目前，我正在研究热、单声道等视频效果。为此，我正在使用带有画布内容的预览回调。
谁能告诉我如何保存这个视频？
下面我有我的回调代码：
mCamera.setPreviewCallback(new PreviewCallback() {
public void onPreviewFrame(byte[] data1, Camera _camera)
{
Camera.Parameters parameters = _camera.getParameters();
parameters.setColorEffect(Camera.Parameters.EFFECT_NONE);
previewSize = parameters.getPreviewSize();
int frameSize = previewSize.width * previewSize.height;
int height = previewSize.height;
int width = previewSize.width;
int pixel;
int A, R, G, B;
final double GS_RED = 0.299;
final double GS_GREEN = 0.587;
final double GS_BLUE = 0.114;
int[] rgba = new int[frameSize+1];
data = data1;
for (int i = 0; i < height; i++)
for(int j = 0; j < width; j++)
{
int y = (0xff & ((int) data[i * previewSize.width + j]));
int u = (0xff & ((int) data[frameSize + (i >> 1) * previewSize.width + (j & ~1) + 0]));
int v = (0xff & ((int) data[frameSize + (i >> 1) * previewSize.width + (j & ~1) + 1]));
y = y < 16 ? 16 : y;
int r = Math.round(1.164f * (y - 16) + 1.596f * (v - 128));
int g = Math.round(1.164f * (y - 16) - 0.813f * (v - 128) - 0.391f * (u - 128));
int b = Math.round(1.164f * (y - 16) + 2.018f * (u - 128));
r = r < 0 ? 0 : (r > 255 ? 255 : r);
g = g < 0 ? 0 : (g > 255 ? 255 : g);
b = b < 0 ? 0 : (b > 255 ? 255 : b);
rgba[i * previewSize.width + j] = 0xff000000 + (b << 16) + (g<< 8) + r;
}
Bitmap bmp = Bitmap.createBitmap(width, height,
Bitmap.Config.RGB_565);
bmp.setPixels(rgba, 0 , width , 0, 0, width, height);
// scan through every single pixel
for(int x = 0; x < width; ++x) {
for(int y = 0; y < height; ++y) {
// get one pixel color
pixel = bmp.getPixel(x, y);
// retrieve color of all channels
A = Color.alpha(pixel);
R = Color.red(pixel);
G = Color.green(pixel);
B = Color.blue(pixel);
// take conversion up to one single value
R = G = B = (int)(GS_RED * R + GS_GREEN * G + GS_BLUE * B);
// set new pixel color to output bitmap
bmp.setPixel(x, y, Color.argb(A, R, G, B));
}
}
canvas = mHolder.lockCanvas();
if (canvas != null)
{
canvas.drawBitmap(bmp, (canvas.getWidth() - width) / 4, (canvas.getHeight() - height) / 4, null);
mHolder.unlockCanvasAndPost(canvas);
}
bmp.recycle();
}
});