本文实例为大家分享了iOS视频录像切成缩略图的具体代码，供大家参考，具体内容如下
记得导入系统库
#import < MediaPlayer/MediaPlayer.h >
代码：
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/**
* 获取网络视频的全部缩略图方法
*
* @param videoURL 视频的链接地址
*
* @return 视频截图
*/
+ (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;
}
/**
* 获取本地视频的全部缩略图方法
*
* @param fileurl 视频的链接地址
*
* @return 视频截图
*/
+ (UIImage *)ihefe_getScreenShotImageFromVideoURL:(NSString *)fileurl
{
UIImage *shotImage;
//视频路径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;
}
/**
* 获取视频的某一帧缩略图方法
*
* @param videoURL 视频的链接地址 帧时间
* @param time 帧时间
*
* @return 视频截图
*/
+ (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;
}
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://blog.csdn.net/hanrovey/article/details/53316766