How to stream video as it is being recorded? - ios

Question

Okay so I'm my app i have a ViewController which handles the recording of a video from the camera which it then saves into the documents directory of my applications folders. Now what i want to do is to whilst recording the video simultaneously upload parts of the current file being written too to a server (I am new at this stuff but guessing http server). The reason I am doing this is because I wish to add support so when videoing i can stream to the chrome cast. This is possible because already the EZCast app performs a similar function.
I have already worked out how to upload video to a http server, send a video within the http server to the chrome chromecast and actually record the video using these sources :
Chrome Cast : https://developers.google.com/cast/
Chrome Cast : https://github.com/googlecast/CastVideos-ios
Http Server : https://github.com/robbiehanson/CocoaHTTPServer
Recording From Idevice camera : https://github.com/BradLarson/GPUImage
To cast a video I obviously connect but before allowing me to get to the record view I have to already be connected so my code to purely cast an .mp4 video simple looks like this :
-(void)startCasting
{
[self establishServer];
self.mediaControlChannel = [[GCKMediaControlChannel alloc] init];
self.mediaControlChannel.delegate = self;
[self.deviceManager addChannel:gblvb.mediaControlChannel];
[self.mediaControlChannel requestStatus];
NSString *path = [NSString stringWithFormat:#"http://%#%#%hu%#%#", [self getIPAddress], #":" ,[httpServer listeningPort], #"/", #"Movie.mp4"];
NSString *image;
NSString *type;
self.metadata = [[GCKMediaMetadata alloc] init];
image = #"";//Image HERE
[gblvb.metadata setString:#"
forKey:kGCKMetadataKeySubtitle];//Description Here
type = #"video/mp4";//Video Type
[self.metadata setString:[NSString stringWithFormat:#"%#%#", #"Casting " , #"Movie.mp4"]forKey:kGCKMetadataKeyTitle];//Title HERE
//define Media information
GCKMediaInformation *mediaInformation =
[[GCKMediaInformation alloc] initWithContentID:path
streamType:GCKMediaStreamTypeNone
contentType:type
metadata:gblvb.metadata
streamDuration:0
customData:nil];
//cast video
[self.mediaControlChannel loadMedia:mediaInformation autoplay:TRUE playPosition:0];
}
- (NSString *)getIPAddress {
NSString *address = #"error";
struct ifaddrs *interfaces = NULL;
struct ifaddrs *temp_addr = NULL;
int success = 0;
// retrieve the current interfaces - returns 0 on success
success = getifaddrs(&interfaces);
if (success == 0) {
// Loop through linked list of interfaces
temp_addr = interfaces;
while(temp_addr != NULL) {
if(temp_addr->ifa_addr->sa_family == AF_INET) {
// Check if interface is en0 which is the wifi connection on the iPhone
if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:#"en0"]) {
// Get NSString from C String
address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
}
}
temp_addr = temp_addr->ifa_next;
}
}
// Free memory
freeifaddrs(interfaces);
return address;
}
Now before casting i need to establish my http server. This is simple and requires small implementation after adding CocoaHTTPServer to your project. My code to start the server looks like this :
static const int ddLogLevel = LOG_LEVEL_VERBOSE;
-(void)establishServer
{
[httpServer stop];
// Do any additional setup after loading the view from its nib.
// Configure our logging framework.
// To keep things simple and fast, we're just going to log to the Xcode console.
[DDLog addLogger:[DDTTYLogger sharedInstance]];
// Create server using our custom MyHTTPServer class
httpServer = [[HTTPServer alloc] init];
// Tell the server to broadcast its presence via Bonjour.
// This allows browsers such as Safari to automatically discover our service.
[httpServer setType:#"_http._tcp."];
// Normally there's no need to run our server on any specific port.
// Technologies like Bonjour allow clients to dynamically discover the server's port at runtime.
// However, for easy testing you may want force a certain port so you can just hit the refresh button.
// [httpServer setPort:12345];
// Serve files from our embedded Web folder
NSString *webPath = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/"];
DDLogInfo(#"Setting document root: %#", webPath);
[httpServer setDocumentRoot:webPath];
[self startServer];
}
- (void)startServer
{
// Start the server (and check for problems)
NSError *error;
if([httpServer start:&error])
{
DDLogInfo(#"Started HTTP Server on port %hu", [httpServer listeningPort]);
}
else
{
DDLogError(#"Error starting HTTP Server: %#", error);
}
}
Lastly I use this code to Begin displaying and recording from the iPhones camera :
- (void)viewDidLoad
{
[super viewDidLoad];
videoCamera = [[GPUImageVideoCamera alloc] initWithSessionPreset:AVCaptureSessionPreset640x480 cameraPosition:AVCaptureDevicePositionBack];
// videoCamera = [[GPUImageVideoCamera alloc] initWithSessionPreset:AVCaptureSessionPreset640x480 cameraPosition:AVCaptureDevicePositionFront];
// videoCamera = [[GPUImageVideoCamera alloc] initWithSessionPreset:AVCaptureSessionPreset1280x720 cameraPosition:AVCaptureDevicePositionBack];
// videoCamera = [[GPUImageVideoCamera alloc] initWithSessionPreset:AVCaptureSessionPreset1920x1080 cameraPosition:AVCaptureDevicePositionBack];
videoCamera.outputImageOrientation = UIInterfaceOrientationPortrait;
videoCamera.horizontallyMirrorFrontFacingCamera = NO;
videoCamera.horizontallyMirrorRearFacingCamera = NO;
// filter = [[GPUImageSepiaFilter alloc] init];
// filter = [[GPUImageTiltShiftFilter alloc] init];
// [(GPUImageTiltShiftFilter *)filter setTopFocusLevel:0.65];
// [(GPUImageTiltShiftFilter *)filter setBottomFocusLevel:0.85];
// [(GPUImageTiltShiftFilter *)filter setBlurSize:1.5];
// [(GPUImageTiltShiftFilter *)filter setFocusFallOffRate:0.2];
// filter = [[GPUImageSketchFilter alloc] init];
filter = [[GPUImageFilter alloc] init];
// filter = [[GPUImageSmoothToonFilter alloc] init];
// GPUImageRotationFilter *rotationFilter = [[GPUImageRotationFilter alloc] initWithRotation:kGPUImageRotateRightFlipVertical];
[videoCamera addTarget:filter];
GPUImageView *filterView = (GPUImageView *)self.view;
// filterView.fillMode = kGPUImageFillModeStretch;
// filterView.fillMode = kGPUImageFillModePreserveAspectRatioAndFill;
// Record a movie for 10 s and store it in /Documents, visible via iTunes file sharing
NSString *pathToMovie = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/Movie.mp4"];
unlink([pathToMovie UTF8String]); // If a file already exists, AVAssetWriter won't let you record new frames, so delete the old movie
NSURL *movieURL = [NSURL fileURLWithPath:pathToMovie];
movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(480.0, 640.0)];
movieWriter.encodingLiveVideo = YES;
// movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(640.0, 480.0)];
// movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(720.0, 1280.0)];
// movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(1080.0, 1920.0)];
[filter addTarget:movieWriter];
[filter addTarget:filterView];
[videoCamera startCameraCapture];
}
bool recording;
- (IBAction)Record:(id)sender
{
if (recording == YES)
{
Record.titleLabel.text = #"Record";
recording = NO;
double delayInSeconds = 0.1;
dispatch_time_t stopTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(stopTime, dispatch_get_main_queue(), ^(void){
[filter removeTarget:movieWriter];
videoCamera.audioEncodingTarget = nil;
[movieWriter finishRecording];
NSLog(#"Movie completed");
// [videoCamera.inputCamera lockForConfiguration:nil];
// [videoCamera.inputCamera setTorchMode:AVCaptureTorchModeOff];
// [videoCamera.inputCamera unlockForConfiguration];
});
UIAlertView *message = [[UIAlertView alloc] initWithTitle:#"Do You Wish To Store This Footage?"
message:#"Recording has fineshed. Do you wish to store this video into your camera roll?"
delegate:self
cancelButtonTitle:nil
otherButtonTitles:#"Yes", #"No",nil];
[message show];
[self dismissViewControllerAnimated:YES completion:nil];
}
else
{
double delayToStartRecording = 0.5;
dispatch_time_t startTime = dispatch_time(DISPATCH_TIME_NOW, delayToStartRecording * NSEC_PER_SEC);
dispatch_after(startTime, dispatch_get_main_queue(), ^(void){
NSLog(#"Start recording");
videoCamera.audioEncodingTarget = movieWriter;
[movieWriter startRecording];
// NSError *error = nil;
// if (![videoCamera.inputCamera lockForConfiguration:&error])
// {
// NSLog(#"Error locking for configuration: %#", error);
// }
// [videoCamera.inputCamera setTorchMode:AVCaptureTorchModeOn];
// [videoCamera.inputCamera unlockForConfiguration];
recording = YES;
Record.titleLabel.text = #"Stop";
});
[self startCasting];
}
}
Now as you can probably see i am attempting to run the video being recorded straight after recording and pointing the server to the position. This is not working because I believe that the file is not offically located at that path until the stop button has been pressed but how can i fix this? can anybody help?
ChromeCast supported media types:
https://developers.google.com/cast/docs/media