iOS 获取视频第一帧图片

#import <AVFoundation/AVAsset.h>

#import <AVFoundation/AVAssetImageGenerator.h>

#import <AVFoundation/AVTime.h>

// 获取视频第一帧
- (UIImage*) getVideoPreViewImage:(NSURL *)path
{
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:path options:nil];
AVAssetImageGenerator *assetGen = [[AVAssetImageGenerator alloc] initWithAsset:asset];

assetGen.appliesPreferredTrackTransform = YES;
CMTime time = CMTimeMakeWithSeconds(0.0, 600);
NSError *error = nil;
CMTime actualTime;
CGImageRef image = [assetGen copyCGImageAtTime:time actualTime:&actualTime error:&error];
UIImage *videoImage = [[UIImage alloc] initWithCGImage:image];
CGImageRelease(image);
return videoImage;
}