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Deltacast, adding Extra buffers = no video out?

Please report bugs in this group. We will maybe populate a list of known bugs with a possibly modified description at a later time.

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SamTheSwede
Posts: 91
Joined: 18 Jan 2012, 11:31

Deltacast, adding Extra buffers = no video out?

Post by SamTheSwede » 12 Feb 2015, 14:52

For some reason I get no video out if I enable a couple of extra buffers (4) in the configuration editor.

This is true if I have software watchdog enabled or not.

As this is a new machine, I haven't used the same settings in any earlier version, but the settings seems the same as I have in earlier versions.

DetltaCast HD KEY 2-2
HD 1080i50
Internal SW keyer
Ventuz V4.06.01.35 R10166
DeltaCast Driver as delivered with Ventuz 4.06.01

Can you reproduce on your end, or is there something with my HW or drivers that is corrupt?

All the best,

Sam

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Dierk Ohlerich
Posts: 74
Joined: 10 Jul 2012, 09:01
Location: Hamburg, Germany

Re: Deltacast, adding Extra buffers = no video out?

Post by Dierk Ohlerich » 13 Feb 2015, 10:11

A new machine? Check if you set the "memory preallocation"! That's a couple of registry keys that make the Deltacast board allocate large amounts of continuous memory during the boot sequence. With the default amount of buffers this makes no big difference, but with lot's of extra buffers the board may fail to allocate enough continuous physical memory after the boot has completed.

* go to Ventuz Help
* navigate "Introduction to the Video Engine"
* Scroll down to the bottom of the page, click see also : "Supported Hardware"
* Search the phrase "prealloc"

There is a better explanation explanation.

For short, set the following registry keys:
----
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\DELTA-hd]
"PreallocPool0Size"=dword:03000000
"PreallocPool1Size"=dword:03000000
----
This requires a reboot to work. To check if the settings were applied correctly, press the little 'i' button over the Deltacast icon in the av config.
-- Dierk Ohlerich

SamTheSwede
Posts: 91
Joined: 18 Jan 2012, 11:31

Re: Deltacast, adding Extra buffers = no video out?

Post by SamTheSwede » 13 Feb 2015, 12:53

Hi Dierk!

I've already done the Preallocation trick for Pool0 - Pool3, this doesn't help I'm affraid.

CAN it be something with the latest DeltaCast drivers that cause this?

I have been cranking up the buffers to 10 in previous versions to be on the safe side, but never with these DeltaCast drivers....

// Sam

SamTheSwede
Posts: 91
Joined: 18 Jan 2012, 11:31

Re: Deltacast, adding Extra buffers = no video out?

Post by SamTheSwede » 13 Feb 2015, 13:05

And for the sake of debugging..... -Wien adding 4 buffers to my Internal SW Keying config, I get the message "Error deltacast vidopipe\deltacast.cpp(2574) error 24 (0x18)" on multiple lines in my messagewindow.

SamTheSwede
Posts: 91
Joined: 18 Jan 2012, 11:31

Re: Deltacast, adding Extra buffers = no video out?

Post by SamTheSwede » 13 Feb 2015, 13:25

Please don't filter my posts as spam.... ;-)

I doubled the memory allocation per pool to 96 MB (06000000) and after reboot I can use 4 buffers in the config!

All the best,

Sam,

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