我将这里找到的2个代码块合并为一个实体块(并使用Apple Developer Xcode教程文件验证了该过程).但是,当我运行它时,我收到一个错误.它说:
错误域= AVFoundationErrorDomain代码= -11841"操作无法完成.(AVFoundationErrorDomain error -11841.)"
知道它为什么抛出AVErrorInvalidVideoComposition错误吗？谢谢!(我是新来的,如果您需要更多信息,请告诉我.)
NSURL *videoURL = [info valueForKey:UIImagePickerControllerMediaURL];
/// UIImage into CALayer
UIImage *myImage = [UIImage imageNamed:@"Test.png"];
CALayer *aLayer = [CALayer layer];
aLayer.contents = (id)myImage.CGImage;
AVURLAsset* url = [AVURLAsset URLAssetWithURL:videoURL options:nil];
AVMutableComposition *videoComposition = [[AVMutableComposition alloc] init];
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 alloc] init];
videoComp.renderSize = CGSizeMake(640, …