我正试图在嵌套层次结构中使用AVMutableComposition。因此,我必须将一个composition放入另一个composition中。这样做会导致以下错误消息:
AVCompositionTest [45347:10703] comp2 >>> 操作无法完成
我使用了以下代码片段。
AVAsset *audioAsset = [AVAsset assetWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"02 Undefined" ofType:@"mp3"]]];
AVMutableComposition *comp1 = [AVMutableComposition composition];
BOOL success = YES;
NSError *error = nil;
success = [comp1 insertTimeRange:CMTimeRangeMake(kCMTimeZero, audioAsset.duration)
ofAsset:audioAsset
atTime:kCMTimeZero
error:&error];
if (!success) {
NSLog(@"comp1 >>> %@", [error localizedDescription]);
}
AVMutableComposition *comp2 = [AVMutableComposition composition];
success = [comp2 insertTimeRange:CMTimeRangeMake(kCMTimeZero, audioAsset.duration)
ofAsset:comp1
atTime:kCMTimeZero
error:&error];
if (!success) {
NSLog(@"comp2 >>> %@", [error localizedDescription]);
}
是否可以嵌套组合?