@bcao Hello! I have been playing around with gst-dsexample but I am not sure how to construct a batch like nvstreammux since it is closed-source. Also, my output buffer size is expected to be larger than the input buffer so I have to use the transform callback. But I saw this Copy on content of input buffer to output buffer - #6 by DaneLLL. Is it still the case? And can you guide me on how to construct a batch?