iOS录制（或选择）视频，压缩、上传（整理） （转载版的）

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];

}