这是解决这个问题的完整代码,它有两个视频,它们与他们的音频相结合:-
AVURLAsset* video1 = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:path1] options:nil];
AVURLAsset* video2 = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:path2] options:nil];
if (video1 !=nil && video2!=nil) {
// 1 - Create AVMutableComposition object. This object will hold your AVMutableCompositionTrack instances.
AVMutableComposition *mixComposition = [[AVMutableComposition alloc] init];
// 2 - Video track
AVMutableCompositionTrack *firstTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
AVMutableCompositionTrack *firstTrackAudio = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio
preferredTrackID:kCMPersistentTrackID_Invalid];
[firstTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, video1.duration)
ofTrack:[[video1 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:kCMTimeZero error:nil];
[firstTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, video2.duration)
ofTrack:[[video2 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:video1.duration error:nil];
// 它有一个音轨
if ([[video1 tracksWithMediaType:AVMediaTypeAudio] count] > 0)
{
AVAssetTrack *clipAudioTrack = [[video1 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[firstTrackAudio insertTimeRange:CMTimeRangeMake(kCMTimeZero, video1.duration) ofTrack:clipAudioTrack atTime:kCMTimeZero error:nil];
}
// 它有一个音轨
if ([[video2 tracksWithMediaType:AVMediaTypeAudio] count] > 0)
{
AVAssetTrack *clipAudioTrack = [[video2 tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[firstTrackAudio insertTimeRange:CMTimeRangeMake(kCMTimeZero, video2.duration) ofTrack:clipAudioTrack atTime:video1.duration error:nil];
}
// 导出会话
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition
presetName:AVAssetExportPresetHighestQuality];
//Creates the path to export to - Saving to temporary directory
NSString* filename = [NSString stringWithFormat:@"Video_%d.mov",arc4random() % 1000];
NSString* path = [NSTemporaryDirectory() stringByAppendingPathComponent:filename];
//Checks if there is already a file at the output URL.
if ([[NSFileManager defaultManager] fileExistsAtPath:path])
{
NSLog(@"Removing item at path: %@", path);
[[NSFileManager defaultManager] removeItemAtPath:path error:nil];
}
exporter.outputURL = [NSURL fileURLWithPath:path];
//Set the output file type
exporter.outputFileType = AVFileTypeQuickTimeMovie;
path3=path;
[arr_StoredDocumentoryUrls addObject:path3];
//Exports!
[exporter exportAsynchronouslyWithCompletionHandler:^{
switch (exporter.status) {
case AVAssetExportSessionStatusCompleted:{
NSLog(@"Export Complete");
break;
}
case AVAssetExportSessionStatusFailed:
NSLog(@"Export Error: %@", [exporter.error description]);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Export Cancelled");
break;
default:
break;
}
}];
}