Смешивайте видео со статическим изображением в CALayer с помощью AVVideoCompositionCoreAnimationTool
Я пытаюсь смешивать видео, идущее с камеры со статическим изображением (водяной знак).
Я проверил вопросы/ответы здесь и некоторые примеры, включая WWDC AVEditDemo от Apple, и закончился следующим кодом.
К сожалению, экспортированное видео не содержит слой с изображением.
Любые идеи?
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
/// incoming video
NSURL *videoURL = [info valueForKey:UIImagePickerControllerMediaURL];
/// UIImage into CALayer
UIImage *myImage = [UIImage imageNamed:@"m1h.png"];
CALayer *aLayer = [CALayer layer];
aLayer.contents = (id)myImage.CGImage;
AVURLAsset* url = [AVURLAsset URLAssetWithURL:videoURL options:nil];
AVMutableComposition *videoComposition = [AVMutableComposition composition];
NSError *error;
NSFileManager *fileManager = [NSFileManager defaultManager];
AVMutableCompositionTrack *compositionVideoTrack = [videoComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
AVAssetTrack *clipVideoTrack = [[url tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
[compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, [url duration]) ofTrack:clipVideoTrack atTime:kCMTimeZero error:&error];
AVMutableVideoComposition* videoComp = [[AVMutableVideoComposition videoComposition] retain];
videoComp.renderSize = CGSizeMake(640, 480);
videoComp.frameDuration = CMTimeMake(1, 30);
videoComp.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithAdditionalLayer:aLayer asTrackID:2];
/// instruction
AVMutableVideoCompositionInstruction *instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
instruction.timeRange = CMTimeRangeMake(kCMTimeZero, CMTimeMakeWithSeconds(60, 30) );
AVMutableVideoCompositionLayerInstruction* layerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:clipVideoTrack];
instruction.layerInstructions = [NSArray arrayWithObject:layerInstruction];
videoComp.instructions = [NSArray arrayWithObject: instruction];
/// outputs
NSString *filePath = nil;
filePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
filePath = [filePath stringByAppendingPathComponent:@"temp.mov"];
NSLog(@"exporting to: %@", filePath);
if ([fileManager fileExistsAtPath:filePath])
{
BOOL success = [fileManager removeItemAtPath:filePath error:&error];
if (!success) NSLog(@"FM error: %@", [error localizedDescription]);
}
/// exporting
AVAssetExportSession *exporter;
exporter = [[AVAssetExportSession alloc] initWithAsset:videoComposition presetName:AVAssetExportPresetHighestQuality] ;
exporter.videoComposition = videoComp;
exporter.outputURL=[NSURL fileURLWithPath:filePath];
exporter.outputFileType=AVFileTypeQuickTimeMovie;
[statusLabel setText:@"processing..."];
[exporter exportAsynchronouslyWithCompletionHandler:^(void){
switch (exporter.status) {
case AVAssetExportSessionStatusFailed:
NSLog(@"exporting failed");
break;
case AVAssetExportSessionStatusCompleted:
NSLog(@"exporting completed");
UISaveVideoAtPathToSavedPhotosAlbum(filePath, self, @selector(video:didFinishSavingWithError:contextInfo:), NULL);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"export cancelled");
break;
}
}];
}
Ответы
Ответ 1
После игры я закончил с чем-то подобным в дополнение к вышеуказанному коду, также изменив использованный метод на videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:
CALayer *parentLayer = [CALayer layer];
CALayer *videoLayer = [CALayer layer];
parentLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
videoLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
[parentLayer addSublayer:videoLayer];
[parentLayer addSublayer:aLayer];
videoComp.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];
Надеюсь, это поможет кому-то.
Ответ 2
У меня это получилось! это код! я не писал большую часть этого, я просто подправил некоторые, но единственная проблема заключается в том, что само видео поворачивается для пейзажа в портретном режиме? а затем в пейзаже его портретное видео, но изображение справа вверх!
CALayer *aLayer = [CALayer layer];
aLayer.frame = CGRectMake(5, 0, 320, 480);
aLayer.bounds = CGRectMake(5, 0, 320, 480);
aLayer.contents = (id) [UIImage imageNamed:@"image.png"].CGImage;
aLayer.opacity = 0.5;
aLayer.backgroundColor = [UIColor clearColor].CGColor;
NSURL *url = [NSURL fileURLWithPath:[urlsOfVideos objectAtIndex:self.pageControl.currentPage]];
AVURLAsset *asset = [AVURLAsset URLAssetWithURL:url options:nil];
cmp = [AVMutableComposition composition];
AVMutableCompositionTrack *trackA = [cmp addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
AVAssetTrack *sourceVideoTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
[trackA insertTimeRange:CMTimeRangeMake(kCMTimeZero, [asset duration]) ofTrack:sourceVideoTrack atTime:kCMTimeZero error:nil] ;
animComp = [AVMutableVideoComposition videoComposition];
animComp.renderSize = CGSizeMake(320, 480);
animComp.frameDuration = CMTimeMake(1,30);
CALayer *parentLayer = [CALayer layer];
CALayer *videoLayer = [CALayer layer];
parentLayer.frame = CGRectMake(0, 0, 320, 480);
videoLayer.frame = CGRectMake(0, 0, 320, 480);
[parentLayer addSublayer:videoLayer];
[parentLayer addSublayer:aLayer];
animComp.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];
AVMutableVideoCompositionInstruction *instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
instruction.timeRange = CMTimeRangeMake(kCMTimeZero, [asset duration]);
AVMutableVideoCompositionLayerInstruction *layerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:trackA];
//[layerInstruction setTrackID:2];
[layerInstruction setOpacity:1.0 atTime:kCMTimeZero];
instruction.layerInstructions = [NSArray arrayWithObject:layerInstruction] ;
animComp.instructions = [NSArray arrayWithObject:instruction];
[self exportMovie:self];
и вот код экспорта
-(IBAction) exportMovie:(id)sender{
NSArray *docPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *tempPath = [docPaths objectAtIndex:0];
NSLog(@"Temp Path: %@",tempPath);
NSString *fileName = [NSString stringWithFormat:@"%@/output-anot.MOV",tempPath];
NSFileManager *fileManager = [NSFileManager defaultManager] ;
if([fileManager fileExistsAtPath:fileName ]){
//NSError *ferror = nil ;
//BOOL success = [fileManager removeItemAtPath:fileName error:&ferror];
}
NSURL *exportURL = [NSURL fileURLWithPath:fileName];
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:cmp presetName:AVAssetExportPresetHighestQuality] ;
exporter.outputURL = exportURL;
exporter.videoComposition = animComp;
exporter.outputFileType= AVFileTypeQuickTimeMovie;
[exporter exportAsynchronouslyWithCompletionHandler:^(void){
switch (exporter.status) {
case AVAssetExportSessionStatusFailed:{
NSLog(@"Fail");
break;
}
case AVAssetExportSessionStatusCompleted:{
NSLog(@"Success");
break;
}
default:
break;
}
}];
}