How to get the NvBuffer from the fd?

Hi,
Please refer to this patch:

You can queue the buffers like:

+                // Push the frame into V4L2.
+                enc_buf.m.planes[0].m.fd = fd;
+                enc_buf.m.planes[0].bytesused = 1; // byteused must be non-zero
+                ctx->enc->output_plane.qBuffer(enc_buf, NULL);