movie.  I do not have a 4k firestick to test.

To be noted, I have tested numerous 4k clips, and most of those clips play on most of my devices, but this REAL movie will NOT play on those devices.

Information from the Mediainfo Windows app.

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Commercial name                          : HDR10
Format profile                           : Main [email protected]@high
Codec ID                                 : V_MPEGH/ISO/HEVC
Duration                                 : 1 h 42 min
Bit rate                                 : 69.1 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0 (Type 2)
Bit depth                                : 10 bits
Bits/(Pixel*Frame)                       : 0.348
Stream size                              : 49.5 GiB (95%)

 A lot of early 4K content was 4K h.264 8-bit and 4K h.264 8-bit content will play on Intels from around Haswell onwards, as these devices had h.264 hardware acceleration that was good enough to play this.

However - real world UHD Blu-ray movies (which can now be ripped) are in 10-bit HEVC/h.265 and usually also in HDR10 format.  This is much more demanding to play - so needs a more recent playback solution - and you also have to factor in the complication of HDR output or HDR->SDR conversion. You will also see that UHD Blu-ray lossless rips can often have very high bitrates - which will also stress network connectivity if you are streaming them from a NAS or similar.

What do you mean by **mobile** format?  A format for playing on mobile phones - or something with smaller file sizes and lower bit rate (and thus lower quality)?