Every time I try to generate a still frame from my video asset, it is generated at a time of 0.000.. seconds. I can see this from my log message. The good thing is that I can get the image at time 0.000.. to show up in a UIImageView called "myImageView." I thought the problem was that AVURLAssetPreferPreciseDurationAndTimingKey was not set, but even after I figured out how to do that, it still does not function..
Here is what I have..
time, actualTime, and generate are declared in the Header
NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"Documents/videoTest4.m4v"]];
//UISaveVideoAtPathToSavedPhotosAlbum(path, self, @selector(video:didFinishSavingWithError:contextInfo:), nil);
NSURL *url = [NSURL fileURLWithPath:path];
NSDictionary *options = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:AVURLAssetPreferPreciseDurationAndTimingKey];
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:url options:options];
Float64 durationSeconds = CMTimeGetSeconds([asset duration]);
generate = [[AVAssetImageGenerator alloc] initWithAsset:asset];
NSError *err = nil;
time = CMTimeMake(600,600.0);
CGImageRef imgRef = [generate copyCGImageAtTime:time actualTime:&actualTime error:&err];
UIImage *currentImg = [[UIImage alloc] initWithCGImage:imgRef];
myImageView.image = currentImg;
NSLog(@"The total Video Duration is %f",durationSeconds);
NSLog(@"The time I want my image is %f",CMTimeGetSeconds(time));
NSLog(@"The actual time my image was take was %f",CMTimeGetSeconds(actualTime));
And my Console reads..
2011-04-28 18:49:59.062 videoTest[26553:207] The total Video Duration is 1.880000
2011-04-28 18:49:59.064 videoTest[26553:207] The time I want my image is 1.000000
2011-04-28 18:49:59.064 videoTest[26553:207] The actual time my image was take was 0.000000
..........................
Thank you guys so much in advance.. :)
To resolve this you just need to set requestedTimeToleranceBefore and requestedTimeToleranceAfter to kCMTimeZero for AVAssetImageGenerator.