Using the QTKit framework, I'm developing a little app.
In the app, I'm trying to append a movie after a other movie, which in essence is already working (most of the time), but I'm having a little trouble with the appended movie. The movie is which I'm appending to is quite big, like 1920x1080, and the appended movie is usually much smaller, but I never know what size it exactly is. The appended movie sort of stays its own size in the previous 1920x1080 frame, as seen here:
Is there anyone familiar with this? Is there a way I can scale the movie which I need to append to, to the size of the appended movie? There is no reference of such a thing in the documentation.
This is are some relevant methods:
`QTMovie *segmentTwo = [QTMovie movieWithURL:finishedMovie error:nil];
QTTimeRange range = { .time = QTZeroTime, .duration = [segmentTwo duration] };
[segmentTwo setSelection:range];
[leader appendSelectionFromMovie:segmentTwo];
while([[leader attributeForKey:QTMovieLoadStateAttribute] longValue] != 100000L)
{
//wait until QTMovieLoadStateComplete
}
NSDictionary *exportAttributes = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], QTMovieExport,
[NSNumber numberWithLong:kQTFileTypeMovie], QTMovieExportType, nil];
NSString *outputFile = [NSString stringWithFormat:#"%#.mov", onderwerp];
NSString *filepath = [[#"~/Desktop" stringByExpandingTildeInPath] stringByAppendingFormat:#"/%#", outputFile];
BOOL succes = [leader writeToFile:filepath withAttributes:exportAttributes error:&theError];
Leader is initialized like this:
NSDictionary *movieAttributes = [NSDictionary dictionaryWithObjectsAndKeys:path, QTMovieFileNameAttribute, [NSNumber numberWithBool:YES], QTMovieEditableAttribute, nil];
leader = [QTMovie movieWithAttributes: movieAttributes error:&error];
This contained all the information I need, although without using the QTKit framework. QTKit - Merge two videos with different width and height?
Related
This is suppose to play all the songs in the NSArray but it only plays one and stops. What am I doing wrong? The array contains a whole bunch of links to different .mp3 formatted songs.
NSArray *array = [myString componentsSeparatedByString:#"\n"];
int nextTag = 1;
for (soundPath in array) {
NSURL *url = [NSURL URLWithString:soundPath];
asset = [AVURLAsset URLAssetWithURL:url options:nil];
yourMediaPlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
yourMediaPlayer.controlStyle = MPMovieControlStyleNone;
yourMediaPlayer.currentPlaybackTime = 0;
yourMediaPlayer.shouldAutoplay = FALSE;
[yourMediaPlayer play];
nextTag++;
}
Instead of trying to get MPMoviePlayerController play a list of items use AVQueuePlayer instead. It has a convenient advanceToNextItem method.
You can create a player already loaded with items (class AVPlayerItem) either with initWithItems or queuePlayerWithItems. Then just call play on it (inherited from AVPlayer) and it should play the items one after the other.
See:
AVQueuePlayer docs
AVPlayer docs
AV Foundation Programming Guide
AVPlayerItem docs
I am trying to build a dictionary which has as dictionary within it (eventually I hope to convert to a JSON). The problem is I am having problems building it.
So far I have this, what it should do is build a small dictionary with keys and add it to a larger dictionary, reset and then load the small dict and then add it to the large one.
NSMutableDictionary *nestedList = [[NSMutableDictionary alloc]init];
NSMutableDictionary *nestedSections = [[NSMutableDictionary alloc] init];
[nestedList addEntriesFromDictionary:[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:46], #"menuHeight",
#"editText", #"menuMethod",
[NSNumber numberWithInt:1], #"menuOption",
nil]];
[nestedSections addEntriesFromDictionary:[NSDictionary dictionaryWithObjectsAndKeys:
nestedList, "#Basic",
nil]];
[nestedList removeAllObjects];
[nestedList addEntriesFromDictionary:[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:92], #"menuHeight",
#"sendText", #"menuMethod",
[NSNumber numberWithInt:1], #"menuOption",
nil]];
[nestedSections addEntriesFromDictionary:[NSDictionary dictionaryWithObjectsAndKeys:
nestedList, "#Pro",
nil]];
I then hoped to address like so;
NSString *string = [[nestedSections objectForKey:#"Pro"] objectForKey:#"menuMethod"];
NSLog(#"Method is : %#", string);
Log would hope to read sendText
The first dictionary builds fine but as soon as I try and add it to the second t bums out with EXC_BAD_ACCESS
I think it is a memory addressing problem because they are both mutable but I am not sure, maybe nestedList should not be mutable. Any help appreciated.
Ultimately I would like to convert this to a JSON like;
{
"Basic":
{
"menuHeight":"46",
"menuMethod":"editText",
"menuOption":"1",
},
"Pro":
{
"menuHeight":"96",
"menuMethod":"sendText",
"menuOption":"1",
}
}
A. NSMutableDictionary does not copy the values (only the keys). Therefore you add the same dictionary two times and change both (= the one) when removing objects and so on. Beside this in your sample JSON the numbers looks like strings not like numbers. I think, that this is a typo.
B. Adding modern Objective-C for better readability it should look like this:
NSDictionary *basicDictionary =
#{
#"menuHeight" : #46,
#"menuMethod" : "editText",
#"menuOption : #1
}
NSDictionary *proDictionary =
#{
#"menuHeight" : #96,
#"menuMethod" : "sendText",
#"menuOption : #1
}
NSDictionary *nestedSections = #{ #"Pro" : proDictionary, #"Basic" : basicDictionary };
I'm using NSDrawNinePartImage() to draw a stretchable control. Since this of course requires nine separate images to draw the parts (plus some extras that are drawn over that), I have a directory full of files like top-left.png and top-left#2x.png. I include this directory in my app bundle as a folder reference.
Unfortunately, the usual image-loading APIs like -[NSImage imageNamed:] and -[NSBundle imageForResource:] don't seem to support subdirectories, even if you put a slash in the name. Instead, I'm loading the images with this method:
- (NSImage*)popoverImage:(NSString*)name {
NSURL * url = [[NSBundle bundleForClass:self.class] URLForResource:name withExtension:#"png" subdirectory:#"popover"];
return [[NSImage alloc] initWithContentsOfURL:url];
}
This works fine for normal displays, but it ignores the 2x images for retina displays. How can I get it to load the retina images as well? Is there a better way than loading the two reps separately and combining them by hand? I'd rather not use TIFFs as my source files for these resources, because I use Acorn as my image editor and last time I checked, it doesn't really understand compound image formats like that very well.
The simple answer is to use TIFF's, your concern is misplaced. In Xcode set the project preference "Combine High Resolution Artwork" and continue to produce your two PNG's with Acorn as you do now. During build Xcode will combine those two PNG's into a single TIFF and store that in your bundle.
I ended up biting the bullet and combining the images manually at runtime. I did so by adding this method in a category on NSImage, and then using it in place of -initWithContentsOfURL::
- (id)initRetinaImageWithContentsOfURL:(NSURL *)url {
if((self = [self initWithContentsOfURL:url])) {
NSURL * baseURL = url.URLByDeletingLastPathComponent;
NSString * baseName = url.lastPathComponent.stringByDeletingPathExtension;
NSString * extension = url.lastPathComponent.pathExtension;
NSString * retinaBaseName = [NSString stringWithFormat:#"%##2x", baseName];
NSURL * retinaURL = [baseURL URLByAppendingPathComponent:[retinaBaseName stringByAppendingPathExtension:extension]];
if([retinaURL checkResourceIsReachableAndReturnError:NULL]) {
NSData * data = [[NSData alloc] initWithContentsOfURL:retinaURL];
NSBitmapImageRep * rep = [[NSBitmapImageRep alloc] initWithData:data];
rep.size = self.size;
[self addRepresentation:rep];
}
}
return self;
}
This is what I do:
NSArray *paths = [NSBundle.mainBundle pathsForResourcesOfType: #"icns" inDirectory: #"Collections/1"];
for (NSString *path in paths) {
NSString *fileName = [[path lastPathComponent] stringByDeletingPathExtension];
NSImage *image = [[NSImage alloc] initWithContentsOfFile: path];
image.name = fileName;
[iconCollectionController addObject: #{#"icon": image}];
}
but as CRD already pointed out you need to combine your artwork (either as tiff or icns files). But it frees you from manually selecting an image resolution (which also requires you to listen to backing store changes).
Based on a lot of online references, the way to change resolution is using the following code.
NSDictionary * pixelBufferAttr = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:320], kCVPixelBufferWidthKey,
[NSNumber numberWithInt:240], kCVPixelBufferHeightKey,
[NSNumbernumberWithBool:YES],
(id)kCVPixelBufferOpenGLCompatibilityKey,
[NSNumber
numberWithUnsignedInt:kCVPixelFormatType_422YpCbCr8],
(id)kCVPixelBufferPixelFormatTypeKey,
nil];
NSArray *outputsConnected = [mCaptureSession outputs];
QTCaptureVideoPreviewOutput * previewOutput = [outputsConnected objectAtIndex:1];
[previewOutput setDelegate:self];
[previewOutput setPixelBufferAttributes:pixelBufferAttr];
But after changing the resolution, the captureView can see the different, but using code to check the resolution is incorrect.
Does anyone know how to change the device resolution?
Thanks ALL!
I'm trying to create a QTVR movie via QTKit, and I've got all the frames in the movie. However, setting the attributes necessary doesn't seem to be having any effect. For example:
NSNumber *val = [NSNumber numberWithBool:YES];
[fMovie setAttribute:val forKey:QTMovieIsInteractiveAttribute];
val = [NSNumber numberWithBool:NO];
[fMovie setAttribute:val forKey:QTMovieIsLinearAttribute];
If I then get the value of these attributes, they come up as NO and YES, respectively. The movie is editable, so I can't understand what I'm doing wrong here. How can I ensure that the attributes will actually change?
What I do when I want to export a Quicktime movie is something like the following:
NSMutableDictionary *dictionary = [NSMutableDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], QTMovieExport,
[exportSettings objectForKey: #"subtype"], QTMovieExportType,
[exportSettings objectForKey: #"manufacturer"], QTMovieExportManufacturer,
[exportSettings objectForKey: #"settings"], QTMovieExportSettings,
nil];
BOOL didSucceed = [movie writeToFile: tmpFileName withAttributes:dictionary error: &error];
Those attributes are documented as things you can read but not write. However, you might be able to set them when you create the movie, with initWithAttributes:error:.