First frame of a video using AVFoundation

objective-c ios avfoundation
null0pointer picture null0pointer · Apr 19, 2012 · Viewed 11.1k times · Source

I'm trying to get the first frame of a video using the classes in AVFoundation. But it appears to not be getting an image at all.

My code currently looks like this

AVURLAsset* asset = [AVURLAsset URLAssetWithURL:[NSURL URLWithString:videoPath] options:nil];
AVAssetImageGenerator* imageGenerator = [AVAssetImageGenerator assetImageGeneratorWithAsset:asset];
UIImage* image = [UIImage imageWithCGImage:[imageGenerator copyCGImageAtTime:CMTimeMake(0, 1) actualTime:nil error:nil]];
[videoFrame setImage:image];

The value of video path is /var/mobile/Applications/02F42CBF-D8BD-4155-85F2-8CF1E55B5023/Documents/videos/1334300431637030.mp4 which is definitely a video, since I can play it with MPMoviePlayerViewController. I'm not sure what I'm doing wrong but any suggestions would be helpful.

Thanks.

Answer

null0pointer picture null0pointer · Apr 19, 2012

I solved it. Apparently using [NSURL fileURLWithPath:videoPath] instead of [NSURL URLWithString:videoPath] makes all the difference.

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