Re: How to access to clip format description from QuickTime API?
Re: How to access to clip format description from QuickTime API?
- Subject: Re: How to access to clip format description from QuickTime API?
- From: Robert Martin <email@hidden>
- Date: Mon, 25 Sep 2006 16:28:34 -0400
This really is not an XCode issue - the Quicktime list is the right
place for this question.
However, you might try something along the lines of:
//----------------------------------------------------------------------
-
-(NSDictionary*) vidAttributes
//----------------------------------------------------------------------
-
{
NSMutableDictionary * attr = [NSMutableDictionary dictionary];
NSString * str = nil;
OSErr anErr = noErr;
Media aMedia = NULL;
OSType aMediaType;
aMedia = [self firstVideoMedia]; // assuming you have a method to
get this
GetMediaHandlerDescription(aMedia, &aMediaType, 0, 0);
SampleDescriptionHandle anImageDesc = NULL;
anImageDesc = (SampleDescriptionHandle)NewHandle(sizeof
(SampleDescription));
GetMediaSampleDescription(aMedia, 1, anImageDesc);
anErr = GetMoviesError();
if(anErr != noErr)
{
DisposeHandle((Handle)anImageDesc);
return nil;
}
// look in the docs for the complete list of attributes you can query...
// this will give you the name - ie: Sorensen 3 or whatever...
// stringWithPString is just a string category I use
str = [NSString stringWithPString:(*(ImageDescriptionHandle)
anImageDesc)->name ];
[attr setObject:str forKey:@"codec"];
DisposeHandle((Handle)anImageDesc);
return attr;
}
On Sep 25, 2006, at 3:43 PM, Raul wrote:
Thanks for your info.
I get the movie track with QTMovie tracksOfMediaType:QTMediaTypeVideo.
And also get QTMedia but i don't know what to do with
GetMediaSampleDescription() to get Video Codec Format Description.
I search in google , but only find one example in C and i am
programing in Objective-C.
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