iOS获取某一时间点视频桢截图

来源：互联网发布：加拿大28百分百中算法编辑：程序博客网时间：2024/05/08 20:59

+ (UIImage*) thumbnailImageForVideo:(NSURL *)videoURL atTime:(NSTimeInterval)time {    AVURLAsset *asset = [[[AVURLAsset alloc] initWithURL:videoURL options:nil] autorelease];    NSParameterAssert(asset);    AVAssetImageGenerator *assetImageGenerator = [[[AVAssetImageGenerator alloc] initWithAsset:asset] autorelease];    assetImageGenerator.appliesPreferredTrackTransform = YES;    assetImageGenerator.apertureMode = AVAssetImageGeneratorApertureModeEncodedPixels;        CGImageRef thumbnailImageRef = NULL;    CFTimeInterval thumbnailImageTime = time;    NSError *thumbnailImageGenerationError = nil;    thumbnailImageRef = [assetImageGenerator copyCGImageAtTime:CMTimeMake(thumbnailImageTime, 60) actualTime:NULL error:&thumbnailImageGenerationError];        if (!thumbnailImageRef)        NSLog(@"thumbnailImageGenerationError %@", thumbnailImageGenerationError);        UIImage *thumbnailImage = thumbnailImageRef ? [[[UIImage alloc] initWithCGImage:thumbnailImageRef] autorelease] : nil;        return thumbnailImage;}

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