rtpvrawpay: preserve GST_BUFFER_FLAG_DISCONT on the first outputted buffer
If the incoming frame buffer has GST_BUFFER_FLAG_DISCONT set this should be preserved and set for the first output buffer too, like other payloaders do.
Spotted with gst-validate-1.0 when adding integration tests for rtpsession, a minimal test to reproduce the issue is:
$ gst-validate-1.0 videotestsrc num-buffers=1 ! rtpvrawpay ! identity ! fakesink Starting pipeline Pipeline started warning : Buffer didn't have expected DISCONT flag333 speed: 1.000000 /> Detected on <identity0:sink> Detected on <identity0:src> Detected on <fakesink0:sink> Description : Buffers after SEGMENT and FLUSH must have a DISCONT flag Issues found: 1 =======> Test PASSED (Return value: 0)
Not sure if these details are worth fixing as I am very new to gst-validate, so a comment would be appreciated.