Viewing on Ext. Monitor

[Kevin Camp]

i have a mac pro and an sd decklink card, and when realtime playback issues i try setting the output quality in the preview settings from more accurate to faster and it usually helps. i assume you have a similar setting for your hardware since it is an ae preference.

for instance, i can work in the hdv 720 preset if the frame rate is 29.97 and have no issues with realtime playback to the sd broadcast monitor, but if i up the frame rate to 59.94, i can’t get realtime playback without setting the output quality to faster.

i remember having similar problems with sd widescreen comps too, i can’t remember what my magic formula was for getting those to work, it may have only been a problem working with the sd widescreen square pixel comp, but changing that to an anamorphic comp setting helped, or maybe it was just the output quality setting…

Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW

[David Coiffier]

Hi Justin,

You’re doing nothing wrong. The jitter is from the way comp picture is sent to the Kona3.
At every frame, when ram previewing, AE sends a picture to the video board. This is not a movie file that it sent, but a single frame…every frame. This is something like trying to drive fast, but with a need to stop every 10 meters…Sending pictures the Kona board just breaks up the ram preview, causing sluggish frame rate.

The preview option is more something like a handy feature, when color timing, or anything that doesn’t require real time. Use Kona preview only when needed, or if you prefer : turn it off when you need real time preview.

[Justin Skotarczyk]

David,

Thank you for that explanation. That makes much more sense to me!

Justin Skotarczyk
Designer/VFX Artist
Mosa
Royal Oak, MI