On Apr 23, 2008, at 1:08 PM, douglas a. welton wrote:
Bob & Randall,
If all you want to do is slap some arbitrary text over a movie, I
would suggest that you take a look at using QTMovieLayer and
CATextLayer as the mechanism for doing this. I don't have any code
that I can share with you on this, but a previous client project
used these two Core Animation objects with excellent results.
regards,
douglas
I will look into that, because my problem isn't solved yet. I wasn't
able to get my app working using the Core Video display link because
QuickTime wouldn't give me new frames when it was playing live
streaming video. However using the -view:willDisplayImage: delegate
callback... doesn't work either, for the same reason! The delegate
method works fine for video from a file, but it is _never_called_
when QuickTime is playing a live video stream. Anyone know what is
going on here? Is this some sort of DRM nonsense to prevent us from
capturing live streams?
In my case all I want to do is be able to add a scrolling text
overlay to whatever video is being played. My app is an
informational video kiosk display driver, it's meant to run mostly
unattended from playlists of images and pre-recorded video, but with
occasional scheduled live segments from streaming video cameras on
the local network. I'll take a look at Core Animation, however one
of my limitations is the app has to run under Tiger, and I thought
most of the CA stuff was new to Leopard.
Thanks to all for your help.
Bob
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