问题
So I have this basic video recording application working, but i'm wondering how I can set the frame rate (I think thats the right term) of the video capture, so when looking at the camera feed live on screen and also for that reduced capture rate to be captured when recording as well to give that slow blurry effect?
my code so far is: HEADER
// ViewController.h
// VideoTest
//
//
#import <UIKit/UIKit.h>
#import <MediaPlayer/MediaPlayer.h>
#import <MobileCoreServices/MobileCoreServices.h>
@interface ViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
@property (copy, nonatomic) NSURL *movieURL;
@property (strong, nonatomic) MPMoviePlayerController *movieController;
- (IBAction)takeVideo:(UIButton *)sender;
@end
IMPLEMENTATION:
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
// Check if the unit has a camera
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Oops"
message:@"Sorry but this device has no camera."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles: nil];
[myAlertView show];
}else{
[super viewDidLoad];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
// Capture Video Action
- (IBAction)takeVideo:(UIButton *)sender {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
[self presentViewController:picker animated:YES completion:NULL];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
self.movieURL = info[UIImagePickerControllerMediaURL];
[picker dismissViewControllerAnimated:YES completion:NULL];
}
// Recording Cancelled
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissViewControllerAnimated:YES completion:NULL];
}
- (void)viewDidAppear:(BOOL)animated {
self.movieController = [[MPMoviePlayerController alloc] init];
[self.movieController setContentURL:self.movieURL];
[self.movieController.view setFrame:CGRectMake (0, 0, 320, 476)];
[self.view addSubview:self.movieController.view];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:self.movieController];
[self.movieController play];
}
// Playback ended
- (void)moviePlayBackDidFinish:(NSNotification *)notification {
[[NSNotificationCenter defaultCenter]removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:nil];
[self.movieController stop];
[self.movieController.view removeFromSuperview];
self.movieController = nil;
}
@end
来源：https://stackoverflow.com/questions/19425429/how-to-set-video-capture-frame-rate