iOS Cut video footage into thumbnails

In this paper, we share the specific code of cutting iOS video into thumbnails for your reference. The specific contents are as follows

Remember to import the system library

#import < MediaPlayer/MediaPlayer.h >

Code:

/**
 *  Method of obtaining all thumbnails of network video 
 *
 * @param videoURL  Link address of video 
 *
 * @return  Video screenshot 
 */
+ (UIImage *)ihefe_previewImageWithVideoURL:(NSURL *)videoURL
{
 AVAsset *asset = [AVAsset assetWithURL:videoURL];

 AVAssetImageGenerator *generator = [AVAssetImageGenerator assetImageGeneratorWithAsset:asset];
 generator.appliesPreferredTrackTransform = YES;

 CGImageRef img = [generator copyCGImageAtTime:CMTimeMake(1, asset.duration.timescale) actualTime:NULL error:nil];
 UIImage *image = [UIImage imageWithCGImage:img];

 CGImageRelease(img);
 return image;
}

/**
 *  Method for obtaining all thumbnails of local video 
 *
 * @param fileurl  Link address of video 
 *
 * @return  Video screenshot 
 */
+ (UIImage *)ihefe_getScreenShotImageFromVideoURL:(NSString *)fileurl
{

 UIImage *shotImage;
 // Video path URL
 NSURL *fileURL = [NSURL URLWithString:fileurl];

 AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:fileURL options:nil];

 AVAssetImageGenerator *gen = [[AVAssetImageGenerator alloc] initWithAsset:asset];

 gen.appliesPreferredTrackTransform = YES;

 CMTime time = CMTimeMakeWithSeconds(0.0, 600);

 NSError *error = nil;

 CMTime actualTime;

 CGImageRef image = [gen copyCGImageAtTime:time actualTime:&actualTime error:&error];

 shotImage = [[UIImage alloc] initWithCGImage:image];

 CGImageRelease(image);

 return shotImage;
}

/**
 *  Gets some of the video 1 Frame thumbnail method 
 *
 * @param videoURL  Link address of video   Frame time 
 * @param time   Frame time 
 *
 * @return  Video screenshot 
 */
+ (UIImage*)ihefe_thumbnailImageForVideo:(NSURL *)videoURL atTime:(NSTimeInterval)time
{
 AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:videoURL options:nil];
 NSParameterAssert(asset);
 AVAssetImageGenerator *assetImageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
 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] : nil;

 return thumbnailImage;
}