There is no update from you for a period, assuming this is not an issue any more. Hence we are closing this topic. If need further support, please open a new one. Thanks.
currently deepstream-app can suuport this kinds of sink 1=FakeSink 2=EglSink 3=File 4=UDPSink 5=nvdrmvideosink 6=MsgConvBroker directly. deepstream-app code is opensource, you can customize it. creating sink code is in \opt\nvidia\deepstream\deepstream-6.4\sources\apps\apps-common\src\deepstream_sink_bin.c. please refer to the command-line in this link.