iOS 4 Programming Cookbook by Vandad Nahavandipoor

Author:Vandad Nahavandipoor [Vandad Nahavandipoor]
Language: eng
Format: epub
Tags: COMPUTERS / Hardware / Personal Computers / Macintosh
ISBN: 9781449388232
Publisher: O'Reilly Media
Published: 2011-01-13T16:00:00+00:00

See Also

Recipe 8.7

8.7. Capturing Thumbnails from a Video File Asynchronously

Problem

You are playing a video file using an instance of the MPMoviePlayerController class and would like to capture a screenshot from the movie at a certain time.

Solution

Use the requestThumbnailImagesAtTimes:timeOption: instance method of MPMoviePlayerController like so:

/* Capture the frame at the third second into the movie */ NSNumber *thirdSecondThumbnail = [NSNumber numberWithFloat:3.0f]; /* We can ask to capture as many frames as we want. But for now, we are just asking to capture one frame */ NSArray *requestedThumbnails = [NSArray arrayWithObject:thirdSecondThumbnail]; /* Ask the movie player to capture this frame for us */ [self.moviePlayer requestThumbnailImagesAtTimes:requestedThumbnails timeOption:MPMovieTimeOptionExact];

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