首页 > 代码库 > iOS 对视频抽帧。

iOS 对视频抽帧。

这里有两种方法可以采用,

方法一:使用MPMoviePlayerController

MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc]  initWithContentURL:videoURL];moviePlayer.shouldAutoplay = NO; UIImage *thumbnail = [moviePlayer thumbnailImageAtTime:time timeOption:MPMovieTimeOptionNearestKeyFrame];

 

优点:操作简单,省事

缺点:不够轻量,抓取图片耗时。

 

方法二:使用AVAssetImageGenerator

+ (UIImage*) 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;}

 

iOS 对视频抽帧。