displaying an image sequence at high framerates
displaying an image sequence at high framerates
- Subject: displaying an image sequence at high framerates
- From: Andrew Garber <email@hidden>
- Date: Mon, 26 May 2003 00:39:07 -0700
I want to write an app which displays a sequence of images (eg. 001.jpg
- 200.jpg) in a custom view (subclass of NSView) around 30 frames per
second. What's the best way to do this?
- I have no other programming experience other than writing Cocoa apps,
and a few simple C++ command-line programs (I don't know Carbon)
- The documentation for the QuickTime API scares me! (It looks much
harder to learn than Cocoa)
- I tried using Quartz 2D, with calls like CGContextDrawImage(), but it
runs WAY slower than playing an image sequence in QuickTime Player. I
didn't create buffer of CGImageRefs (I just read each image in when it
needed to be displayed using CGDataProviderCreateWithURL and
CGImageCreateWithJPEGDataProvider). Should I have? Would that help
much? If so, how would I create such a buffer?
- What about Quartz Compositor or OpenGL? Could I use those
technologies? (I know next to nothing about them currently)
- If QuickTime is the only way to go, is there an EASY way to use it in
a cocoa app? Does anyone have any simple, well comented sample code to
get me started? (I've spent hours reading through Apple's sample code
and I still can't make head or tails of it)
ANY suggestion would be highly appreciated :)
Thanks,
Andrew
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