Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Field Information

François,
I need to know if the video data I receive from quicktime is interlaced or progressive. Currently I am playing the movie by setting the position in the movie and telling him to play the movie with MoviesTask and receiving the data in an offscreen GWorld in YUYV422 format, does QuickTime always render the movie in progressive or it depends on the movie file? If so, is there a way to get the information from the movie?
Here's a code snippet to determine whether the video is marked as interlaced or progressive. Unfortunately, a lot of video is unspecified, so may have to let the user supply this information.

Handle lFieldInfoExtension = nil;
OSErr lError = GetImageDescriptionExtension(lImageDescription, &lFieldInfoExtension, kFieldInfoImageDescriptionExtension, 1);
if (!lError){
if ((**(FieldInfoImageDescriptionExtension2**) lFieldInfoExtension).fields==kQTFieldsInterlaced){
//It's interlaced.
} else {
//It's progressive.
}
DisposeHandle(lFieldInfoExtension);
} else {
//It's unspecified.
}


Andreas Wittenstein
BitJazz Inc.
http://www.bitjazz.com/

_______________________________________________
Do not post admin requests to the list. They will be ignored.
QuickTime-API mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quicktime-api/email@hidden

This email sent to email@hidden
References: 
 >(no subject) (From: François Dagenais <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.