获取视频帧图片
- (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;
}
保存视频到本地
- (void)saveVideo:(NSString *)videoPath{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(videoPath)) {
//保存相册核心代码
UISaveVideoAtPathToSavedPhotosAlbum(videoPath, self, @selector(video:didFinishSavingWithError:contextInfo:), nil);
}
});
}
#pragma mark 视频保存完毕的回调
- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInf{
if (error) {
[SVProgressHUD showErrorWithStatus:@"保存失败!"];
[SVProgressHUD dismiss];
NSLog(@"保存视频过程中发生错误，错误信息:%@",error.localizedDescription);
}else{
[SVProgressHUD dismiss];
[SVProgressHUD showSuccessWithStatus:@"保存成功!"];
int64_t delayInSeconds = 1.0; // 延迟的时间
/*
*@parameter 1,时间参照，从此刻开始计时
*@parameter 2,延时多久，此处为秒级，还有纳秒等。10ull * NSEC_PER_MSEC
*/
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
// do something
[SVProgressHUD dismiss];
});
}
}
网友评论