How to push rtmp using deepar result

I want to stream deepar videos using rtmp.

And followed agora's example here.

But I don't want to use agora's server.

I have an SRS server on my local server.

I tried this to get deepar's result from opengl. It worked.

GLES20.glReadPixels(x, 0, w, y + h, GLES20.GL_RGBA,
            GLES20.GL_UNSIGNED_BYTE, buffer);

use rtmp client to push data from opengl.

public native int writeVideo(byte[] data, int offset, int length, int timestamp);

I got return -1, it means send video fail.

examples, other rtmp client lib, any hint, will appreciate.

Solution