嵌套AVMutableComposition

Question

我试图在嵌套层次结构中使用AVMutableComposition。为此，我必须把一篇作文放进另一篇作文里。这样做会产生以下错误消息：

AVCompostionTest45347:10703 comp2 >>>操作无法完成

我使用了下面的代码片段。

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]);
}

可以嵌套构图吗？

Answer 1

不可能嵌套AVMutableComposition资产。