I’m trying to send raw audio in the L16 format over RTSP. I’m using the following pipelines for the server and client respectively. I eventually plan to add video to these pipelines as well.

Server:
./test-launch.out "filesrc location=L16.raw ! audioconvert ! audio/x-raw,format=S16BE,channels=2,rate=44100 ! rtpL16pay pt=96 name=pay0"

Client:
gst-launch-1.0 rtspsrc location=rtsp://localhost:8554/test latency=150 ! queue ! rtpL16depay ! autoaudiosink

I run into the following error when I try to use these pipelines.

ERROR: from element /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0: Unhandled error
Additional debug info:
../gst/rtsp/gstrtspsrc.c(6795): gst_rtspsrc_send (): /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0:
Service Unavailable (503)
ERROR: pipeline doesn’t want to preroll.
Setting pipeline to NULL …
Freeing pipeline …

Here’s the really strange bit: if I change the server to use audiotestsrc instead of filesrc, as shown below, everything works fine.

Server:
./test-launch.out "audiotestsrc ! audioconvert ! audio/x-raw,format=S16BE,channels=2,rate=44100 ! rtpL16pay pt=96 name=pay0"

Client remains unchanged.

I initially thought this could be due to the file that I am reading from being corrupted in some way, but I have verified that is not the case. Why does reading from a file break everything?

I’d really appreciate any help. I’m new to GStreamer and have no idea how to even begin troubleshooting this. Any help would be much appreciated!