audio-recording

My app features a button to record audio (and another to play it back when the recording is over). I send the recorded audio files on a server. On Android the files is recorded as .amr (mime type audio/amr) and can be played back. On iOS however the file can neither be played back on the device (iPhone 4 or 4S) nor on a computer. ffmpeg -i reports [mov,mp4,m4a,3gp,3g2,mj2 @ 0x2fac120] moov atom not found 9gMjOnnmsj9JJZR3.m4a: Invalid data found when processing input Please note that VLC cannot play it either. I give the m4a extension because Voice recorder uses it (along with aac codec). Here

I am working on audio recording. I am able to record my audio in caf (Core audio format). Now I want to record sound in .mp3 or .amr . I tried a lot of google but didn't found anything. I am not sure if my steps following work: Write that Audio with .caf extention to document dir Read data from that file write the file again with .mp3 or .amr extention I have 100% doubt that this will not going to work as this will just re save file with some other extension. This won't change audio codec. I thought that for converting any format whether it is audio or video we need to change its codecs and

I am making an app which needs to stream audio to a server. What I want to do is to divide the recorded audio into chunks and upload them while recording. I used two recorders to do that, but it didn't work well; I can hear the difference between the chunks (stops for couple of milliseconds). How can I do this? Your problem can be broken into two pieces: recording and chunking (and uploading, but who cares). For recording from the microphone and writing to the file, you can get started quickly with AVAudioEngine and AVAudioFile . See below for a sample, which records chunks at the device's

I have the settings shown below. I want change audio recording settings to 16Khz and 16 bit when we record audio. NSArray *dirPaths; NSString *docsDir; dirPaths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES); docsDir = [dirPaths objectAtIndex:0]; NSString *soundFilePath = [docsDir stringByAppendingPathComponent:@"sound.wav"]; NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath]; NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:AVAudioQualityMin], AVEncoderAudioQualityKey, [NSNumber numberWithInt:16],

I am trying to record audio in my app on a LG G Watch. The following code throws RuntimeException with message "start failed: -2147483648" at the statement "recorder.start();". Wondering what I'm doing wrong here. I have tried a lot of different set of parameters, for example for AudioSource: recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); //-and- recorder.setAudioSource(MediaRecorder.AudioSource.MIC); Also for OutputFormat I have tried recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); //-and- recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); //-and- recorder

I have seen multiple questions on SO that say it is impossible to see when another app wants to use the microphone ( Unable to access microphone when another app is using it in Android ). However, I know it is possible because Shazam has an "Auto" function that allows the exact functionality I want: to continuously listen to audio when other apps are not using the microphone. Currently, when I use my app and use an app like Snapchat, I am unable to record a video with audio because Snapchat does not take the mic over. However, as I said before, in this case Shazam's Auto feature works fine. So