I've been having some problems while trying to fix a simple video recording app*. I think I followed the sequence of steps correctly. The following is a simplification of the part of the code that is giving me problems. This code is executed only as a callback once a button is pressed:
if ( mRecorder != null){
mRecorder.reset();
mRecorder.release();
}
mRecorder = new MediaRecorder();
if(mViewer.hasSurface){
mRecorder.setPreviewDisplay(mViewer.holder.getSurface());
Log.d(TAG,"Surface has been set");
}
try {
Log.d(TAG,"Sleeping for 4000 mili");
Thread.sleep(4000);
Log.d(TAG,"Waking up");
} catch (InterruptedException e) {
Log.e(TAG,"InterruptedException");
e.printStackTrace();
}
mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mRecorder.setVideoFrameRate(12);
mRecorder.setVideoSize(176, 144);
mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mRecorder.setMaxDuration(MAX_DURATION_TEST);
String targetFile = "/sdcard/webcamera/temp.mp4";
File localFile = new File(targetFile);
if(localFile.exists()){
Log.d(TAG,"Local file exists");
}else{
Log.d(TAG,"Local file does not exist");
}
mRecorder.setOutputFile(targetFile);
try {
mRecorder.prepare();
bPrepared = true;
Log.i(TAG,"prepared");
return;
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
Log.e(TAG ,"IOException");
Log.e(TAG,"Message: "+e.getMessage());
StackTraceElement[] array = e.getStackTrace();
for(StackTraceElement element : array){
Log.e(TAG,""+element.toString());
}
}
The important thing which I don't understand here is that whenever I put the video encoder to be MPEG_4_S it works. On the other hand whenever I put the encoder to be H264 it just does not. The problem is that this piece of code is just part of a bigger project, and the rest of it kind of expects this video to be encoded with h264.
I'm testing on a samsung Galaxy I-7500, running on froyo by the way. And I think the Galaxy I-9000 has the same problem.
The puzzling thing for me is that according to this documentation right here:
http://developer.android.com/guide/appendix/media-formats.html, MPEG_4_SP encoding should not be supported at all, while H264 is supported since honeycomb. So why is it working with MPEG_4_SP at all? and is it possible to make it work with H264?
The error I get is not really clear.
07-11 00:01:40.626: ERROR/MediaSource(1386): Message: prepare failed.
07-11 00:01:40.766: ERROR/MediaSource(1386): android.media.MediaRecorder._prepare(Native Method)
07-11 00:01:40.766: ERROR/MediaSource(1386): android.media.MediaRecorder.prepare(MediaRecorder.java:508)
07-11 00:01:40.766: ERROR/MediaSource(1386): com.appdh.webcamera.MediaSource.prepareOutput(MediaSource.java:74)
07-11 00:01:40.766: ERROR/MediaSource(1386): com.appdh.webcamera.MainActivity.startDetectCamera(MainActivity.java:312)
*Actually, the app is a little more complicated than just that, as it also does stream the video over LAN, but the part which I am concerned here has nothing to do with that. You can check this interesing project out here: http://code.google.com/p/ipcamera-for-android/
As you already wrote H.264 encoding support can be only expected from devices running honeycomb and later, which currently means only tablets. If you need H.264 you should test for prepare failed and either tell the user that the device is not supported or better block devices without H.264 using market filters. Or you can compile ffmpeg for android - like several other projects do. Have a look at these links:
http://odroid.foros-phpbb.com/t338-ffmpeg-compiled-with-android-ndk
http://bambuser.com/opensource
FFmpeg on Android
You also can use JCodec
It supports Android and have few samples for it.
The best way to compile it with Gradle is:
compile 'com.github.jcodec:jcodec:0.2.0-vg4'
but for latest improvements and bug fixes you need to compile from latest commits (there is still no new release from 2016)
Related
I wanted to record and pass through the recorded sound to the phone's speaker, but I could not get the recording code to work (app crashes, SEE MY ATTEMPT HERE) so I am now trying to see if the emulator can do anything related to audio or not. I copied a 1 sec recording, in both wav (16 bit pcm, 44k sampling frequency, mono) and mp3 (recording and conversion both done through Audacity) to the sdcard. I can see the files in the IDE's file explorer, so I guess the sdcard is being properly detected by the emulator. But I could not get the emulator's built in music player to detect them (Why ??).
As a second attempt, I copied the code HERE to the sample hello world Android app. Here's the main activity class
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// String PATH_TO_FILE = "/sdcard/asMP3.mp3";
// String PATH_TO_FILE = Environment.getExternalStorageDirectory().getPath()+"/asMP3.mp3";
String PATH_TO_FILE = Environment.getExternalStorageDirectory().getPath()+"/wavSigned16bitPCM.wav";
MediaPlayer mp1 = new MediaPlayer();
try
{
mp1.setDataSource(PATH_TO_FILE);
mp1.prepare();
mp1.start();
Toast.makeText(getApplicationContext(), "HERE", Toast.LENGTH_SHORT).show();
}
catch (IllegalArgumentException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IllegalStateException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
I assumed this would start playing the sound as soon as the app starts. The Toast shows up so I know the code is executing. The program does not crash but nothing else happens either, no sound in this case as well (Why ?)
As a third attempt, I used the code HERE, and added the files I wanted to play in res\raw as it says. This program does not crash either, but I still cannot hear anything.
So the question is, is it possible to do anything at all related to audio, on the emulator? Looking at THIS QUESTION it looks like this should be possible, so why isn't it happening in my program? Do I need to set any permissions int he manifest for audio output as well?
----EDIT----
I have also seen THIS, but if I use the -useaudio option the emulator just says -useaudio is an unknown option, and emulator -help does not list it, hen it is clearly shown as an option in the developers website and moreover it says that useaudio is enabled by default. So why isn't my emulator playing any sound?
--- UPDATE ---
It seems the audio features do not work if the emulator has been started using a snapshot. If not, the audio feature still may or may not work depending on the computer. Please see HERE
Yes, you can do audio related work on emulator.
Your code sequence should be -
mp1 = new MediaPlayer();
mp1.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp1.setDataSource(PATH_TO_FILE);
mp1.prepare();
mp1.start();
And for setting permissions in the manifest file.
Use these for record feature-
and these for playing feature -
There is a guide article on official android developer website
Guide to audio capture and
Guide to media playback
and if it dosn't work, then post your log cat screenshot.
On Android 2.2 the code works fine on 2.3 it crashes at MediaRecorder.start() though. The log and the code itself is below. As you see it doesn't give much information, log gives "start failed -2147483648" message. I've been trying for ages and can't figure this one out, what am I doing wrong?
mediaRecorder = new MediaRecorder();
try {
camera.unlock();
mediaRecorder.setCamera(camera);
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
mediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString());
mediaRecorder.setPreviewDisplay(cameraPreview.getHolder().getSurface());
mediaRecorder.prepare();
mediaRecorder.start(); // thats the line code fails
fightTimer.start();
}
catch (RuntimeException ex) {
Toast.makeText(this,"Sorry, camera is currently not available"+ex.toString(), 2000).show();
}
catch (IOException ex) {
Toast.makeText(this,"Sorry, camera is currently not available"+ex.toString(), 2000).show();
}
and log
08-13 06:34:56.914: I/MediaRecorderJNI(2256): prepare: surface=0x2bb230 (identity=13)
08-13 06:34:57.764: E/MediaRecorder(2256): start failed: -2147483648
That's just a bad error code. However, the first line prepare: surface indicates something related to constructing the VideoPlayer bounds and suddenly an exception occurs.
Do you need to setVideoSize(), maybe?
TIP: I'd search for "android mediarecorder start failed" (without the error code - it seems like those error codes are just as random as the error message itself! )
EDIT:
Since it works on Android 2.2, did you look at the API changes between API 2.2 and API 2.3 for MediaRecorder?
I am using the following library to stream YouTube videos to an Android application.
http://code.google.com/p/android-youtube-player/source/browse/trunk/OpenYouTubeActivity/src/com/keyes/youtube/OpenYouTubePlayerActivity.java?r=3
I am successfully able to play videos on HTC and Motorola phones over 3G and Wifi. However, on Samsung Galaxy (Epic 4G) and Samsung Galaxy II phones I am only able to play using Wifi. 3G gives me this error: "Cannot play video. Sorry this video cannot be played."
I have tried forcing low quality YouTube streaming, but this did not help. I see in my log that Start() is being called in both cases (3G/Wifi). Is this an issue with VideoView? Is there a workaround?
Edit 2
The videos are coming from YouTube API. I have attempted using embedded and normal streams, as well as lowest quality stream available (varying per video). Also, I do not think it is an encoding issue since the same videos play correctly using Wifi.
Edit 1
I also receive the following output regardless of wether video plays using Wifi or does not using 3G.
01-30 15:22:38.305: E/MediaPlayer(3831): error (1, -1)
01-30 15:22:38.305: E/MediaPlayer(3831): callback application
01-30 15:22:38.305: E/MediaPlayer(3831): back from callback
01-30 15:22:38.309: E/MediaPlayer(3831): Error (1,-1)
According to this Link, these errors means the following (I think):
/*
Definition of first error event in range (not an actual error code).
*/
const PVMFStatus PVMFErrFirst = (-1);
/*
Return code for general failure
*/
const PVMFStatus PVMFFailure = (-1);
/*
/*
Return code for general success
*/
const PVMFStatus PVMFSuccess = 1;
/*
Further adding confusion.
Yes, as you are thinking, this is a issue in VideoView, similar issues also appear in MediaPlayer, and I've encountered similar and strange issues as you did, I had problems when the video was played only on 3G and not on Wi-Fi. This usually happens on 2.1 and some 2.2 devices, but not on higher API levels as I've seen so far.
So what I can recommend is do the following :
First check if the running device may be one that can have issues, something like this :
//Define a static list of known devices with issues
static List sIssueDevices=Arrays.asList(new String[]{"HTC Desire","LG-P500","etc"});
if(Build.VERSION.SDK_INT<9){
if(sIssueDevices.contains(Build.Device){
//This device may have issue in streaming, take appropriate actions
}
}
So this was the simplest part, to detect if the running device may have issues in streaming the video. Now, what I did and may also help you, is buffer the video from Youtube in a file on the SDCard and set that file as the source for your VideoView. I will write some code snippets to see how my approach was :
private class GetYoutubeFile extends Thread{
private String mUrl;
private String mFile;
public GetYotubeFile(String url,String file){
mUrl=url;
mFile=file;
}
#Override
public void run() {
super.run();
try {
File bufferingDir=new File(Environment.getExternalStorageDirectory()
+"/YoutubeBuff");
File bufferFile=new File(bufferingDir.getAbsolutePath(), mFile);
//bufferFile.createNewFile();
BufferedOutputStream bufferOS=new BufferedOutputStream(
new FileOutputStream(bufferFile));
URL url=new URL(mUrl);
URLConnection connection=url.openConnection();
connection.setRequestProperty("User-Agent", "Mozilla");
connection.connect();
InputStream is=connection.getInputStream();
BufferedInputStream bis=new BufferedInputStream(is,2048);
byte[] buffer = new byte[16384];
int numRead;
boolean started=false;
while ((numRead = bis.read(buffer)) != -1 && !mActivityStopped) {
//Log.i("Buffering","Read :"+numRead);
bufferOS.write(buffer, 0, numRead);
bufferOS.flush();
mBuffPosition += numRead;
if(mBuffPosition>120000 &&!started){
Log.e("Player","BufferHIT:StartPlay");
setSourceAndStartPlay(bufferFile);
started=true;
}
}
Log.i("Buffering","Read -1?"+numRead+" stop:"+mActivityStopped);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void setSourceAndStartPlay(File bufferFile) {
try {
mPlayer.setVideoPath(bufferFile.getAbsolutePath());
mPlayer.prepare();
mPlayer.start();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
Another issue will arise when the VideoView has stopped playing before the end of file, because not enough was buffered in the file. For this you need to set an onCompletionListener() and if you are not at the end of the video, you should start again the video playback from the last position :
public void onCompletion(MediaPlayer mp) {
mPlayerPosition=mPlayer.getCurrentPosition();
try {
mPlayer.reset();
mPlayer.setVideoPath(
new File("mnt/sdcard/YoutubeBuff/"+mBufferFile).getAbsolutePath());
mPlayer.seekTo(mPlayerPosition);
mPlayer.start();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
In the end, of course the GetYoutubeFile thread is started in the onCreate() method :
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//init views,player,etc
new GetYoutubeFile().start();
}
Some modifications and adaptation I think will have to be done for this code, and it may not be the best approach, but it helped me, and I couldn't find any alternative.
I have tackle with this problem in my own way.First every time read your log cat.If you got
Error (1,-1)
that means you will get sorry,this video can not play message.So in this case finish that activity, give custom progress bar and download video.Then after downloading save it in temporary folder then play it.After playing delete that folder.
To reading log cat---
try {
Process process = Runtime.getRuntime().exec("logcat -d");
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(process.getInputStream()));
StringBuilder log=new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
log.append(line);
}
} catch (IOException e) {
}
Read this answer too. although it is just user experience not linked to app.but it happens sometimes in default application also
Heaps of videos, even if I have full 3G network coverage, will say "Sorry, this video cannot be played". One day, I got so pissed off with it, I just kept pressing 'Okay' to dismiss the message, and then pressed the video again only to see the "Sorry, this video cannot be played" message again. I repeated this process (in my blind anger), but eventually, after about 5 tries, the video decided to miraculously play!
This method pretty much works for me every time. Most videos won't want to play the first time, but eventually if I am just persistent, and keep telling it to play even though it tells me it 'can't' play the video, it will play! Although, some videos i've had to press 'Okay', press the video, press 'Okay', press the video etc... for like 20 times before it actually decided to play. Those times, I have been incredibly close to getting my phone and throwing it down on the floor because of how shitty I am with how youtube won't work.
I wish there was a way to fix this problem. No one seems to have come up with a solution. Everyone just says "oh yeah I have the same problem" but no one contributes anything. GOOGLE, SOLVE THIS PROBLEM ON YOUR PHONES. THIS SEEMS TO BE HAPPENING WORLDWIDE, ON A RANGE OF ANDROID PHONES.
This message often cames from the inappropriate encoding of the video ("Cannot play video. Sorry this video cannot be played.") I was struggling with videoview for a while , now the correct encoded videos play on all tested devices, even when using Wifi or 3G. Let em know if you want to know how to encode the videos. And for streaming the videos I used the demo from android sdk apis and it works flawless.
I am writing an application that uses MediaRecorder for recording audio. ( I use Android 2.1 )
Before start recording I want to know the microphone's state (is it busy or no)?
If the microphone busy, can I get exclusive access to it?
Thanks in advance!
Answer to 1 question:
After reading many articles I realized that it was impossible.
It's an old question but I show the way I solve this problem. Maybe someone will need this help. Note: it's a dirty way but it worked for me.
You can try/catch MediaRecorderObject.start(). You will get an exception if the mic is busy
MediaRecorder myAudioRecorder = new MediaRecorder();
myAudioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myAudioRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
myAudioRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
myAudioRecorder.setOutputFile(outputFile);
try {
myAudioRecorder.prepare();
myAudioRecorder.start();
}
catch (Exception exception) {
Toast.makeText(getApplicationContext(), "Mic in use", Toast.LENGTH_LONG).show();
}
I'm trying to create an audio streamer with Android's MediaPlayer. It's just fine if it doesn't work with Android 2.1 or bellow. I need to be able to play the audio from a SHOUTcast stream. Here's my code:
player = new MediaPlayer();
try {
player.setDataSource("http://87.230.103.107:8000");
player.prepareAsync();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
player.start();
For some reason, this code will play just nothing. I think it may be related to the app permissions. Does anyone know what's going on?
Thanks!
[UPDATE]
I'm getting the following errors:
04-25 23:35:15.432: ERROR/MediaPlayer(283): start called in state 4
04-25 23:35:15.432: ERROR/MediaPlayer(283): error (-38, 0)
04-25 23:35:15.602: ERROR/MediaPlayer(283): Error (-38,0)
04-25 23:35:17.542: INFO/AwesomePlayer(33): calling prefetcher->prepare()
04-25 23:35:18.547: INFO/Prefetcher(33): [0x17650] cache below low water mark, filling cache.
04-25 23:35:18.762: INFO/AwesomePlayer(33): prefetcher is done preparing
04-25 23:35:19.769: ERROR/AwesomePlayer(33): Not sending buffering status because duration is unknown.
Sorry for the late response, ran across this while looking for answers to another problem.
If you still need an answer, you're calling start() while it's still being prepared. PrepareAsync() returns immediately, unlike prepare(). The problem with using 'prepare()` with streams is that it will block until it has enough data to start play.
What you want to do is set an OnPreparedListener, and have the start() called from there.
The problem is that content type "audio/aacp" streaming is not supported directly . Some decoding library can be sued to play "aacp", please see the solution below:
Freeware Advanced Audio (AAC) Decoder for Android
How to use this library?
For more detail please see this.
Consider legal issues while using it.
the project http://code.google.com/p/aacplayer-android/ is licensed
under GPL, so you can create commercial apps * on top of it, but you
need to fullfill the GPL - mainly it means to publish your code as
well. * If you use the second project
http://code.google.com/p/aacdecoder-android/ , then you do not need to
publish your * code (the library is licensed under LGPL).
1)Avoid using prepare(), use prepareAsyc() instead. (or) put your playing logic in a worked thread or a separate thread. 1)Avoid using player.prepare(), instead use player.prepareAsync();
(or) keep the logic in a separate thread. (you can use intent service, AsyncTask,etc)
2)Also try with static constructor MediaPlayer.create(Uri);