I am extending jetson multimedia “10_Camera_recording” example with a NvBufferTransform for the video resolution conversion once the buffer is received from the Camera Source.
I have created the Transform Out FD using the ret = NvBufferCreateEx(&out_dmabuf_fd, &output_params);
output_params.width = 640; output_params.height = 480; output_params.layout = NvBufferLayout_Pitch; output_params.payloadType = NvBufferPayload_SurfArray; output_params.nvbuf_tag = NvBufferTag_VIDEO_CONVERT; output_params.colorFormat = NvBufferColorFormat_NV12;
Once the Transform is done, “NvBufferTransform(dmabuf_fd, out_dmabuf_fd, &transform_params)” , I would like to pass the updated buffer to “m_VideoEncoder->output_plane.qBuffer(v4l2_buf, dmabuf)”
but to pass I need the “dma buffer” of the “out_dmabuf_fd”. Can someone help me here to get the NvBuffer from the fd?
I need to enque the lower resolution buffer to the encoder.