最新做的一個功能涉及到了視頻的錄製、壓縮及上傳。根據網上諸多大神的經驗,終於算是調通了,但也發現了一些問題,所以把我的經驗分享一下。
首先,肯定是調用一下系統的相機或相冊
代碼很基本:
- //選擇本地視頻
- - (void)choosevideo
- {
- UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
- ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//sourcetype有三種分別是camera,photoLibrary和photoAlbum
- NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//Camera所支持的Media格式都有哪些,共有兩個分別是@"public.image",@"public.movie"
- ipc.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//設置媒體類型爲public.movie
- [self presentViewController:ipc animated:YES completion:nil];
- ipc.delegate = self;//設置委託
- }
- //錄製視頻
- - (void)startvideo
- {
- UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
- ipc.sourceType = UIImagePickerControllerSourceTypeCamera;//sourcetype有三種分別是camera,photoLibrary和photoAlbum
- NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//Camera所支持的Media格式都有哪些,共有兩個分別是@"public.image",@"public.movie"
- ipc.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//設置媒體類型爲public.movie
- [self presentViewController:ipc animated:YES completion:nil];
- ipc.videoMaximumDuration = 30.0f;//30秒
- ipc.delegate = self;//設置委託
- }
iOS錄製的視頻格式是mov的,在Android和Pc上都不太好支持,所以要轉換爲MP4格式的,而且壓縮一下,畢竟我們上傳的都是小視頻,不用特別清楚
爲了反饋的清楚,先放兩個小代碼來獲取視頻的時長和大小,也是在網上找的,稍微改了一下。
- - (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];//獲取文件的屬性
- unsigned long long size = [[fileDic objectForKey:NSFileSize] longLongValue];
- filesize = 1.0*size/1024;
- }else{
- NSLog(@"找不到文件");
- }
- return filesize;
- }//此方法可以獲取文件的大小,返回的是單位是KB。
- - (CGFloat) getVideoLength:(NSURL *)URL
- {
- AVURLAsset *avUrl = [AVURLAsset assetWithURL:URL];
- CMTime time = [avUrl duration];
- int second = ceil(time.value/time.timescale);
- return second;
- }//此方法可以獲取視頻文件的時長。
接收並壓縮
- //完成視頻錄製,並壓縮後顯示大小、時長
- - (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];//用時間給文件全名,以免重複,在測試的時候其實可以判斷文件是否存在若存在,則刪除,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]]]] ;//這個是保存在app自己的沙盒路徑裏,後面可以選擇是否在上傳後刪除掉。我建議刪除掉,免得佔空間。
- [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);//這個是保存到手機相冊
- [self alertUploadVideo:outputURL];
- break;
- case AVAssetExportSessionStatusFailed:
- NSLog(@"AVAssetExportSessionStatusFailed");
- break;
- }
- }];
- }
我這裏用了一個提醒,因爲我的服務器比較弱,不能傳太大的文件
- -(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:@"視頻%@,大於2MB會有點慢,確定上傳嗎?", 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];//取消之後就刪除,以免佔用手機硬盤空間(沙盒)
- }]];
- [alertController addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
- [self uploadVideo:URL];
- }]];
- [self presentViewController:alertController animated:YES completion:nil];
- }else if(sizemb>5){
- message = [NSString stringWithFormat:@"視頻%@,超過5MB,不能上傳,抱歉。", sizeString];
- UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil
- message: message
- preferredStyle:UIAlertControllerStyleAlert];
- [alertController addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
- [[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil];
- [[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//取消之後就刪除,以免佔用手機硬盤空間
- }]];
- [self presentViewController:alertController animated:YES completion:nil];
- }
- }
最後上上傳的代碼,這個是根據服務器來的,而且還是用的MKNetworking,據說已經過時了,放上來大家參考一下吧,AFNet也差不多,就是把NSData傳上去。
- -(void)uploadVideo:(NSURL*)URL{
- //[MyTools showTipsWithNoDisappear:nil message:@"正在上傳..."];
- 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];//上傳之後就刪除,以免佔用手機硬盤空間;
- }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];
- }