如何附加两个音频文件？

Question

我想在iPhone中附加两个音频文件.请帮我这样做.

Answer 1

我得到了解决方案; 以下是执行此操作的示例代码.

AVMutableComposition* composition = [AVMutableComposition composition];
AVURLAsset* audioAsset1 = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:filePath1] options:nil];
AVURLAsset* audioAsset2 = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:filePath2] options:nil];

AVMutableCompositionTrack *audioTrack1 = [composition addMutableTrackWithMediaType:AVMediaTypeAudio 
                                                                      preferredTrackID:kCMPersistentTrackID_Invalid];

[audioTrack1 insertTimeRange:CMTimeRangeMake(kCMTimeZero, audioAsset1.duration)
                         ofTrack:[[audioAsset1 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]
                          atTime:kCMTimeZero
                           error:&error];
[audioTrack1 insertTimeRange:CMTimeRangeMake(kCMTimeZero, audioAsset2.duration) 
                         ofTrack:[[audioAsset2 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] 
                          atTime:audioAsset1.duration
                           error:&error];

最后,我们必须使用它将其导出为单个文件AVAssetExportSession.

注意:它仅适用于.m4a文件