最新做的一个功能涉及到了视频的录制、压缩及上传。根据网上诸多大神的经验，终于算是调通了，但也发现了一些问题，所以把我的经验分享一下。
首先，肯定是调用一下系统的相机或相册
代码很基本：
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//选择本地视频 - (void)choosevideo { UIImagePickerController *ipc = [[UIImagePickerController alloc] init]; ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//sourcetype有三种分别是camera，photoLibrary和photoAlbum NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//Camera所支持的Media格式都有哪些,共有两个分别是@"public.image",@"public.movie" ipc.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//设置媒体类型为public.movie [self presentViewController:ipc animated:YES completion:nil]; ipc.delegate = self;//设置委托 } //录制视频 - (void)startvideo { UIImagePickerController *ipc = [[UIImagePickerController alloc] init]; ipc.sourceType = UIImagePickerControllerSourceTypeCamera;//sourcetype有三种分别是camera，photoLibrary和photoAlbum NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//Camera所支持的Media格式都有哪些,共有两个分别是@"public.image",@"public.movie" ipc.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//设置媒体类型为public.movie [self presentViewController:ipc animated:YES completion:nil]; ipc.videoMaximumDuration = 30.0f;//30秒 ipc.delegate = self;//设置委托 } |
iOS录制的视频格式是mov的，在Android和Pc上都不太好支持，所以要转换为MP4格式的，而且压缩一下，毕竟我们上传的都是小视频，不用特别清楚
为了反馈的清楚，先放两个小代码来获取视频的时长和大小，也是在网上找的，稍微改了一下。
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- (CGFloat) getFileSize:(NSString *)path { NSLog(@"%@",path); NSFileManager *fileManager = [NSFileManager defaultManager]; float filesize = -1.0; if ([fileManager fileExistsAtPath:path]) { NSDictionary *fileDic = [fileManager attributesOfItemAtPath:path error:nil];//获取文件的属性 unsigned long long size = [[fileDic objectForKey:NSFileSize] longLongValue]; filesize = 1.0*size/1024; }else{ NSLog(@"找不到文件"); } return filesize; }//此方法可以获取文件的大小，返回的是单位是KB。 - (CGFloat) getVideoLength:(NSURL *)URL { AVURLAsset *avUrl = [AVURLAsset assetWithURL:URL]; CMTime time = [avUrl duration]; int second = ceil(time.value/time.timescale); return second; }//此方法可以获取视频文件的时长。 |
接收并压缩
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//完成视频录制，并压缩后显示大小、时长 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { NSURL *sourceURL = [info objectForKey:UIImagePickerControllerMediaURL]; NSLog(@"%@",[NSString stringWithFormat:@"%f s", [self getVideoLength:sourceURL]]); NSLog(@"%@", [NSString stringWithFormat:@"%.2f kb", [self getFileSize:[sourceURL path]]]); NSURL *newVideoUrl ; //一般.mp4 NSDateFormatter *formater = [[NSDateFormatter alloc] init];//用时间给文件全名，以免重复，在测试的时候其实可以判断文件是否存在若存在，则删除，重新生成文件即可 [formater setDateFormat:@"yyyy-MM-dd-HH:mm:ss"]; newVideoUrl = [NSURL fileURLWithPath:[NSHomeDirectory() stringByAppendingFormat:@"/Documents/output-%@.mp4", [formater stringFromDate:[NSDate date]]]] ;//这个是保存在app自己的沙盒路径里，后面可以选择是否在上传后删除掉。我建议删除掉，免得占空间。 [picker dismissViewControllerAnimated:YES completion:nil]; [self convertVideoQuailtyWithInputURL:sourceURL outputURL:newVideoUrl completeHandler:nil]; } - (void) convertVideoQuailtyWithInputURL:(NSURL*)inputURL outputURL:(NSURL*)outputURL completeHandler:(void (^)(AVAssetExportSession*))handler { AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:inputURL options:nil]; AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:avAsset presetName:AVAssetExportPresetMediumQuality]; // NSLog(resultPath); exportSession.outputURL = outputURL; exportSession.outputFileType = AVFileTypeMPEG4; exportSession.shouldOptimizeForNetworkUse= YES; [exportSession exportAsynchronouslyWithCompletionHandler:^(void) { switch (exportSession.status) { case AVAssetExportSessionStatusCancelled: NSLog(@"AVAssetExportSessionStatusCancelled"); break; case AVAssetExportSessionStatusUnknown: NSLog(@"AVAssetExportSessionStatusUnknown"); break; case AVAssetExportSessionStatusWaiting: NSLog(@"AVAssetExportSessionStatusWaiting"); break; case AVAssetExportSessionStatusExporting: NSLog(@"AVAssetExportSessionStatusExporting"); break; case AVAssetExportSessionStatusCompleted: NSLog(@"AVAssetExportSessionStatusCompleted"); NSLog(@"%@",[NSString stringWithFormat:@"%f s", [self getVideoLength:outputURL]]); NSLog(@"%@", [NSString stringWithFormat:@"%.2f kb", [self getFileSize:[outputURL path]]]); //UISaveVideoAtPathToSavedPhotosAlbum([outputURL path], self, nil, NULL);//这个是保存到手机相册 [self alertUploadVideo:outputURL]; break; case AVAssetExportSessionStatusFailed: NSLog(@"AVAssetExportSessionStatusFailed"); break; } }]; } |
我这里用了一个提醒，因为我的服务器比较弱，不能传太大的文件
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-(void)alertUploadVideo:(NSURL*)URL{ CGFloat size = [self getFileSize:[URL path]]; NSString *message; NSString *sizeString; CGFloat sizemb= size/1024; if(size<=1024){ sizeString = [NSString stringWithFormat:@"%.2fKB",size]; }else{ sizeString = [NSString stringWithFormat:@"%.2fMB",sizemb]; } if(sizemb<2){ [self uploadVideo:URL]; } else if(sizemb<=5){ message = [NSString stringWithFormat:@"视频%@，大于2MB会有点慢，确定上传吗？", sizeString]; UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil message: message preferredStyle:UIAlertControllerStyleAlert]; [alertController addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { [[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil]; [[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//取消之后就删除，以免占用手机硬盘空间（沙盒） }]]; [alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { [self uploadVideo:URL]; }]]; [self presentViewController:alertController animated:YES completion:nil]; }else if(sizemb>5){ message = [NSString stringWithFormat:@"视频%@，超过5MB，不能上传，抱歉。", sizeString]; UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil message: message preferredStyle:UIAlertControllerStyleAlert]; [alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { [[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil]; [[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//取消之后就删除，以免占用手机硬盘空间 }]]; [self presentViewController:alertController animated:YES completion:nil]; } } |
最后上上传的代码，这个是根据服务器来的，而且还是用的MKNetworking，据说已经过时了，放上来大家参考一下吧，AFNet也差不多，就是把NSData传上去。
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-(void)uploadVideo:(NSURL*)URL{ //[MyTools showTipsWithNoDisappear:nil message:@"正在上传..."]; NSData *data = [NSData dataWithContentsOfURL:URL]; MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"www.ylhuakai.com" customHeaderFields:nil]; NSMutableDictionary *dic = [[NSMutableDictionary alloc] init]; NSString *updateURL; updateURL = @"/alflower/Data/sendupdate"; [dic setValue:[NSString stringWithFormat:@"%@",User_id] forKey:@"openid"]; [dic setValue:[NSString stringWithFormat:@"%@",[self.web objectForKey:@"web_id"]] forKey:@"web_id"]; [dic setValue:[NSString stringWithFormat:@"%i",insertnumber] forKey:@"number"]; [dic setValue:[NSString stringWithFormat:@"%i",insertType] forKey:@"type"]; MKNetworkOperation *op = [engine operationWithPath:updateURL params:dic httpMethod:@"POST"]; [op addData:data forKey:@"video" mimeType:@"video/mpeg" fileName:@"aa.mp4"]; [op addCompletionHandler:^(MKNetworkOperation *operation) { NSLog(@"[operation responseData]-->>%@", [operation responseString]); NSData *data = [operation responseData]; NSDictionary *resweiboDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil]; NSString *status = [[resweiboDict objectForKey:@"status"]stringValue]; NSLog(@"addfriendlist status is %@", status); NSString *info = [resweiboDict objectForKey:@"info"]; NSLog(@"addfriendlist info is %@", info); // [MyTools showTipsWithView:nil message:info]; // [SVProgressHUD showErrorWithStatus:info]; if ([status isEqualToString:@"1"]) { [[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil]; [[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//上传之后就删除，以免占用手机硬盘空间; }else { //[SVProgressHUD showErrorWithStatus:dic[@"info"]]; } // [[NSNotificationCenter defaultCenter] postNotificationName:@"StoryData" object:nil userInfo:nil]; }errorHandler:^(MKNetworkOperation *errorOp, NSError* err) { NSLog(@"MKNetwork request error : %@", [err localizedDescription]); }]; [engine enqueueOperation:op]; } |
以上所述是小编给大家介绍的iOS视频录制（或选择）压缩及上传功能（整理），希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：http://blog.csdn.net/vkooy/article/details/65442600
