为视频创建缩略图

Question

我正在尝试将视频的第一帧捕获为UIImageView，以便在整个应用中使用。什么是完成这个的赌注？

Answer 1

在我的应用程序中，我使用了这段代码：

#import <AssetsLibrary/AssetsLibrary.h>
#import <AVFoundation/AVFoundation.h>
#import <AudioToolbox/AudioToolbox.h>
#import <CoreMedia/CoreMedia.h>
#import <MediaPlayer/MediaPlayer.h>

//create thumbnail from video


 AVAsset *asset = [AVAsset assetWithURL:url];// url= give your url video here
    AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc]initWithAsset:asset];
    CMTime time = CMTimeMake(1, 5);//it will create the thumbnail after the 5 sec of video 
    CGImageRef imageRef = [imageGenerator copyCGImageAtTime:time actualTime:NULL error:NULL];
    UIImage *thumbnail = [UIImage imageWithCGImage:imageRef];
     cell.backGround.image=thumbnail;// whichever imageview you want give this image

我希望它会有所帮助。

Answer 2

传递视频网址，视频网址又会返回视频的缩略图。

-(UIImage *)getThumbNail:(NSString)stringPath
{
  NSURL *videoURL = [NSURL fileURLWithPath:stringPath];

  MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:videoURL];

    UIImage *thumbnail = [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame];

    //Player autoplays audio on init
    [player stop];
    [player release];
    return thumbnail;
 }

Answer 3

以下是代码，您可以通过视频网址获取录制视频的缩略图。

MPMoviePlayerController *player = [[[MPMoviePlayerController alloc] initWithContentURL:videoURL]autorelease];
UIImage  *thumbnail = [player thumbnailImageAtTime:0.0 timeOption:MPMovieTimeOptionNearestKeyFrame];