MediaRecorder启动失败：-16 [英] MediaRecorder start failed: -16
问题描述
所以我知道有很多解决方案在那里为MediaRecorder启动时的误差，但大多围绕着启动失败：-19，它已被链接到NO_INIT的查看所选答案评论这里。我还没有找到任何解决办法，或-16甚至一个解释。
So I realize there are many solutions out there for MediaRecorder start errors, however most of them revolve around "start failed: -19", which has been linked to "NO_INIT" See comments in selected answer here. I haven't found any solution, or even an explanation for -16.
如果有人知道在哪里可以找到这些错误codeS的名字，或有code的解决方案-16请把答案在这里！这里是code我使用。 （HTC霹雳，股吧）
If someone knows where i can find the names of these error codes, or has a solution for code -16 Please put the answer here!! Here is the code I'm using. (HTC Thunderbolt, Stock)
mr.setVideoSource(MediaRecorder.VideoSource.CAMERA); //mr is my mediaRecorder
mr.setAudioSource(MediaRecorder.AudioSource.MIC);
mr.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
mr.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
mr.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
mr.setOutputFile(ParcelFileDescriptor.fromSocket(soc).getFileDescriptor()); //soc is a java.net.ServerSocket pointing to a port on the device
mr.setVideoSize(480,800);
mr.setVideoFrameRate(5);
mr.prepare();
mr.start(); //Crashes with "start failed: -16"
logcat的
LOGCAT
07-11 10:14:34.879: V/MediaRecorderJNI(17939): JNIMediaRecorderListener::setCamera
07-11 10:14:34.879: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:47.549: V/MediaRecorderJNI(17939): setVideoSource(1)
07-11 10:14:47.549: V/MediaRecorderJNI(17939): getMediaRecorder E
07-11 10:14:47.559: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:47.559: V/MediaRecorderJNI(17939): setAudioSource(1)
07-11 10:14:47.559: V/MediaRecorderJNI(17939): getMediaRecorder E
07-11 10:14:47.559: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:47.559: V/MediaRecorderJNI(17939): setOutputFormat(0)
07-11 10:14:47.559: V/MediaRecorderJNI(17939): getMediaRecorder E
07-11 10:14:47.559: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:47.559: V/MediaRecorderJNI(17939): setVideoEncoder(0)
07-11 10:14:47.559: V/MediaRecorderJNI(17939): getMediaRecorder E
07-11 10:14:47.559: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:47.559: V/MediaRecorderJNI(17939): setAudioEncoder(0)
07-11 10:14:47.559: V/MediaRecorderJNI(17939): getMediaRecorder E
07-11 10:14:47.559: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:47.559: V/MediaRecorderJNI(17939): setVideoFrameRate(5)
07-11 10:14:47.559: V/MediaRecorderJNI(17939): getMediaRecorder E
07-11 10:14:47.559: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:47.559: V/MediaRecorderJNI(17939): setOutputFile
07-11 10:14:47.559: V/MediaRecorderJNI(17939): getMediaRecorder E
07-11 10:14:47.559: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:47.559: V/MediaRecorderJNI(17939): prepare
07-11 10:14:47.559: V/MediaRecorderJNI(17939): getMediaRecorder E
07-11 10:14:47.559: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:47.559: V/MediaRecorderJNI(17939): start
07-11 10:14:47.559: V/MediaRecorderJNI(17939): getMediaRecorder E
07-11 10:14:47.639: E/MediaRecorder(17939): start failed: -16
07-11 10:14:47.639: V/MediaRecorderJNI(17939): process_media_recorder_call
07-11 10:14:59.290: W/dalvikvm(17939): threadid=10: thread exiting with uncaught exception (group=0x4001d5a0)
更新12年7月11日下午2时21分：Discoverd的错误code -16实际上是-EBUSY。扩大LogCat中，包括了一切，彻底梳理的Android源$ C $ C之后，我发现它的相关的inablility调整（初始化）相机设置，我不知道我在做什么错了，但它的一个开始。如果你有机会获得AOSP你可以看到错误来自/frameworks/av/media/libstagefright/CameraSource.cpp CameraSource :: ConfigureCamera
UPDATE 07/11/12 2:21 PM: Discoverd the the error code -16 is actually -EBUSY. After expanding the LogCat to include everything, and combing thorough the Android source code, I found that its related to an inablility to adjust (initialize) the camera settings, I'm not sure what I'm doing wrong but its a start. If you have access to AOSP you can see that the error comes from /frameworks/av/media/libstagefright/CameraSource.cpp CameraSource::ConfigureCamera
推荐答案
我跑这个错误（-16开始），发现它是通过使用不支持分辨率造成的。
I ran in to this error (-16 on start) and found out it was caused by using an unsupported resolution.
首先，你必须从支持的尺寸得到最优尺寸
First you have to get the optimal size from the supported sizes
Parameters params = camera.getParameters();
List<Size> sizes = params.getSupportedPreviewSizes();
optimalSize = getOptimalPreviewSize(sizes, width, height);
params.setPreviewSize(optimalSize.width, optimalSize.height);
然后确保你同时设置preVIEW和视频相同的尺寸（如果他们在我的经验，preVIEW不同的，当录像开始将冻结）：
Then make sure you set both preview and video to the same size (if they were different in my experience preview would freeze when video record started):
mediaRecorder.setVideoSize(optimalSize.width, optimalSize.height);
（样品code为getOptimal previewSize是Android SDK中）
(sample code for getOptimalPreviewSize is from android sdk)
private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
final double ASPECT_TOLERANCE = 0.1;
double targetRatio = (double) w / h;
if (sizes == null) return null;
Size optimalSize = null;
double minDiff = Double.MAX_VALUE;
int targetHeight = h;
// Try to find an size match aspect ratio and size
for (Size size : sizes) {
double ratio = (double) size.width / size.height;
if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
if (Math.abs(size.height - targetHeight) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - targetHeight);
}
}
// Cannot find the one match the aspect ratio, ignore the requirement
if (optimalSize == null) {
minDiff = Double.MAX_VALUE;
for (Size size : sizes) {
if (Math.abs(size.height - targetHeight) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - targetHeight);
}
}
}
return optimalSize;
}
这篇关于MediaRecorder启动失败：-16的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
