Android 安卓:can';我无法从摄像机上获得30帧的速度
我正在使用ImageReader通过Camera2API从手机摄像头获取帧。 我已经在我的Android 安卓:can';我无法从摄像机上获得30帧的速度,android,frame-rate,android-camera2,Android,Frame Rate,Android Camera2,我正在使用ImageReader通过Camera2API从手机摄像头获取帧。 我已经在我的onConfigured回调函数中设置了RepeatingRequest,并且我记录了image.getTimestamp内onimageaviable函数来计算fps。 当我查看logcat上的时间戳时,我发现只有20 fps(每秒20个时间戳) 我的问题是: 我计算fps的方法好吗?有更好的办法吗 如果它是好的,那么为什么我得到20帧而不是30帧 以下是守则的相关部分: public void onIm
onConfigured
回调函数中设置了RepeatingRequest
,并且我记录了image.getTimestamp
内onimageaviable
函数来计算fps。
当我查看logcat上的时间戳时,我发现只有20 fps(每秒20个时间戳)
我的问题是:
public void onImageAvailable(ImageReader imageReader) {
Image image = imageReader.acquireLatestImage();
Log.d(TAG, "onImageAvailable: IMAGE AVAILABLE" + image.getTimestamp() );
// If STOP CAPTURE button hasn't been pressed yet
if ((!isStopped) && (image != null)) {
// Get the current frame
ByteBuffer pixelArray1 = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[pixelArray1.remaining()];
pixelArray1.get(bytes);
Mat mat = new Mat(image.getHeight() + image.getHeight() / 2, image.getWidth(), CvType.CV_8UC1);
mat.put(0, 0, bytes);
Mat rgb = new Mat(image.getHeight(), image.getWidth(), CvType.CV_8UC4);
// OpenCV function - convert from YUV which is the camera format into RGB which can be processed
Imgproc.cvtColor(mat, rgb, Imgproc.COLOR_YUV420sp2BGR, 4);
int pixelStride = image.getPlanes()[0].getPixelStride();
int rowStride = image.getPlanes()[0].getRowStride();
int rowPadding = rowStride - pixelStride * 640;
final Bitmap bitmap = Bitmap.createBitmap(640 + rowPadding / pixelStride, 480, Bitmap.Config.RGB_565);
Utils.matToBitmap(rgb, bitmap);
runOnUiThread(new Runnable() {
@Override
public void run() {
// Update screen with new frame
imageView.setImageBitmap(bitmap);
}
});
image.close();
}
else {
closeCamera();
}
}
};
OnConfigure:
public void onConfigured(CameraCaptureSession cameraCaptureSession) {
Log.d(TAG, "onConfigured: BUILD REQUEST AND CAPTURE");
try {
CaptureRequest.Builder requestBuilder = cameraCaptureSession.getDevice().createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
requestBuilder.addTarget(imageReaderSurface);
//cameraCaptureSession.setRepeatingRequest(requestBuilder.build(), null, handler);
cameraCaptureSession.setRepeatingRequest(requestBuilder.build(), null, handler);
Log.d(TAG, "onConfigured: AFTER CAPTURE");
} catch (CameraAccessException e) {
Log.d(TAG, "onConfigured: CANT CREATE CAPTURE REQUEST");
e.printStackTrace();
}
}
以及每秒显示20个时间戳的logcat:
03-24 11:41:30.919 16254-17780/com.example.noamm_000.talkwithcompviawifi
D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176055988501
03-24 11:41:30.964 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176106451209
03-24 11:41:31.014 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176156344543
03-24 11:41:31.067 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176205880116
03-24 11:41:31.120 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176256464074
03-24 11:41:31.168 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176306533293
03-24 11:41:31.217 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176357056886
03-24 11:41:31.269 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176406944855
03-24 11:41:31.313 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176457030845
03-24 11:41:31.363 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176506663397
03-24 11:41:31.414 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176556684438
03-24 11:41:31.467 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176607584803
03-24 11:41:31.520 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176658480428
03-24 11:41:31.567 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176706916105
03-24 11:41:31.613 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176757571834
03-24 11:41:31.664 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176807395636
03-24 11:41:31.717 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176857408865
03-24 11:41:31.767 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176907807199
03-24 11:41:31.816 16254-17780/com.example.noamm_000.talkwithcompviawifi D/CAMERA_IMAGE_READY:: onImageAvailable: IMAGE AVAILABLE39176957648657
*我试着在onimageaviable
中对所有正在完成的工作进行注释,只留下时间戳日志,但我仍然得到了20 fps
谢谢,,
诺姆你所看到的是正常的
setRepeatingRequest的文档明确指出,“使用此方法,相机设备将使用提供的CaptureRequest中的设置,以可能的最大速率持续拍摄图像。您将获得的帧速率取决于许多因素-拍摄请求设置、相机硬件、可用cpu电源、,拍摄的图像等。根据照明条件,某些设备的帧速率可能会有所不同(较暗的环境可能意味着较低的帧速率)。尝试在明亮的环境中测试。@samgak我只在明亮的环境中测试过它,而且,我错过了超过10帧(50%)-光线会对fps产生如此巨大的影响吗?@samgak我再次尝试,将相机直接对准一盏灯,获得了23帧。很好,那丢失的7呢?好吧,我想我想知道的是,是否有一种方法可以强制帧速率为30(甚至更高)?或者至少是常数,因为我需要它在以后的计算中是静态的。