使用AVVideoCompositionCoreAnimationTool在CALayer中将静态图像与静态图像混合使用
我试图将来自相机的视频与静态图像(水印)混合使用。使用AVVideoCompositionCoreAnimationTool在CALayer中将静态图像与静态图像混合使用
我已经检查过这里的问题和答案以及一些例子,包括来自Apple的WWDC AVEditDemo,并以下面的代码结束。 不幸的是,导出的视频不包含图像的图层。 任何想法?
- (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;
}
}];
}
玩弄后,我结束了在除了上面的代码这样的事情,也改变了使用的方法来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];
希望它可以帮助别人。
我得到了这个工作!继承人的代码!我没有写大部分内容,我只是调整了一些,但唯一的问题是视频本身是否在纵向模式下旋转为横向模式?然后在它的肖像视频的横向,但图像是正确的一面!
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];
这里是出口代码
-(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;
}
}];
}
不应该你的形象是tits.png? – 2014-02-18 11:12:08
@NicolasManzini不,苹果文件中说它boobs.png – NSGodMode 2016-04-04 23:15:51
LMFAO。我的错。这段代码被用在我为一家公司工作的项目中,我只是复制/粘贴它而不检查内容。天啊。 – Maximilian 2016-04-06 23:14:38
我有一个类似的问题(见[这里](http://*.com/questions/6749216/how- to-properly-export-calayer-on-top-of-avmutablecomposition-with-avassetexports)),但是出了点问题。你认为你能帮助我吗? – 2011-07-19 14:57:49