//視頻轉換為MP4//轉碼操作..._hud.mode = MBProgressHUDModeIndeterminate;_hud.labelText = @"轉碼中...";AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:_filePathURL options:nil];NSDateFormatter* formater = [[NSDateFormatter alloc] init];[formater setDateFormat:@"yyyyMMddHHmmss"];_fileName = [NSString stringWithFormat:@"output-%@.mp4",[formater stringFromDate:[NSDate date]]];_outfilePath = [NSHomeDirectory() stringByAppendingFormat:@"/Documents/%@", _fileName];NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];if ([compatiblePresets containsObject:AVAssetExportPresetMediumQuality]) {  MyLog(@"outPath = %@",_outfilePath);  AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]initWithAsset:avAsset presetName:AVAssetExportPresetMediumQuality];  exportSession.outputURL = [NSURL fileURLWithPath:_outfilePath];  exportSession.outputFileType = AVFileTypeMPEG4;  [exportSession exportAsynchronouslyWithCompletionHandler:^{    if ([exportSession status] == AVAssetExportSessionStatusCompleted) {      MyLog(@"AVAssetExportSessionStatusCompleted---轉換成功");      _filePath = _outfilePath;      _filePathURL = [NSURL URLWithString:[NSString stringWithFormat:@"file://%@",_outfilePath]];       MyLog(@"轉換完成_filePath = %@//n_filePathURL = %@",_filePath,_filePathURL);      //獲取大小和長度      [self SetViewText];      [self uploadNetWorkWithParam:@{@"contenttype":@"application/octet-stream",@"discription":description}];    }else{      MyLog(@"轉換失敗,值為:%li,可能的原因:%@",(long)[exportSession status],[[exportSession error] localizedDescription]);      [_hud hide:YES];      [MyHelper showAlertWith:nil txt:@"轉換失敗,請重試"];    }  }];}

- (void)uploadNetWorkWithParam:(NSDictionary*)dict {  MyLog(@"開始上傳_filePath = %@//n_filePathURL = %@",_filePath,_filePathURL);  AFHTTPRequestSerializer *ser=[[AFHTTPRequestSerializer alloc]init];  NSMutableURLRequest *request =  [ser multipartFormRequestWithMethod:@"POST"               URLString:[NSString stringWithFormat:@"%@%@",kBaseUrl,kVideoUploadUrl]               parameters:@{@"path":@"show",@"key":_key,@"discription":dict[@"discription"],@"isimage":@(_isImage)}       constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {           [formData appendPartWithFileURL:_filePathURL name:@"file" fileName:_fileName mimeType:dict[@"contenttype"] error:nil];         if (!_isImage) {    [formData appendPartWithFileURL:_path2Url name:@"tmp" fileName:@"tmp.PNG" mimeType:@"image/png" error:nil];         }       } error:nil];  //@"image/png"  @"application/octet-stream" mimeType  AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];  NSProgress *progress = nil;  NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithStreamedRequest:request progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {    if (error) {       MyLog(@"request = %@", request );       MyLog(@"response = %@", response );      MyLog(@"Error: %@", error );      [_hud hide:YES];      CXAlertView *alert=[[CXAlertView alloc]initWithTitle:NSLocalizedString(@"Warning", nil)                             message:NSLocalizedString(@"Upload Failed",nil)                        cancelButtonTitle:NSLocalizedString(@"Iknow", nil)];      alert.showBlurBackground = NO;      [alert show];    } else {      MyLog(@"%@ %@", response, responseObject);      NSDictionary *backDict=(NSDictionary *)responseObject;      if ([backDict[@"success"] boolValue] != NO) {        _hud.labelText = NSLocalizedString(@"Updating", nil);        [self UpdateResxDateWithDict:backDict discription:dict[@"discription"]];        [_hud hide:YES];      }else{        [_hud hide:YES];        [MyHelper showAlertWith:nil txt:backDict[@"msg"]];      }    }    [progress removeObserver:self           forKeyPath:@"fractionCompleted"             context:NULL];  }];  [progress addObserver:self        forKeyPath:@"fractionCompleted"         options:NSKeyValueObservingOptionNew         context:NULL];  [progress setUserInfoObject:@"someThing" forKey:@"Y.X."];  [uploadTask resume];}

-(void)ClearMovieFromDoucments{  NSFileManager *fileManager = [NSFileManager defaultManager];  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  NSString *documentsDirectory = [paths objectAtIndex:0];  NSArray *contents = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:NULL];  NSEnumerator *e = [contents objectEnumerator];  NSString *filename;  while ((filename = [e nextObject])) {    MyLog(@"%@",filename);    if ([filename isEqualToString:@"tmp.PNG"]) {      MyLog(@"刪除%@",filename);      [fileManager removeItemAtPath:[documentsDirectory stringByAppendingPathComponent:filename] error:NULL];      continue;    }    if ([[[filename pathExtension] lowercaseString] isEqualToString:@"mp4"]||      [[[filename pathExtension] lowercaseString] isEqualToString:@"mov"]||      [[[filename pathExtension] lowercaseString] isEqualToString:@"png"]) {      MyLog(@"刪除%@",filename);      [fileManager removeItemAtPath:[documentsDirectory stringByAppendingPathComponent:filename] error:NULL];    }  }}