I try to use the MediaRecorder class to record a video but I get an exception : failed to get Camera parameters. Prepare failed.
Here's my code :
CODE:.....................
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Is there a way to get the best quality of video recording possible using MediaRecorder? the camcorder app does a lot better in terms of quality.
View 5 Replies View RelatedI have a question regarding the Android MediaRecorder -
My test device
HTC Desire HD
Firmware 2.3.5
I want to write an app, which records a video. This should be implementet via the MediaRecorder (not via Intents). On the Google-Developers site I found a "tutorial" [URL]
My problem:
I followed the whole tutorial. When I'm starting my application on my test device it throws an exception ("start failed") at recorder.start() if I set the quality to high (CamcorderProfile.QUALITY_HIGH). If I change the setting to QUALITY_LOW the app starts recording for 1-2 seconds. After that the screen freezes and my LogCat tracks the following errors:
media server died!
camera server died
ICamera died
I also get ERROR 100
I'm trying to use android.media.MediaRecorder to record video, and no matter what I do the android runtime segmentation faults when I call prepare().
Here's an example:
CODE:....................
I am trying to use the MediaRecorder to record audio. I read the documentation at http://developer.android.com/reference/android/media/MediaRecorder.html on how to use the MediaRecorder and then tried the sample code given in the documentation for recording audio which is:
MediaRecorder recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setOutputFile(PATH_NAME); recorder.prepare(); recorder.start(); // Recording is now started ... recorder.stop(); recorder.reset(); // You can reuse the object by going back to setAudioSource() step recorder.release(); // Now the object cannot be reused
However this code doesn't seem to work. The second line throws an exception when I execute the code. If I execute the following two lines of code:
MediaRecorder recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
It throws a RuntimeException on the call to setAudioSource with the exception message "setAudioSource failed." I am running this on my T- Mobile HTC G1 Android device which is running Android v1.6
I have searched a number of forums for entries about "MediaRecorder" or "setAudioSource" and have found that a number of other people have also posted that they are having a similar problem. However no one has responded to any of the posts which I found regarding this issue.
I would appreciate some help if anyone knows why the MediaRecorder is not working as documented or can provide information on how to get past this exception.
Does anyone know how to use the MediaRecorder to API to capture video?
I am writing an application where I want to be able to capture video. I am trying to use the MediaRecorder API in 1.5, which is supposed to support video capture. However, there are no examples in the documentation on how to use this API for video (only for audio, and that works perfect). Basically what I do is the following:
CODE:...............
This gives me the following error: E/CameraInput( 37): No surface is available for display E/MediaRecorder( 7609): prepare failed: -2147483648
OK, so I have to have a surface to preview the video? Could be useful I guess, but not something I really need.
Could I use the VideoView widget for this, or is that only for playback?
Or am I supposed to use a SurfaceView to preview the video? I saw someone use that to capture images, but they used android.hardware.Camera to open the camera and capture a frame, and did not use MediaRecorder.
HOw to capture video, or even better have some example code?
I want to get the stream and send it to server directly by using MediaRecorder.
Actually, I am able to record the video,and able to store it into sdcard. Now I want to it to stream (live stream) to server rather than storing it.
I'm using MediaRecorder.setOutputFile(FileDescriptor fd) over a UNIX socket, so that local code on the device can see the encoded stream in real time (for video streaming out).
What I observed is that the encoder doesn't write encoded frames continuously, when they are produced, but by "bursts", exactly one second apart. I tried both containers (THREE_GPP and MPEG_4) and all three available codecs (MPEG_4_SP, H263, H264), the behavior is always the same. This one-second period is notably unrelated to framerate or bitrate, so it is not flushing by size; rather, it seems to be flushing by time (possibly to mask SD card write overheads ? Bummer, I 'm not using the SD here !). Is it a known limitation ? Is there a known workaround ?
Dear PV engineer: I have try several days for this. We want to add video conference function in PV opencore, so we need to create video capture node in native mode, I try the following code to capture video, My code is like this:
CODE:......................
When I record video by MediaRecorder, it always records in landscape mode, regardless of real device orientation. How to force MediaRecorder/Camera use real orientation ?
View 1 Replies View RelatedI am writing an application and due to various reasons I had to build it using make (froyo code) and not SDK. When I run my app on emulator it works fine. I have an Android device and code to build image for the device. When I build my app with device code, it builds fine. How ever, when I run the application, I get
java.lang.ClassNotFoundException:
<package.class> in loader dalvik.system.PathClassLoader[.]
A source file in my code is actually doing
sourceClass = classLoader.loadClass(sourceName);
sourceName here is pointing to a class I actually build (I have classname.java file in my code under correct package directory and package name). Note that this app is running fine on emulator, but on a device it is failing.
I verified that the .class file exists in out/target/common/obj/APPS/ xxxApp_intermediates/classes.jar, classes-full-debug.jar, classes-full- names.jar
I resolved this issue myself. It turns out that the activation framework requires some libraries that aren't native to android, myjava.awt.datatransfer, org.apache.harmony.awt.*, and org.apache.harmony.misc. Once i added those libraries everything worked fine. Code...
View 2 Replies View RelatedI'm new in Android development and I have the next question/problem. I'm playing around with the Media Recorder class to record just audio from the microphone. I'm following the steps indicated in the official ://developer.android.com/reference/android/media/MediaRecorder.html
So I have a method that initializes and configure the Media Recorder object in order to start recording. Here you have the code:
//initializes audio recorder
//configure the input sources
mrecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
//set the output format
mrecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
//set the audio encoding
mrecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT)
I am building a camera app, where videos are continuously being captured and saved to the SD card. The videos are short (few minutes), and their length are preset with setMaxDuration().
The whole process works fine, while the main activity is in the foreground. But, when I go to another activity (e.g. settings), the video recording works in the background only until max duration is reached. The file is saved, but a new sequence can not be started
because prepare() fails, apparently because setPreviewDisplay() doesn't like not having a proper surface to attach to.
I tried to use a dummy Surface, a dummy SurfaceHolder, lockCanvas(), and various other tricks, but nothing works. Is there a way to initialize MediaRecorder without a valid surface?
The error I receive is, "android.content.ActivityNotFoundException: Unable to find explicit activity class {com.droidea.birthday/ EditBirthdayActivity}; have you declared this activity in your AndroidManifest.xml?"
The error seems simple enough, but I don't see a problem with the way I have identified this activity in my manifest file. I have also been unable to see any problems with the activity class itself..............
I get this exception when I try to inflate
07-22 19:15:39.903: ERROR/AndroidRuntime(3810): Caused by: java.lang.ClassCastException: android.widget.RelativeLayout
I have a base class:
public class UIBase extends RelativeLayout {}
And a more specific class:
public class Countdown extends UIBase {}
Then I try to inflate and it exceptions:
UIBase newView = (UIBase) inflater.inflate(layoutId, parent, true);
Here's the XML file:
CODE:..................
My app crashes with a null pointer exception on the code below. I have an xml preference file under res/xml/defaults.xml
public class Preference extends Activity {
public Preference() {
} public String getPreference(String key)
{ //it still crashes here
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this.getApplicationContext());
String result = settings.getString(key, null); return result;
} }
I'm testing how my app behaves when killed by the OS due to low memory conditions. I always have three activities on the stack, like: A B C (then C launches maps or some other heavy process)
when my app is killed, and I return to it, C starts itself up again ok. When I hit the back button to go to B, I [sometimes] get an exception thrown which I can't trace. Output is below. I don't know where to go from here. I've only seen one other post mentioning this exception, but it was related to a reproducable error when rotating the device. This only happens sometimes.
CODE:....................
I know you can use the ddms view in eclipse to take a snapshot of the screen, but can you somehow make a video like that?
View 4 Replies View RelatedI just wanted a small piece of information. I am trying to record a video in background as a service. But, I am unable to record it. Can you tell me first of all that is it possible or not.
View 2 Replies View RelatedIs it possible to record video in a service, that is without setting the setPreviewDisplay? I tried it on a HTC Desire, however it is throwing this info in the log.
MediaRecorder Prepare Failed: -1
CameraInput No surface is available for display
Is there some additional properties to be set?
I am trying to record a video into sdCard. But everytime I click on the Button to record, it shows "stopped unexpectedly" error.
View 1 Replies View RelatedWhat's the best way to record a video showing things running on the Android Emulator? I want to record little demo videos of stuff running so I can put it on YouTube. I'm running the emulator on either Windows or a Mac.
View 6 Replies View Relatedany easy way to record the activities and views on my Android app to a video without root access. To be a bit more specific, I am looking for a screen-recording solution so that I can get a video of the user's interaction with the app interface. Connecting the phone to any device such as a computer to do the recording is not an option.
Here is a sample gif that I created using a Mac screen recorder to record the iOS simulator interface. It gives a rough idea of what I would like to achieve on Android, except for the fact that I would like the same to be from the actual phone (not the emulator) and without having to connect the phone to a computer or any other device.
we got a requirement to record video from front and rear cameras simultaniously.. In the Android 2.1 SDK we only have the MediaRecorder.VideoSource.CAMERA and DEFAULT, but not FRONT_CAMERA and REAR_CAMERA. So, is there any other way to record from Front camera.. like any third party API's.
View 1 Replies View RelatedI know the droid x does, but how about the droid 2?
View 25 Replies View RelatedI'm researching the development of an Android (2.2) app/service that will enable users to record short (I do emphasize short, < 30seconds) video on their phones and then upload that video (HTTP) to a server that will then transcode the video to other formats. That same user can download videos from other Android users and play them.
Now, I get a bit lost with everyones recommended approaches to all the issues in doing something like this because I haven't seen any ask this in a cohesive context. Ideally I would like a non commercial solution to this (as in no vendor/service being needed for the the video hosting/transcoding), but, feel free to include those as a recommendation (I've marked this as a wiki) as I know many like to use youtube and vimeo for the middle layer in all this.
The questions are
What server technologies do yo recommend for hosting and transcoding? What technology do you recommend for streaming the video (it would be nice to offer a high and low quality encoding depending on the users network connection) What video format and software do you recommend for converting the uploaded video on the server to be viewable later by other Android owners. Im assuming it's bad to do any transcoding on the phone prior to upload (battery/proc issues), but, if I'm wrong with that assumption what do you recommend?
The video will only need to render on an Android device, and in the future in a webkit html5 browser.
Bandwidth isnt cheap (even with numerous 30 second videos), so a good mix of video quality and video file size is important (streaming if needed to ensure quality vs. download). This is for android 2.2 devices with a video camera of course and medium to high density screen of 800x400 min. Open source solutions (server to receive the uploads, code to do the transcoding, server to do the streaming) are preferred, but not required. CDN's are an option, but I don't think that really figures in to the picture right now.
I need to record audio and video files in 3gp/mp4 format at the same file and same time.
When i run my application file is created with videofile.3gp but video does not record in sd card on the emulator.please let me clear one thing does video records on the emulator? if i run this code on android supported device do these error clear.
Please help me. I am new to this topic.please find the code and errors below.
package com.video;
* @copy Rights
* audio.java
* sample code for Eminosoft Developerworks Article
* Android development Team
* www.eminosoft.cm
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class video extends Activity {
public MediaRecorder mrec = null;
private Button startRecording = null;
private Button stopRecording = null;
private static final String TAG = "SoundRecordingDemo";
File audiofile;
File video;
private MediaPlayer mMediaPlayer;}
To do this, simply download "LED Desire Light" in the market, then enable the light after install. Now press the home button and bring up the camera. Set to video and voila! You've got a nice video flashlight for night capturing. Just be sure to go back to the LED Desire Light prog to disable it after use.
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