Table of Contents
UHD HD Switch
Jun 2021
Updated Jan 2024
Introduction
At the time of writing, the CE1 only operates in either HD or UHD mode (variant 1 and variant 2, don't ask me what variant 3 is).
So if the unit is set to UHD mode, you cannot do a HD encode (white lie, you can but the M1 CPU tries to upscale HD to UHD and you run out of CPU).
So to change mode you have to edit a file and then reboot the unit. This should be addressed around August 2021.
Changing Mode (variant)
To change variant we need to edit one file on the CE1. This file is located at:
/var/opt/mediakind/platform/ The file is called dta_2174b_variant_force
You can either edit this file in vi, and change the parameter to be either a 1 (for HD) or a 2 (for UHD). After editing you need to reboot the unit.
A slightly quicker way to edit this file is to use the following command:
echo 2 > /var/opt/mediakind/platform/dta_2174b_variant_force
After 'echo' type a 1 or 2 depending on whether you want HD (1) or UHD (2) then reboot.
Multiple SDI Cards
If you have multiple SDI cards (say in EL G9 where you could have 3 cards) you can use the following:
Navigate to the following directory:
/var/opt/mediakind/platform
There should be a file here called:
dta_217x_platform
rename this file or you won't be able to create the relevant directory:
mv dta_217x_platform dta_217x_platform.org
Now you can create the following directory (ensure you are in /var/opt/mediakind/platform)
mkdir dta_217x_variant
Navigate to /var/opt/mediakind/platform/dta_217x_variant
cd /var/opt/mediakind/platform/dta_217x_variant
To set the card variant type we need to assign a number for that card mode, lets assume we want card 1 in HD mode (variant 1) and card 2 in UHD mode (variant 2):
echo 1 > /var/opt/mediakind/platform/dta_217x_variant/1 echo 2 > /var/opt/mediakind/platform/dta_217x_variant/2
This file is read at boot, so for the configuration to apply you need to reboot the unit.
Variant Modes
• Variant 1: HD SDI input (each input is up to 3G-SDI) • Variant 2: 1 UHD channel over 4x3G-SDI on ports 1,2,3 and 4 with DTA-2174B 1 UHD channel over 4x3G-SDI on ports 1-4 or 5-8 with DTA-2178