AVVideoCompositionCoreAnimationTool을 사용하여 CALayer에서 정적 이미지가있는 비디오를 믹스하십시오.

Question

정적 이미지 (워터 마킹)로 카메라에서 오는 비디오를 믹싱하려고합니다.

Apple의 WWDC AVEditDemo를 포함하여 여기에서 몇 가지 질문/답변을 확인하고 다음 코드로 끝납니다. 내 보낸 비디오에 이미지가있는 레이어가 포함되어 있지 않습니다. 아이디어가 있으십니까?

- (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; 
    } 
}]; 

}

Answer 1

장난 후 나는 또한 videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer에 사용되는 방법을 변경, 위의 코드에 또한이 같은 뭔가 결국 :

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]; 

은 누군가가 도움이되기를 바랍니다.

Answer 2

나는 이것을 작동 시켰습니다! 코드를 heres! 나는 그것의 대부분을 쓰지 않았다, 나는 단지 약간을 비틀었다. 그러나 유일한 이슈는 비디오 자체가 초상화 모드의 풍경을 위해 회전된다? 그런 다음 가로 방향의 인물 사진으로 표시되지만 이미지가 오른쪽면에 있습니다. 여기

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]; 

및

는 내보내기 코드

-(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; 
    } 
}]; 

}