1	//暂停预览
2	[self.previewer pausePreview];
3
4    NSDate *currentDate = [NSDate date];
5
6    double timeStamp = [currentDate timeIntervalSince1970];
7
8    NSString *videoName = [[NSString stringWithFormat:@"%f",timeStamp] stringByAppendingString:@".mp4"];
9
10
11	NSString *documentsDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
12
13    NSString *videoDirPath = [documentsDirPath stringByAppendingPathComponent:@"video_export"];
14
15    [[NSFileManager defaultManager] createDirectoryAtPath:videoDirPath withIntermediateDirectories:YES attributes:nil error:nil];
16
17    NSURL *documentsDirUrl = [NSURL fileURLWithPath:videoDirPath isDirectory:YES];
18
19    NSURL *output = [NSURL URLWithString:name relativeToURL:documentsDirUrl];
20
21    RMVPVideoEditConfig *config = [RMVPMediaConfigManager defaultEditConfig];
22
23    self.mediaExporter = [[RMVPMediaExporter alloc] initWithMediaTracksCenter:self.videoTrack outputURL:output config:config];
24
25    [self.mediaExporter startExportWithProgress:^(CGFloat progress) {
26
27        NSLog(@"media - exporter - progress %f", progress);
28
29    } completion:^(BOOL success, NSError *error) {
30
31        if (success) {
32
33            NSLog(@"media - exporter - success");
34
35            dispatch_async(dispatch_get_global_queue(0, 0), ^{
36
37                [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
38
39                    [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:output];
40
41                } completionHandler:^(BOOL success, NSError * _Nullable error) {
42
43                    if (success) {
44
45                        [self.previewer resumePreview];
46
47                    }
48
49                }];
50
51            });
52
53        } else {
54        }
55
56    }];