How to take a screenshot from an video playing thr

问题:

Can anybody help me in this? I want to get an screenshot from an video playing through MPMediaPlayerController. What i have tried so far is:-

-(void)viewDidLoad
{
NSURL *tempFilePathURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"LMFao" ofType:@"mp4"]];
player = [[MPMoviePlayerController alloc] initWithContentURL:tempFilePathURL];
[player setControlStyle:MPMovieControlStyleFullscreen];
//Place it in subview, else it won’t work
player.view.frame = CGRectMake(0, 0, 320, 400);
[self.view addSubview:player.view];
}

-(IBAction)screenshot
{
CGRect rect = [player.view bounds];
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[player.view.layer renderInContext:context];   
image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

imgView = [[UIImageView alloc] initWithFrame:CGRectMake(150, 150, 100, 100)];
[imgView setImage:image];
imgView.layer.borderWidth = 2.0;
[self.view addSubview:imgView];
}

And what i ve got now is this:-

what is happening now is my player's button are getting captured in ScreenShot but my video's image is not been getting.I'm using this context method to capture my image because i have an overlay on my video,using thumbnail method i cant capture video with overlay but i want to get video's image with overlay.

EDIT: what i want is getting screenshot of both this video and drawing overlay as shown in this image

But what i m getting is by one method i got only video not overlay in my screenshot that method is thumbnail method,i was doing thumbnailing in that which is given by MPMoviePlayerController and by second method i m getting only overlay not an video in ma screenshot,that method is context method.i'm getting context of rect.Now i thought solution for this may be is k i combine both these images.So help me out by giving suggestion is merging images will work for me or not???

Please help.Thanks :)

回答1:

U can merge two image from this way.Please have an look from the below code..

- (UIImage*) maskImage:(UIImage *)image withMask:(UIImage *)maskImage {
    MaskView=[[UIView alloc] init];
    UIImageView *image1=[[UIImageView alloc]init];
    UIImageView *image2=[[UIImageView alloc]init];
    MaskView.frame=CGRectMake(0, 0,500,500);    
    image1.frame=CGRectMake(0,0,160, 160);  
    image2.frame=CGRectMake(60,54,40,40);
    image1.image=image;
    image2.image=maskImage;
    [MaskView addSubview:image1];
    [MaskView addSubview:image2];   

    UIGraphicsBeginImageContext(CGSizeMake(160,160));

    [MaskView.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *finishedPic = UIGraphicsGetImageFromCurrentImageContext(); 

    return finishedPic;
}

回答2:

You just have to call a single method on your mpmovieplayer object:

- (UIImage *)thumbnailImageAtTime:(NSTimeInterval)playbackTime timeOption:(MPMovieTimeOption)option

this method will return a UIImage object. what you have to do is just:

UIImage *thumbnail = [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame];

for more details look at MPMoviePlayerController

Hope this helps

EDIT: In your method you can first hide player's control and than capture Image after that show controls again. you can achive this using controlStyle property of MPMoviePlayerController.

Not sure this is what you are looking for but it is what I understood. If you are looking for different let me know.

回答3:

This may help

  - (UIImage *)thumbnailImageAtTime:(NSTimeInterval)playbackTime timeOption:(MPMovieTimeOption)option

Get the thumbnailImage at the given time and scale that image.