The latest feature involves recording, compression and uploading of videos. Based on the experience of many great masters on the Internet, it was finally adjusted, but I also found some problems, so I shared my experience.
First of all, it must be called the system's camera or album
The code is very basic:
//Select local video- (void)choosevideo
{
UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
= UIImagePickerControllerSourceTypePhotoLibrary;//There are three types of sourcetype: camera, photoLibrary and photoAlbum NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//What are the Media formats supported by Camera? There are two of them: @"", @"" = [NSArray arrayWithObject:availableMedia[1]];//Set the media type to [self presentViewController:ipc animated:YES completion:nil];
= self;//Set the delegation}
//Record video- (void)startvideo
{
UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
= UIImagePickerControllerSourceTypeCamera;//There are three types of sourcetype: camera, photoLibrary and photoAlbum NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//What are the Media formats supported by Camera? There are two of them: @"", @"" = [NSArray arrayWithObject:availableMedia[1]];//Set the media type to [self presentViewController:ipc animated:YES completion:nil];
= 30.0f;//30 seconds = self;//Set the delegation}
The video format recorded by iOS is mov and is not very easy to support on Android and PC, so it needs to be converted to MP4 format and compressed. After all, we upload all small videos, so it doesn't need to be particularly clear
In order to make feedback clear, I first put two small codes to obtain the duration and size of the video. I also found it online and changed it slightly.
- (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];//Get the file's properties unsigned long long size = [[fileDic objectForKey:NSFileSize] longLongValue];
filesize = 1.0*size/1024;
}else{
NSLog(@"File Not Found");
}
return filesize;
}//This method can get the file size, and the unit returned is KB.- (CGFloat) getVideoLength:(NSURL *)URL
{
AVURLAsset *avUrl = [AVURLAsset assetWithURL:URL];
CMTime time = [avUrl duration];
int second = ceil(/);
return second;
}//This method can obtain the duration of the video file。
Receive and compress
// Complete the video recording and display the size and duration after compression- (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 ; //General.mp4 NSDateFormatter *formater = [[NSDateFormatter alloc] init];//Please use time to give the full name of the file to avoid duplication. During the test, you can actually determine whether the file exists. If it exists, delete it and regenerate the file. [formater setDateFormat:@"yyyy-MM-dd-HH:mm:ss"];
newVideoUrl = [NSURL fileURLWithPath:[NSHomeDirectory() stringByAppendingFormat:@"/Documents/output-%@.mp4", [formater stringFromDate:[NSDate date]]]] ;//This is saved in the app's own sandbox path, and you can choose whether to delete it after uploading. I suggest deleting it so as not to take up space. [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);
= outputURL;
= AVFileTypeMPEG4;
= YES;
[exportSession exportAsynchronouslyWithCompletionHandler:^(void)
{
switch () {
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);//This is saved to mobile phone album [self alertUploadVideo:outputURL];
break;
case AVAssetExportSessionStatusFailed:
NSLog(@"AVAssetExportSessionStatusFailed");
break;
}
}];
}
I used a reminder here, because my server is relatively weak and cannot pass too large files
-(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:@"Video %@, it will be a bit slower than 2MB. Are you sure to upload it?", sizeString];
UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil
message: message
preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil];
[[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//Delete it after canceling to avoid occupying the hard disk space of the mobile phone (sandbox) }]];
[alertController addAction:[UIAlertAction actionWithTitle:@"Sure" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[self uploadVideo:URL];
}]];
[self presentViewController:alertController animated:YES completion:nil];
}else if(sizemb>5){
message = [NSString stringWithFormat:@"Video %@, more than 5MB, cannot be uploaded, sorry.", sizeString];
UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil
message: message
preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"Sure" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil];
[[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//Delete it after canceling to avoid occupying the hard disk space of the mobile phone }]];
[self presentViewController:alertController animated:YES completion:nil];
}
}
The code uploaded in the end is based on the server, and it is also used for MKNetworking. It is said to be outdated. Please refer to it for reference. AFNet is similar, just upload NSData.
-(void)uploadVideo:(NSURL*)URL{
//[MyTools showTipsWithNoDisappear:nil message:@"Uploading..."]; NSData *data = [NSData dataWithContentsOfURL:URL];
MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"" 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:@"%@",[ 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];//Delete it after uploading to avoid occupying the hard disk space of your mobile phone; }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];
}