我必须首先启动录音机，这将记录音频，因为我需要录制来自摄像机的视频。
音频录制代码
NSArray *pathComponents = [NSArray arrayWithObjects:
[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject],
@"MyAudioMemo.m4a",
nil];
NSURL *outputFileURL = [NSURL fileURLWithPathComponents:pathComponents];
// Setup audio session
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayback error:nil];
// Define the recorder setting
NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
// Initiate and prepare the recorder
recorder = [[AVAudioRecorder alloc] initWithURL:outputFileURL settings:recordSetting error:nil];
recorder.delegate = self;
recorder.meteringEnabled = YES;
[recorder prepareToRecord];
[recorder record];
视频录制代码
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
[picker dismissViewControllerAnimated:YES completion:^
{
if(_isVideo)
{
NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
_imageData = [NSData dataWithContentsOfURL:videoURL];
[picker dismissViewControllerAnimated:YES completion:nil];
[ self saveVideo];
}
}];
}
-(void)saveVideo
{
if(_isVideo)
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSDateFormatter *formatter;
NSString *dateString;
formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"dd-MM-yyyy HH:mm:ss"];
dateString = [formatter stringFromDate:[NSDate date]];
NSString *path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@/%@/%@.mp4",_folderName,@"Videos",dateString]];
NSError * error = nil;
NSString *pathVideoThumb = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@/%@/%@",_folderName,@"VideoThumb",dateString]];
[_imageData writeToFile:path options:NSDataWritingAtomic error:&error];
if (error != nil)
{
NSLog(@"Error: %@", error);
return;
}
[self generateThumbImage:pathVideoThumb dataPath:path];
dispatch_async(dispatch_get_main_queue(), ^{
[MBProgressHUD hideHUDForView:self.view animated:YES];
_isVideo=NO;
videoCount++;
[videoLabel setText:[NSString stringWithFormat:@"%d %@",videoCount,@"VIDEOS"]];
[videoView setBackgroundColor:[UIColor clearColor]];
});
});
}
}
但是当我播放录制的视频时，它不包含任何声音。录制的音频工作正常，我明白问题出在音频会话上，请指导我如何使用音频会话来处理这个问题。
由于