Video recording in iOS programmatically

Question

I am trying to implement functionality like below

Final Recorded Video = \"Capture a video from front camera + Record an audio

Answer 1

// Add some extra code for following methods "1st Method"

  -(void) playMovieAtURL: (NSURL*) theURL

    {
       [player play];
       AVAudioSession *audioSession = [AVAudioSession sharedInstance];
       NSError *err = nil;
       [audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err];
     if(err)
      {
        NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo]     description]);
        return;
    }
       [audioSession setActive:YES error:&err];
       err = nil;
    if(err){
        NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
        return;
    }

       recordSetting = [[NSMutableDictionary alloc] init];

      [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
      [recordSetting setValue:[NSNumber numberWithFloat:16000.0] forKey:AVSampleRateKey];
      [recordSetting setValue:[NSNumber numberWithInt: 1] forKey:AVNumberOfChannelsKey];
      recorderFilePath = [NSString stringWithFormat:@"%@/MySound.caf", DOCUMENTS_FOLDER];
     NSLog(@"recorderFilePath: %@",recorderFilePath);
     audio_url = [NSURL fileURLWithPath:recorderFilePath];
    err = nil;
    NSData *audioData = [NSData dataWithContentsOfFile:[audio_url path] options: 0 error:&err];
    if(audioData)
    {
        NSFileManager *fm = [NSFileManager defaultManager];
        [fm removeItemAtPath:[audio_url path] error:&err];
    }

    err = nil;
    recorder = [[ AVAudioRecorder alloc] initWithURL:audio_url settings:recordSetting error:&err];
    if(!recorder)
    {
        NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
        UIAlertView *alert =
        [[UIAlertView alloc] initWithTitle: @"Warning"
                                   message: [err localizedDescription]
                                  delegate: nil
                         cancelButtonTitle:@"OK"
                         otherButtonTitles:nil];
        [alert show];
        return;
    }

    //prepare to record
    [recorder setDelegate:self];
    [recorder prepareToRecord];
    recorder.meteringEnabled = YES;

    BOOL audioHWAvailable = audioSession.inputAvailable;
    if (! audioHWAvailable)
    {
        UIAlertView *cantRecordAlert =
        [[UIAlertView alloc] initWithTitle: @"Warning"
                                   message: @"Audio input hardware not available"
                                  delegate: nil
                         cancelButtonTitle:@"OK"
                         otherButtonTitles:nil];
        [cantRecordAlert show];
        return;
    }


}

// 2nd method

-(void) stopVideoRecording

    {
    [player.view removeFromSuperview];
    [player stop];
    [movieFileOutput stopRecording];

    AVURLAsset* audioAsset = [[AVURLAsset alloc]initWithURL:audio_url options:nil];
    AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:outputURL options:nil];

    mixComposition = [AVMutableComposition composition];

    AVMutableCompositionTrack *compositionCommentaryTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio
                                                                                        preferredTrackID:kCMPersistentTrackID_Invalid];
    [compositionCommentaryTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, audioAsset.duration)
                                        ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]
                                         atTime:kCMTimeZero error:nil];

    AVMutableCompositionTrack *compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
                                                                                   preferredTrackID:kCMPersistentTrackID_Invalid];
    [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
                                   ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]
                                    atTime:kCMTimeZero error:nil];

    AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition
                                                                          presetName:AVAssetExportPresetPassthrough];

    AVAssetTrack *videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
    [compositionVideoTrack setPreferredTransform:videoTrack.preferredTransform];
}

// Final Play Video

AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:mixComposition];
AVPlayer *player1 = [AVPlayer playerWithPlayerItem:playerItem];
AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:player1];
[playerLayer setFrame:CGRectMake(0, 0, 320, 480)];
[[[self view] layer] addSublayer:playerLayer];
playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
[player1 play];
player1.actionAtItemEnd = AVPlayerActionAtItemEndNone;