4K Video Settings

4K video

You can use tiled video in following drivers with appropriate card:

• decklink (eg. DeckLink Quad)
• quad (Linsys Quad)
• quicktime (eg. AJA Kona 3G, Decklink Quad) - for DeckLinks it is recommended to use decklink driver instead

quad (Linsys)

Capture

• sending tiled 4K video (quad) - use -t quad:<card_indices>: with input taken from left-top to right-bottom edge in increasing order:

uv -t quad:0,1,2,3:10  -m 8500 

DeckLink

Capture

• • general usage -t decklink:<device_index(indices)>::
  • eg. sending tiled 4K (or more exactly SuperHD), all inputs in mode "6", 8-bit YCbCr

uv -t decklink:0,1,3,4:6:UYVY -m 8500 

Display

• for receiving 4 tile arranged in 2x2 grid, you will use:

uv -d decklink:0,1,2,3 -M`` ``tiled-4K 

• Receiving native (non-tiled) 4K frames (aka captured with AJA Kona 3G) with DeckLink Quad

uv -d decklink:0,1,2,3 -p`` ``split:2:2  # and no '-M tiled-4K' (!)

Please note that the -M (mode) option needs to be entered solely on receiver. The rule of thumb is that that option simply says which arrangement is send by sender (thus tiled 4K send by DeckLink Quad needs this argument). On the other hand, video send by AJA Kona 3G is monolite 4K frame, so receiving DeckLink Quad takes '-p split:2:2'.

• native display using DeckLink 4K Extreme

uv -d decklink:0:3G

Note that quite unintuitively, the DeckLink 4K Extreme does NOT output 6G-SDI by default and requires specifying 3G option in order to do that.

Quicktime

QuickTime driver allows receiving of tiled/untiled 4K. For 4K capture capabilities, please use DeckLink Driver.

Capture

(see '-t qucktime:help' for details) AJA Kona 3G - exactly as with normal video, only select 4K/SuperHD mode:

uv -t quicktime:::<"compression"> -m 8500 

eg.

uv -t quicktime:1:1:13 -m 8500 

Display

• receiving non-tiled 4K video (AJA Kona 3G - make sure you have 4K firmware loaded):

uv -d quicktime:65549 

• receiving tiled 4K video with AJA Kona 3G

uv -M tiled-4K -d quicktime:65549 

where 65549 is QT's card index obeyed by calling uv -d quicktime:help

Note: For DeckLink card we recommend to use DeckLink API instead of QuickTime, although both work (QuickTime capture doesn't currently support tiled video).

4K SW displays - SDL, OpenGL, SAGE

uv -d sdl -M`` ``tiled-4K uv -d gl -M`` ``tiled-4K uv -d sage -M`` ``tiled-4K

If using SDL under Mac OS X, it is recommended to run binary from application bundle. This way of running UltraGrid is recommended to use everytime:

./uv.app/Contents/MacOS/uv -d sdl -M`` ``tiled-4K