[android-developers] Re: Android AudioRecord errors
Dimitry, if I'm not wrong, Android currently only supports AMR_NB for encoding+decoding, PCM is only supported for decoding so far. And the file encapsulating this type encoding should be 3GPP (audio/3gp is the MIME type which you may need). You can find more information about MediaRecorder in developer.android.com, take care! On 2 mar, 19:39, dmitriy325ci dmitriy.fro...@gmail.com wrote: Hi Guys, I am a newbie to android and was trying to get a simple recording application up and running. However I am facing errors and wondering if some of you can point me in the right direction. Stack Trace: 03-02 17:27:53.415: ERROR/AudioRecord(224): Could not get audio input for record source 1 03-02 17:27:53.425: ERROR/AudioRecord-JNI(224): Error creating AudioRecord instance: initialization check failed. 03-02 17:27:53.435: ERROR/AudioRecord-Java(224): [ android.media.AudioRecord ] Error code -20 when initializing native AudioRecord object. 03-02 17:27:53.487: ERROR/AudioRecord(224): Recording Failed 03-02 17:27:53.487: ERROR/AudioRecord(224): java.lang.IllegalStateException: startRecording() called on an uninitialized AudioRecord. 03-02 17:27:53.487: ERROR/AudioRecord(224): at android.media.AudioRecord.startRecording(AudioRecord.java:495) Sample Code: // Create a new AudioRecord object to record the audio. int bufferSize = AudioRecord.getMinBufferSize(AUDIO_SAMPLE_FREQUENCY_8000HZ, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT); AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, AUDIO_SAMPLE_FREQUENCY_8000HZ, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize); audioRecord.startRecording(); AndroidManifest.xml: ... uses-permission android:name=android.permission.RECORD_AUDIO/uses- permission ... System Info: Eclipse Galileo + SDK 2.1 IBM T60 running Windows XP Thanks in advance, Dmitriy -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Android AudioRecord errors
Hmmm - I was under impression that PCM was supported. I was looking to use AudioRecord instead of MediaRecorder as I can then have direct access to the buffer. Is this not a valid example/tutorial then? http://emeadev.blogspot.com/2009/09/raw-audio-manipulation-in-android.html Dmitriy -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Android AudioRecord errors
I figured out what the problem was. I was trying to start recording from 2 separate threads at the same time causing a conflict. Although I solved the issue, I am facing very poor audio quality. I tried using MediaRecorder as well with the same poor quality if not worse. I verified mic's quality via Audacity otherwise and found no issues. So it seems as if emulator might be offering poor support for audio recording. Am I missing something? If this is indeed the issue with emulator, what options do we have to create/test voice recognition applications? Dmitriy -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Android AudioRecord errors
Dimitry, I've used MediaRecorder in a Nexus One and the quality is not that great either. Maybe there's something we can do to improve quality, but I had no time to research on that. I will let you know if I make progress getting better audio quality. Take care On 3 mar, 17:25, dmitriy325ci dmitriy.fro...@gmail.com wrote: I figured out what the problem was. I was trying to start recording from 2 separate threads at the same time causing a conflict. Although I solved the issue, I am facing very poor audio quality. I tried using MediaRecorder as well with the same poor quality if not worse. I verified mic's quality via Audacity otherwise and found no issues. So it seems as if emulator might be offering poor support for audio recording. Am I missing something? If this is indeed the issue with emulator, what options do we have to create/test voice recognition applications? Dmitriy -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Android AudioRecord errors
Wow, really? One of the features of nexus one is voice search. So there is got to be a way to record audio on the device with acceptable quality. Unfortunately there is not much information available out there. So keep me posted if you make any progress. Thanks, Dmitriy On Mar 3, 3:46 pm, Matias Alberto de la Vega delavega.mat...@gmail.com wrote: Dimitry, I've used MediaRecorder in a Nexus One and the quality is not that great either. Maybe there's something we can do to improve quality, but I had no time to research on that. I will let you know if I make progress getting better audio quality. Take care On 3 mar, 17:25, dmitriy325ci dmitriy.fro...@gmail.com wrote: I figured out what the problem was. I was trying to start recording from 2 separate threads at the same time causing a conflict. Although I solved the issue, I am facing very poor audio quality. I tried using MediaRecorder as well with the same poor quality if not worse. I verified mic's quality via Audacity otherwise and found no issues. So it seems as if emulator might be offering poor support for audio recording. Am I missing something? If this is indeed the issue with emulator, what options do we have to create/test voice recognition applications? Dmitriy -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Android AudioRecord errors
Voice search is great! how Google makes the magic happen remains a mistery to me...so far at least. Take care! On Mar 4, 12:48 am, dmitriy325ci dmitriy.fro...@gmail.com wrote: Wow, really? One of the features of nexus one is voice search. So there is got to be a way to record audio on the device with acceptable quality. Unfortunately there is not much information available out there. So keep me posted if you make any progress. Thanks, Dmitriy On Mar 3, 3:46 pm, Matias Alberto de la Vega delavega.mat...@gmail.com wrote: Dimitry, I've used MediaRecorder in a Nexus One and the quality is not that great either. Maybe there's something we can do to improve quality, but I had no time to research on that. I will let you know if I make progress getting better audio quality. Take care On 3 mar, 17:25, dmitriy325ci dmitriy.fro...@gmail.com wrote: I figured out what the problem was. I was trying to start recording from 2 separate threads at the same time causing a conflict. Although I solved the issue, I am facing very poor audio quality. I tried using MediaRecorder as well with the same poor quality if not worse. I verified mic's quality via Audacity otherwise and found no issues. So it seems as if emulator might be offering poor support for audio recording. Am I missing something? If this is indeed the issue with emulator, what options do we have to create/test voice recognition applications? Dmitriy -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
