I’ve purchased a new server and installed 2 decklink duo cards. I’m running 3x key/fill pairs and 2x standard channels. All are in HD 1080i50.
On the old server this ran fine. The graphics card on the old server is an RTX 2000 and ran at around 40C and 75% load.
On the new server with a RTX A4000 we’re hitting 90ºC and 90% load and the graphics are stuttering. I’m running a test page on all channels which is a simple HTML page with an animation on it.
I’ve tried both 2.4.3 and 2.5.0 and get the same results.
I do notice when I load up on the new server I see this in the output:
TBBmalloc: skip allocation functions replacement in ucrtbase.dll: unknown prologue for function _msize
and also
[warning] Device supports video-format with conversion: 1080i50
The full log is:
Environment variable ERRORLEVEL 0 not defined
TBBmalloc: skip allocation functions replacement in ucrtbase.dll: unknown prologue for function _msize
Type "q" to close application.
Logging [info] or higher severity to log/
[2026-04-15 14:44:44.926] [info] ############################################################################
[2026-04-15 14:44:44.927] [info] CasparCG Server is distributed by the Swedish Broadcasting Corporation (SVT)
[2026-04-15 14:44:44.927] [info] under the GNU General Public License GPLv3 or higher.
[2026-04-15 14:44:44.927] [info] Please see LICENSE.TXT for details.
[2026-04-15 14:44:44.927] [info] http://www.casparcg.com/
[2026-04-15 14:44:44.927] [info] ############################################################################
[2026-04-15 14:44:44.928] [info] Starting CasparCG Video and Graphics Playout Server 2.4.3 fd9168c Stable
[2026-04-15 14:44:44.929] [info] "C:/Users\Producer\Downloads\casparcg-server-v2.4.3-stable-windows\casparcg.config":
[2026-04-15 14:44:44.929] [info] -----------------------------------------
[2026-04-15 14:44:44.929] [info] <?xml version="1.0" encoding="utf-8"?>
[2026-04-15 14:44:44.929] [info] <configuration>
[2026-04-15 14:44:44.929] [info] <paths>
[2026-04-15 14:44:44.929] [info] <media-path>y:\Videos</media-path>
[2026-04-15 14:44:44.929] [info] <log-path disable="false">log/</log-path>
[2026-04-15 14:44:44.929] [info] <data-path>data/</data-path>
[2026-04-15 14:44:44.929] [info] <template-path>template/</template-path>
[2026-04-15 14:44:44.929] [info] </paths>
[2026-04-15 14:44:44.929] [info] <lock-clear-phrase>secret</lock-clear-phrase>
[2026-04-15 14:44:44.929] [info] <html>
[2026-04-15 14:44:44.929] [info] <remote-debugging-port>0</remote-debugging-port>
[2026-04-15 14:44:44.929] [info] <enable-gpu>true</enable-gpu>
[2026-04-15 14:44:44.929] [info] <angle-backend>gl</angle-backend>
[2026-04-15 14:44:44.929] [info] <enable-webgl>true</enable-webgl>
[2026-04-15 14:44:44.929] [info] <chromium-flags>--disable-software-rasterizer --ignore-gpu-blacklist --enable-gpu-rasterization</chromium-flags>
[2026-04-15 14:44:44.929] [info] </html>
[2026-04-15 14:44:44.929] [info] <channels>
[2026-04-15 14:44:44.929] [info] <channel>
[2026-04-15 14:44:44.929] [info] <video-mode>1080i5000</video-mode>
[2026-04-15 14:44:44.929] [info] <consumers>
[2026-04-15 14:44:44.929] [info] <decklink>
[2026-04-15 14:44:44.929] [info] <device>1</device>
[2026-04-15 14:44:44.929] [info] <embedded-audio>true</embedded-audio>
[2026-04-15 14:44:44.929] [info] <keyer>external</keyer>
[2026-04-15 14:44:44.929] [info] </decklink>
[2026-04-15 14:44:44.929] [info] </consumers>
[2026-04-15 14:44:44.929] [info] </channel>
[2026-04-15 14:44:44.929] [info] <channel>
[2026-04-15 14:44:44.929] [info] <video-mode>1080i5000</video-mode>
[2026-04-15 14:44:44.929] [info] <consumers>
[2026-04-15 14:44:44.929] [info] <decklink>
[2026-04-15 14:44:44.929] [info] <device>2</device>
[2026-04-15 14:44:44.929] [info] <embedded-audio>true</embedded-audio>
[2026-04-15 14:44:44.929] [info] <keyer>external</keyer>
[2026-04-15 14:44:44.929] [info] </decklink>
[2026-04-15 14:44:44.929] [info] </consumers>
[2026-04-15 14:44:44.929] [info] </channel>
[2026-04-15 14:44:44.929] [info] <channel>
[2026-04-15 14:44:44.929] [info] <video-mode>1080i5000</video-mode>
[2026-04-15 14:44:44.929] [info] <consumers>
[2026-04-15 14:44:44.929] [info] <decklink>
[2026-04-15 14:44:44.929] [info] <device>5</device>
[2026-04-15 14:44:44.929] [info] <embedded-audio>true</embedded-audio>
[2026-04-15 14:44:44.929] [info] <keyer>external</keyer>
[2026-04-15 14:44:44.929] [info] </decklink>
[2026-04-15 14:44:44.929] [info] </consumers>
[2026-04-15 14:44:44.929] [info] </channel>
[2026-04-15 14:44:44.929] [info] <channel>
[2026-04-15 14:44:44.929] [info] <video-mode>1080i5000</video-mode>
[2026-04-15 14:44:44.929] [info] <consumers>
[2026-04-15 14:44:44.929] [info] <decklink>
[2026-04-15 14:44:44.929] [info] <device>6</device>
[2026-04-15 14:44:44.929] [info] <keyer>internal</keyer>
[2026-04-15 14:44:44.929] [info] <embedded-audio>true</embedded-audio>
[2026-04-15 14:44:44.929] [info] </decklink>
[2026-04-15 14:44:44.929] [info] </consumers>
[2026-04-15 14:44:44.929] [info] </channel>
[2026-04-15 14:44:44.929] [info] <channel>
[2026-04-15 14:44:44.929] [info] <video-mode>1080i5000</video-mode>
[2026-04-15 14:44:44.929] [info] <consumers>
[2026-04-15 14:44:44.929] [info] <decklink>
[2026-04-15 14:44:44.929] [info] <device>8</device>
[2026-04-15 14:44:44.929] [info] <keyer>internal</keyer>
[2026-04-15 14:44:44.929] [info] <embedded-audio>true</embedded-audio>
[2026-04-15 14:44:44.929] [info] </decklink>
[2026-04-15 14:44:44.929] [info] </consumers>
[2026-04-15 14:44:44.929] [info] </channel>
[2026-04-15 14:44:44.929] [info] </channels>
[2026-04-15 14:44:44.929] [info] <controllers>
[2026-04-15 14:44:44.929] [info] <tcp>
[2026-04-15 14:44:44.929] [info] <port>5250</port>
[2026-04-15 14:44:44.929] [info] <protocol>AMCP</protocol>
[2026-04-15 14:44:44.929] [info] </tcp>
[2026-04-15 14:44:44.929] [info] </controllers>
[2026-04-15 14:44:44.929] [info] <amcp>
[2026-04-15 14:44:44.929] [info] <media-server>
[2026-04-15 14:44:44.929] [info] <host>localhost</host>
[2026-04-15 14:44:44.929] [info] <port>8000</port>
[2026-04-15 14:44:44.929] [info] </media-server>
[2026-04-15 14:44:44.929] [info] </amcp>
[2026-04-15 14:44:44.929] [info] <osc>
[2026-04-15 14:44:44.929] [info] <default-port>6250</default-port>
[2026-04-15 14:44:44.929] [info] <disable-send-to-amcp-clients>false</disable-send-to-amcp-clients>
[2026-04-15 14:44:44.929] [info] <predefined-clients>
[2026-04-15 14:44:44.929] [info] <predefined-client>
[2026-04-15 14:44:44.929] [info] <address>172.20.111.103</address>
[2026-04-15 14:44:44.929] [info] <port>5253</port>
[2026-04-15 14:44:44.929] [info] </predefined-client>
[2026-04-15 14:44:44.929] [info] <predefined-client>
[2026-04-15 14:44:44.929] [info] <address>172.20.111.99</address>
[2026-04-15 14:44:44.929] [info] <port>5253</port>
[2026-04-15 14:44:44.929] [info] </predefined-client>
[2026-04-15 14:44:44.929] [info] <predefined-client>
[2026-04-15 14:44:44.929] [info] <address>172.20.74.21</address>
[2026-04-15 14:44:44.929] [info] <port>5253</port>
[2026-04-15 14:44:44.929] [info] </predefined-client>
[2026-04-15 14:44:44.929] [info] </predefined-clients>
[2026-04-15 14:44:44.929] [info] </osc>
[2026-04-15 14:44:44.929] [info] </configuration>
[2026-04-15 14:44:44.929] [info] -----------------------------------------
[2026-04-15 14:44:44.929] [info] Initialized video modes.
[2026-04-15 14:44:45.444] [info] Initializing OpenGL Device.
[2026-04-15 14:44:45.455] [info] Initialized OpenGL 4.5.0 NVIDIA 581.95 NVIDIA Corporation
[2026-04-15 14:44:45.589] [info] Initialized Op[0415/144445.649:WARNING:policy_logger.cc(148)] :components\enterprise\browser\controller\chrome_browser_cloud_management_controller.cc(88) Could not create policy manager as CBCM is not enabled.
enGL Accelerated GPU Image Mixer for channel 1
[2026-04-15 14:44:45.589] [info] video_channel[1|1080i5000] Successfully Initialized.
[2026-04-15 14:44:45.590] [info] Initialized OpenGL Accelerated GPU Image Mixer for channel 2
[2026-04-15 14:44:45.590] [info] video_channel[2|1080i5000] Successfully Initialized.
[2026-04-15 14:44:45.590] [info] Initialized OpenGL Accelerated GPU Image Mixer for channel 3
[2026-04-15 14:44:45.591] [info] video_channel[3|1080i5000] Successfully Initialized.
[2026-04-15 14:44:45.591] [info] Initialized OpenGL Accelerated GPU Image Mixer for channel 4
[2026-04-15 14:44:45.591] [info] video_channel[4|1080i5000] SuccessfTBBmalloc: skip allocation functions replacement in ucrtbase.dll: unknown prologue for function _msize
ully Initialized.
[2026-04-15 14:44:45.592] [info] Initialized OpenGL Accelerated GPU Image Mixer for channel 5
[2026-04-15 14:44:45.592] [info] video_channel[5|1080i5000] Successfully Initialized.
[2026-04-15 14:44:45.592] [info] Initialized channels.
[2026-04-15 14:44:45.592] [info] Initialized command repository.
[2026-04-15 14:44:45.593] [info] Initialized image module.
[2026-04-15 14:44:45.593] [info] Initialized ffmpeg module.
[2026-04-15 14:44:45.593] [info] Initialized oal module.
[2026-04-15 14:44:45.593] [info] Initialized decklink module.
[2026-04-15 14:44:45.593] [info] Initialized screen module.
[2026-04-15 14:44:45.593] [info] Initialized newtek module.
[2026-04-15 14:44:45.593] [info] Initialized artnet module.
[2026-04-15 14:44:45.675] [info] Initialized html module.
[2026-04-15 14:44:45.675] [info] Flash support is disabled
[2026-04-15 14:44:45.675] [info] Initialized flash module.
[2026-04-15 14:44:45.677] [info] Initialized bluefish module.
[2026-04-15 14:44:45.677] [info] Initialized modules.
[2026-04-15 14:44:45.703] [warning] Device supports video-format with conversion: 1080i50
[2026-04-15 14:44:45.704] [info] DeckLink Duo 2 [1-1|1080i5000] Enabled embedded-audio.
[2026-04-15 14:44:45.704] [info] DeckLink Duo 2 [1-1|1080i5000] Disabled low-latency mode.
[2026-04-15 14:44:45.704] [info] DeckLink Duo 2 [1-1|1080i5000] Enabled external keyer.
[2026-04-15 14:44:45.714] [info] DeckLink Duo 2 [1-1|1080i5000] Initialized.
[2026-04-15 14:44:45.730] [warning] Device supports video-format with conversion: 1080i50
[2026-04-15 14:44:45.731] [info] DeckLink Duo 2 [2-2|1080i5000] Enabled embedded-audio.
[2026-04-15 14:44:45.731] [info] DeckLink Duo 2 [2-2|1080i5000] Disabled low-latency mode.
[2026-04-15 14:44:45.731] [info] DeckLink Duo 2 [2-2|1080i5000] Enabled external keyer.
[2026-04-15 14:44:45.740] [info] DeckLink Duo 2 [2-2|1080i5000] Initialized.
[2026-04-15 14:44:45.773] [warning] Device supports video-format with conversion: 1080i50
[2026-04-15 14:44:45.774] [info] DeckLink Duo 2 [3-5|1080i5000] Enabled embedded-audio.
[2026-04-15 14:44:45.774] [info] DeckLink Duo 2 [3-5|1080i5000] Disabled low-latency mode.
[2026-04-15 14:44:45.774] [info] DeckLink Duo 2 [3-5|1080i5000] Enabled external keyer.
[2026-04-15 14:44:45.784] [info] DeckLink Duo 2 [3-5|1080i5000] Initialized.
[2026-04-15 14:44:45.813] [info] DeckLink Duo 2 [1-1|1080i5000] Reference signal: not detected.
[2026-04-15 14:44:45.815] [info] DeckLink Duo 2 [2-2|1080i5000] Reference signal: not detected.
[2026-04-15 14:44:45.823] [warning] Device supports video-format with conversion: 1080i50
[2026-04-15 14:44:45.825] [info] DeckLink Duo 2 [4-6|1080i5000] Enabled embedded-audio.
[2026-04-15 14:44:45.825] [info] DeckLink Duo 2 [4-6|1080i5000] Disabled low-latency mode.
[2026-04-15 14:44:45.825] [error] DeckLink Duo 2 [4-6|1080i5000] Failed to enable internal keyer.
[2026-04-15 14:44:45.835] [info] DeckLink Duo 2 [4-6|1080i5000] Initialized.
[2026-04-15 14:44:45.880] [info] DeckLink Duo 2 [3-5|1080i5000] Reference signal: not detected.
[2026-04-15 14:44:45.886] [warning] Device supports video-format with conversion: 1080i50
[2026-04-15 14:44:45.887] [info] DeckLink Duo 2 [5-8|1080i5000] Enabled embedded-audio.
[2026-04-15 14:44:45.887] [info] DeckLink Duo 2 [5-8|1080i5000] Disabled low-latency mode.
[2026-04-15 14:44:45.887] [error] DeckLink Duo 2 [5-8|1080i5000] Failed to enable internal keyer.
[2026-04-15 14:44:45.895] [info] DeckLink Duo 2 [5-8|1080i5000] Initialized.
[2026-04-15 14:44:45.895] [info] Initialized startup producers.
[2026-04-15 14:44:45.897] [info] Initialized controllers.
[2026-04-15 14:44:45.897] [info] Initialized osc.
[2026-04-15 14:44:45.920] [info] DeckLink Duo 2 [4-6|1080i5000] Reference signal: not detected.
[2026-04-15 14:44:45.984] [info] DeckLink Duo 2 [5-8|1080i5000] Reference signal: not detected.
TBBmalloc: skip allocation functions replacement in ucrtbase.dll: unknown prologue for function _msize
Any suggestions on what I can do to diagnose this please? The new box is unusable at present.