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Flickering output: Desktop Video 10.9+ and Black Burst sync #9

Open dotarmin opened 6 years ago

dotarmin commented 6 years ago

Hello!

A couple of weeks ago I experienced an issue with flickering output from Decklink cards_ when I tested a new hardware using CasparCG Server v2.2.0 Beta. After a bunch of tests and some chats with @Julusian and @ronag I finally found the issue and why the output flickered and wanted to share that information with you.

I can only confirm this when using video-mode 1080i5000 in CasparCG Server. I have also tested this by using CasparCG Server 2.0.7 Stable with same flickering results. All tests has been done using two completely different machines (see table below) to verify this issue.

The flickering seems to occur when using Black Burst-sync with Desktop Video v10.9+ and stops flickering if you use Tri-level-sync instead. However, using Desktop Video v10.8.x with Black Burst works well. Once again, I can only confirm this when using 1080i5000 and if somebody has more additional information please feel free.

Combinations: Sync-type and Desktop Video Versions

Flickering: Black Burst Flickering: Tri-level Tested on
Desktop Video v10.11 Yes No Setup 1, Setup 2
Desktop Video v10.10 Yes No Setup 1, Setup 2
Desktop Video v10.9.x Yes No Setup 1, Setup 2
Desktop Video v10.8.x No Unconfirmed Setup 1, Setup 2

Setups

Setup 1 Setup 2
Machine HP Workstation Z4 HP Workstation Z440
CPU Xeon W2135 3.7GHz 6C Xeon E5-1650V4 3.6GHz 6C
Memory 32GB 16GB
Harddrive HP Z Turbo Drive 256GB M.2 SSD Samsung 850 Pro 256GB SSD
Graphics Quadro P4000 8GB Quadro M4000 8GB
Decklink Quad2 and Duo2 Quad2 and Duo2
OS Windows 10 LTSB Windows 7 Pro
tomtailford commented 5 years ago

I'm experiencing something similar... I'm off on holiday tomorrow, however will return with some more information / behaviour to see if there is a fix. (I also came across another post where people have experienced similar and recommended downgrading driver / different sync / different power source)

tomtailford commented 5 years ago

It turned out to be a PCIe lanes thing for me... changed the slot I had my BMD card plugged into and it started working!