How RTP packets are handled in case of RTSP to RTSP proxy

[gizak]

Question

Hi I recently checked this awesome project. It is everything I need for my work (multiple protocols and stream routing, etc.). But currently I encountered a problem: I need to setup a RTSP server, with one end pushing the stream to it and read out from another end. The RTSP worked fine but it seems that all RTP packets were "reinterpreted" or translated and re-packed.

Here is how packets sent (H264 mode0, no STAP, no FU)

Here is how packets read from mediamtx server:

It seems that all sending packets were decoded and re-packed. But in my case I need H264 mode0 (packetization-mode=0, no aggregation, no STAP, no FU) to be compatible for some old receiver. How the RTP packets are handled from RTSP to RTSP? Is there a workaround to allow RTP passthru or similar?