我正在尝试在嵌套层次结构中使用 AVMutableComposition。因此,我必须将一个作品放入另一个作品中。这样做会导致以下错误消息:
AVCompositionTest[45347:10703] comp2 >>> 操作无法完成
我使用以下代码剪断。
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?