QTMovie exception exception index when trying to addImage: forDuration: withAttributes

I am trying to create a movie in Cocoa using QTKit. This movie should consist of the NSImage group that I created. I have problems with this. A common problem is that the movie is not created. I get a file that seems empty, contains only a couple of hundred bytes, but not a movie that could be talked about. Anyway, the code:

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    NSLog(@"Creating .mov out of NSImage(s)");

    NSError *error = nil;

    // Create empty QTMovie with writable data reference
    QTMovie *movie = [[QTMovie alloc] initToWritableFile:@"Temp.mov" error:&error];

    // If an error occurred, print it
    if ( error )
        NSLog(@"Error creating movie: %@", [error localizedDescription]);

    // Sanity-check to see that our movie is writable
    assert([[movie attributeForKey:QTMovieEditableAttribute] boolValue] == YES);

    // Load our image
    NSImage *image = [NSImage imageNamed:@"screen-1"];

    // Check that our image is loaded
    assert(image != nil);

    // Add the image to our movie, duration is 6000 / 600 = 10 seconds?
    NSDictionary *attributesForImage = [NSDictionary dictionaryWithObjectsAndKeys:@"tiff", QTAddImageCodecType, nil];
    [movie addImage:image forDuration:QTMakeTime(6000, 600) withAttributes:attributesForImage];

    // Store our movie in a file called "Done.mov"
    // flattening it seems like a good idea
    NSDictionary *attributesForExport = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES],
                                QTMovieFlatten, nil];
    error = nil;
    BOOL didSucceed = [movie writeToFile:@"Done.mov" withAttributes:attributesForExport error:&error];

    if ( ! didSucceed || error )
        NSLog(@"Did not succeed. Error was: %@", [error localizedDescription]);
    else
    {
        // If we did succeed, error should be nil, right?
        assert(error == nil);

        NSLog(@"Did succeed.");
    }

    // Cleanup
    [movie release];
    [[NSFileManager defaultManager] removeItemAtPath:@"Temp.mov" error:nil];
    [NSApp terminate:nil];
}

The line to be followed is [movie addImage.... An error occurs here. I get the following exception:

eException', reason: '*** -[NSArray objectAtIndex:]: index (0) beyond bounds (0)'
*** Call stack at first throw:
(
0   CoreFoundation                      0x90e806ba __raiseError + 410
1   libobjc.A.dylib                     0x97cde509 objc_exception_throw + 56
2   CoreFoundation                      0x90ec5321 -[__NSArray0 objectAtIndex:] + 209
3   QTKit                               0x9387492c -[QTMovie_QuickTime addImage:forDuration:atTime:withAttributes:] + 708
4   QTKitServer                         0x000208ba do_addImageAtTimeWithAttributes + 327
5   QTKitServer                         0x0000cb03 _XaddImageAtTimeWithAttributes + 291
6   QTKitServer                         0x000021bb QTKitServer_server + 113
7   QTKitServer                         0x0001e194 mach_port_callback + 84
8   CoreFoundation                      0x90dee772 __CFMachPortPerform + 338
9   CoreFoundation                      0x90dea4db __CFRunLoopRun + 6523
10  CoreFoundation                      0x90de8464 CFRunLoopRunSpecific + 452
11  CoreFoundation                      0x90dee3a4 CFRunLoopRun + 84
12  QTKitServer                         0x0001e702 main + 1068
13  QTKitServer                         0x00002141 start + 53
)

I googled a lot and found nothing that really answers this question. The code is pretty simple, it looks exactly like most code samples. The image loads fine, but it doesn't add at all. Any ideas? This is a JPEG image, if relevant.