Rotate recorded video by 90 degree programmatically in iOS - ios

Question

I have recorded a video in iphone and I am getting its local file URL. Is there any way to rotate that video by 90 degree using the URL?

Answer 1

You can rotate the Video before exporting session using AVMutableVideoCompositionLayerInstruction class and you can apply Transform on it .
This is the method
[yourlayerInstruction setTransform:CGAffineTransformMakeRotation(M_PI/2) atTime:firstAssets.duration];
here is the full implementation
AVMutableComposition *mixComposition = [[AVMutableComposition alloc] init];
AVMutableCompositionTrack *firstTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
AVMutableVideoCompositionInstruction * mainInstruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
mainInstruction.timeRange = CMTimeRangeMake(kCMTimeZero, CMTimeAdd(firstAsset.duration, secondAsset.duration));
AVMutableVideoCompositionLayerInstruction *firstlayerInstruction = [AVMutableVideoCompositionLayerInstruction
videoCompositionLayerInstructionWithAssetTrack:firstTrack];
// set Trasform Here
[firstlayerInstruction setTransform:CGAffineTransformMakeRotation(M_PI/2) atTime:kCMTimeZero];
[firstlayerInstruction setOpacity:0.0 atTime:firstAsset.duration];
mainInstruction.layerInstructions = [NSArray arrayWithObjects:firstlayerInstruction,nil];;
AVMutableVideoComposition *mainCompositionInst = [AVMutableVideoComposition videoComposition];
mainCompositionInst.instructions = [NSArray arrayWithObject:mainInstruction];
mainCompositionInst.frameDuration = CMTimeMake(1, 30);
mainCompositionInst.renderSize = CGSizeMake(320.0, 480.0);
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition
presetName:AVAssetExportPreset640x480];
exporter.outputURL=url;
exporter.videoComposition=mainCompositionInst;
exporter.outputFileType = AVFileTypeQuickTimeMovie;
exporter.shouldOptimizeForNetworkUse = YES;
[exporter exportAsynchronouslyWithCompletionHandler:^{
dispatch_async(dispatch_get_main_queue(), ^
{
[self exportDidFinish:exporter];
});
}];
i hope this will help you

Answer 2

If you are using MPMoviePlayerViewController for playing video:-
Then you can try this,
First fetch your url from bundle using below line,
NSURL *fileUrl = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"your video" ofType:#"mp4"]];
Or you can use your local file url directly in mpmovieplayerviewcontroller
Then create MPmovieplayerview controller's object and use your video file as shown below :-
MPMoviePlayerViewController *moviePlayerController = [[MPMoviePlayerViewController alloc]initWithContentURL:fileUrl];
[moviePlayerController.moviePlayer prepareToPlay];
moviePlayerController.view.transform = CGAffineTransformMakeRotation(M_PI/2);
[self.view addSubview:moviePlayerController.view];
Hope it helps!