Douglas Kosovic doug at uq.edu.au
Sat Jan 16 05:35:37 CST 2010

Hi Jimmy,

A few people are testing the Linux version of the Blackmagic DeckLink 
VIC grabber code that's in Sumover SVN.

I've now checked in some minor mods to work with the MacOS X DeckLink 
API. Although VIC's MacOS X DeckLink grabber code is almost identical to 
the Linux version, the performance is much worse on the same machine, I 
need to investigate why.

Hit Lab NZ VIC is based on a latter version of SVN VIC's DirectShow 
grabber code that's been modified to support larger frame sizes. The SVN 
DirectShow grabber code was intentionally limited to a max resolution of 
720p (or it might even be 576p for PAL signal and 480p for NTSC) but I 
can't remember without look into the code.

I might get around to modifying VIC's native DeckLink grabber code to 
work with the Windows DecLink API one day, the API isn't too different 
from the Linux and Mac versions. The performance should hopefully also 
be better than using DirectShow.


On 01/16/2010 05:57 AM, Jimmy Miklavcic wrote:
> Last year, the HIT Lab in New Zealand was kind enough to knock an HD 
> vic for the HDMI interface. Now Nathan Gardiner has moved on and I was 
> wondering if there was anyone else there that can continue work on it. 
> One major limitation is that it will stream at a maximum of 128 Kbps. 
> That's way too low for what we need. Doesn't make much sense to use HD 
> at 128 Kbps.
> Is anyone picking up the work of Derek Piper and his AGVCR. I'm having 
> some issues where it doesn't seem to handle the HD streams and during 
> playback, I'm seeing some major artifacts and image break-up.
> If anyone is working other HD solutions I am very interested in 
> hearing about it.
> Thanks,
> Jimmy
> -- 
> Jimmy Miklavcic
> Multimedia Specialist
> Jimmy.Miklavcic at utah.edu
> 155 SOUTH 1452 EAST RM 405
> SALT LAKE CITY, UT 84112-0190
> Office: 801.585.9335
>  Fax: 801.585.5366
> http://www.anotherlanguage.org

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