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我的應用程序模擬FaceTime調用,同時通過前置攝像頭記錄使用它的人,並在屏幕上顯示它的預覽,就好像它是一個真正的FaceTime調用。然後在FaceTime調用中播放預錄製的視頻作爲「其他人」。當按下「結束」按鈕或主動片結束時,應該將視頻從前置攝像頭保存下來。在前者中,它工作得很完美,但是如果主電影運行完成,電影的保存輸出就沒有音頻。任何想法是怎麼回事?iOS中的AVCapture Session中沒有音頻
#import "MovieView.h"
#import <AudioToolbox/AudioToolbox.h>
@implementation MovieView
@synthesize selectedCountry, vImagePreview, playit;
- (void)viewDidLoad {
[super viewDidLoad];
NSDate *today = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MMM d hh:mm:ss a"];
// display in 12HR/24HR (i.e. 11:25PM or 23:25) format according to User Settings
NSString *currentTime = [dateFormatter stringFromDate:today];
self.navigationController.navigationBarHidden = YES;
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];
[[UIApplication sharedApplication] setStatusBarHidden:NO];
NSError* error4 = nil;
AVAudioSession* audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryAmbient error:&error4];
OSStatus propertySetError = 0;
UInt32 allowMixing = true;
propertySetError |= AudioSessionSetProperty(kAudioSessionProperty_OtherMixableAudioShouldDuck, sizeof(allowMixing), &allowMixing);
// Activate the audio session
error4 = nil;
if (![audioSession setActive:YES error:&error4]) {
NSLog(@"AVAudioSession setActive:YES failed: %@", [error4 localizedDescription]);
}
//tests
// Set audio session category to "play and record"
//endtests
//this is the end of recording the video and audio
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryPath = [paths objectAtIndex:0];
NSString *proud = [[documentsDirectoryPath stringByAppendingPathComponent:@"proud"] stringByAppendingPathComponent:selectedCountry];
NSURL *movieURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"BlueHarvest" ofType:@"mp4"]];
player =
[[MPMoviePlayerController alloc] initWithContentURL: movieURL];
player.useApplicationAudioSession=YES;
[player prepareToPlay];
player.controlStyle = MPMovieControlStyleNone;
player.allowsAirPlay = NO;
player.scalingMode = MPMovieScalingModeFill;
player.view.frame = self.view.frame;
[self.view insertSubview:player.view belowSubview:vImagePreview];
[player setFullscreen:YES animated:YES];
// ...
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(movieFinishedCallback:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:player];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(exitedFullscreen:) name:MPMoviePlayerDidExitFullscreenNotification object:player];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(moviePlayerWillExitFullscreen:)
name:MPMoviePlayerWillExitFullscreenNotification
object:player];
[player play];
session = [[AVCaptureSession alloc] init];
[session beginConfiguration];
session.sessionPreset = AVCaptureSessionPresetMedium;
CALayer *viewLayer = self.vImagePreview.layer;
NSLog(@"viewLayer = %@", viewLayer);
self.captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
self.captureVideoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
self.captureVideoPreviewLayer.frame = self.vImagePreview.bounds;
[self.captureVideoPreviewLayer setCornerRadius:14];
[self.captureVideoPreviewLayer setBorderWidth:3.0];
[self.captureVideoPreviewLayer setBorderColor:[[UIColor whiteColor] CGColor]];
self.captureVideoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientationLandscapeRight;
[[vImagePreview layer] setCornerRadius:14];
[[vImagePreview layer] setBorderWidth:3.0];
[[vImagePreview layer] setBorderColor:[[UIColor whiteColor] CGColor]];
[self.vImagePreview.layer addSublayer:self.captureVideoPreviewLayer];
AVCaptureDevice *device = [self frontFacingCameraIfAvailable];
NSError *error = nil;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
if (!input) {
// Handle the error appropriately.
NSLog(@"ERROR: trying to open camera: %@", error);
}
AVCaptureDevice *audioCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
NSError *error2 = nil;
AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioCaptureDevice error:&error2];
AVCaptureMovieFileOutput *movieFileOutput = [[AVCaptureMovieFileOutput alloc] init];
NSString *archives = [documentsDirectoryPath stringByAppendingPathComponent:@"archives"];
NSString *editedfilename = [[selectedCountry lastPathComponent] stringByDeletingPathExtension];
NSString *datestring = [[editedfilename stringByAppendingString:@" "] stringByAppendingString:currentTime];
NSLog(@"%@", datestring);
NSString *outputpathofmovie = [[archives stringByAppendingPathComponent:datestring] stringByAppendingString:@".mp4"];
NSURL *outputURL = [[NSURL alloc] initFileURLWithPath:outputpathofmovie];
[session addInput:input];
[session addInput:audioInput];
[session addOutput:movieFileOutput];
AVCaptureConnection *videoConnection = nil;
for (AVCaptureConnection *connection in [movieFileOutput connections])
{
NSLog(@"%@", connection);
for (AVCaptureInputPort *port in [connection inputPorts])
{
NSLog(@"%@", port);
if ([[port mediaType] isEqual:AVMediaTypeVideo])
{
videoConnection = connection;
}
}
}
if([videoConnection isVideoOrientationSupported]) // **Here it is, its always false**
{
[videoConnection setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
}
[session commitConfiguration];
[session startRunning];
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[movieFileOutput startRecordingToOutputFileURL:outputURL recordingDelegate:self];
NSLog(@"OutputURL%@", outputURL);
}
-(void)viewDidLayoutSubviews {
[super viewDidLayoutSubviews];
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
switch (orientation) {
case UIInterfaceOrientationPortrait:
[self.captureVideoPreviewLayer.connection setVideoOrientation:AVCaptureVideoOrientationPortrait];
break;
case UIInterfaceOrientationPortraitUpsideDown:
[self.captureVideoPreviewLayer.connection setVideoOrientation:AVCaptureVideoOrientationPortraitUpsideDown];
break;
case UIInterfaceOrientationLandscapeLeft:
[self.captureVideoPreviewLayer.connection setVideoOrientation:AVCaptureVideoOrientationLandscapeLeft];
break;
case UIInterfaceOrientationLandscapeRight:
[self.captureVideoPreviewLayer.connection setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
break;
}
}
- (void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error {
//finished
NSLog(@"ErrorMessage%@", error);
}
-(IBAction)endcall {
[player stop];
[session stopRunning];
}
-(AVCaptureDevice *)frontFacingCameraIfAvailable
{
NSArray *videoDevices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
AVCaptureDevice *captureDevice = nil;
for (AVCaptureDevice *device in videoDevices)
{
if (device.position == AVCaptureDevicePositionFront)
{
captureDevice = device;
break;
}
}
// couldn't find one on the front, so just get the default video device.
if (! captureDevice)
{
captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
}
return captureDevice;
}
- (void) movieFinishedCallback:(NSNotification*) aNotification {
NSLog(@"MovieDone");
[player stop];
[player.view removeFromSuperview];
[[NSNotificationCenter defaultCenter]
removeObserver:self
name:MPMoviePlayerPlaybackDidFinishNotification
object:player];
[session stopRunning];
[self.navigationController popToRootViewControllerAnimated:NO];
}
- (void) exitedFullscreen:(NSNotification*) aNotification {
NSLog(@"MovieDone");
[player.view removeFromSuperview];
[[NSNotificationCenter defaultCenter]
removeObserver:self
name:MPMoviePlayerDidExitFullscreenNotification
object:player];
}
- (void)moviePlayerWillExitFullscreen:(NSNotification*) aNotification {
[player stop];
[session stopRunning];
[self dismissMoviePlayerViewControllerAnimated];
[[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerWillExitFullscreenNotification object:player];
}
@end