java - Android libwebp encoding -


would able provide example of using libwebp ndk library encode image webp ?

i'm trying encode image captured camera rgb_565 using code below: 

@override     public void onpreviewframe(byte[] data, camera camera) {         int w = camera.getparameters().getpreviewsize().width;         int h = camera.getparameters().getpreviewsize().height;         try {             int stride = (w + 1) & ~1;             byte[] out = libwebp.webpencodergb(data, w, h, stride, 80f);         } catch (exception e) {             e.printstacktrace();         }      }

i've tried several values stride, ranging w, w+1, w*2, w*3 , w*4 ... latter results in fatal exception.

the above code produces black , white image, duplicates picture several times sideways...

i can't tell if webp supports encoding rgb_565 stream, guess no.

as alternative, can convert rgb_888 such in answers given here: how 1 convert 16-bit rgb565 24-bit rgb888?

and correct way stride width*bytesperpixel, or in case of rgb_888 width * 3. when encoding rgba_8888 width * 4.


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