Preroll and Media Preparation Failures in RTSP Pipeline with Raw Streams

General Discussion
1

Hi,

I’m facing an issue with my RTSP media server pipeline. When I use encoding and decoding elements, the RTSP server runs smoothly. However, when I try running the pipeline without encoding/decoding, it fails.

udpsrc address=239.202.107.61  port=6310 do-timestamp=true
timeout=60000000000 buffer-size=0 caps="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)MP2T,payload=(int)33" ! rtpbin name=recv_rtp  ! watchdog timeout=300000 ! tee name=raw_stream raw_stream. ! rtpmp2tdepay2 ! tsparse set-timestamps=true ! video/mpegts,packetsize=192 ! queue ! multifilesink filename_time=true next-file=5 max-file-duration=600000000000
location=/tmp/record_repo/stream_%s.ts  tee name=out_video ! queue  ! fakesink sync=true async=false out_video. ! queue ! rtph264pay name=pay0 pt=96

Logs -


0:00:25.036789555 74247 0x7f5bc8000b70 WARN               rtspmedia rtsp-media.c:3879:wait_preroll: failed to preroll pipeline
0:00:25.036807191 74247 0x7f5bc8000b70 WARN               rtspmedia rtsp-media.c:4249:gst_rtsp_media_prepare: failed to preroll pipeline
0:00:25.039769604 74247 0x7f5bc8000b70 ERROR             rtspclient rtsp-client.c:1117:find_media: client 0x55b99168b360: can't prepare media
0:00:25.039911700 74247 0x7f5bc8000b70 ERROR             rtspclient rtsp-client.c:3412:handle_describe_request: client 0x55b99168b360: no media

If I replace rtph264pay with a raw payload type, it still doesn’t work.

Any suggestions or guidance would be appreciated!

2

Just fyi, in GStreamer the term “raw” is usually only used to refer to raw audio samples / video pixels as in the output of a decoder.

The pipeline above is not expected to work, you’re feeding MPEG-TS into the tee, so you would have to use an rtpmp2tpay or rtpmp2tpay2 here.

What GStreamer version is this with?

There was a fix for tsparse that made it handle 192-byte TS packets, which is only in the 1.25 releases so far.

3

Thanks for your reply. !
I have already applied the suggested fix for tsparse, and the payloader you recommended worked for me.
Thanks!