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Douglas Rogers
Douglas Rogers
2,619 Points

thumbnailImageAtTime is deprecated in iOS7. Alternative?

I'm getting a warning that thumbnailImageAtTime is deprecated in iOS 7. Is there a work around. I found this on StackOverflow, but it seems less than elegant as a solution to replace a single method call: http://stackoverflow.com/questions/19105721/thumbnailimageattime-now-deprecated-whats-the-alternative

Here's the line:

[self.moviePlayer thumbnailImageAtTime:0 timeOption:MPMovieTimeOptionNearestKeyFrame];

is there a better, cleaner/shorter/more elegant way to get around this? im assuming it's not just a simple thing or else it would be obvious.

The SO suggested way of doing it is correct - you should be using AVAssetImageGenerator from now on.

6 Answers

Charlie Hield
Charlie Hield
4,767 Points

I got it to work using @aarondaub7's suggestion

Step 1. Add the AVFoundation.framework in the build phases panel.

Step 2. Update InboxViewController.h

#import <AVFoundation/AVFoundation.h>

Step 3. Update InboxViewController.m after the "prepareToPlay" method.

AVAsset *videoThumbnail = [AVAsset assetWithURL:fileURL];

[AVAssetImageGenerator assetImageGeneratorWithAsset:videoThumbnail];

Apple Docs -- AVAssetImageGenerator

I'm getting a bit confused on how to add this in?

Amit, thank you for the pointer.

Jonathan Fernandez
Jonathan Fernandez
8,325 Points

Wait I'm still kind of confused. I have created the method in Inbox.m and declared it in the header but have no idea how to add it. Shown below is my code and I have commented the part where I'm trying to add it. Xcode won't take in self.moviePlayer.

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    self.selectedMessage = [self.messages objectAtIndex:indexPath.row];
    NSString *fileType = [self.selectedMessage objectForKey:@"fileType"];
    if ([fileType isEqualToString:@"image"]) {
        [self performSegueWithIdentifier:@"showImage" sender:self];
    } else {
        // File Type is video
        PFFile *videoFile = [self.selectedMessage objectForKey:@"file"];
        NSURL *fileUrl = [NSURL URLWithString:videoFile.url];
        self.moviePlayer.contentURL = fileUrl;
        [self.moviePlayer prepareToPlay];

        [self.moviePlayer thumbnailFromVideoAtURL:fileUrl]; //How do I add this??

        // Add it to the view controller so we can see it.
        [self.view addSubview:self.moviePlayer.view];
        [self.moviePlayer setFullscreen:YES animated:YES];


Also how does just adding in: (from the comment of Charlie Hield)

<b> AVAsset *videoThumbnail = [AVAsset assetWithURL:fileURL];

[AVAssetImageGenerator assetImageGeneratorWithAsset:videoThumbnail]; </b>

after the "prepareToPlay" method differ from using the method from the stack flow link? Does it by default set the thumbnail capture time also at 0?

James Lin
James Lin
4,601 Points

just place with

[self.moviePlayer requestThumbnailImagesAtTimes:@[@0] timeOption:MPMovieTimeOptionNearestKeyFrame];
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

Jack Crane If you click on the Stack overflow link it takes you to the answer. The answer is a method which takes in a URL and returns a UIImage which can be assigned to the image property of a UIImageView.