uridecodebin3 fails due to missing RTP depayloader

Vladan Jovanovic vladan.jovanovic at gmail.com
Wed Jan 11 13:28:01 UTC 2023


I'm encountering an issue with uridecodebin3 that it is not able to
initiate streaming from RTSP source due to a missing
VND.ONVIF.METADATA RTP depayloader. Is this a known issue for

This happens on gstreamer 1.16.3 on Ubuntu x86 as well as gstreamer
1.20.0 on i.MX/ARM CPU.

root at imx8qmmek:~# gst-launch-1.0 uridecodebin3
uri=rtsp:// ! imxvideoconvert_g2d
! autovideosink

Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Progress: (open) Opening Stream
Progress: (connect) Connecting to rtsp://
Pipeline is PREROLLED ...
Prerolled, waiting for progress to finish...
Progress: (open) Retrieving server options
Progress: (open) Retrieving media info
Progress: (request) SETUP stream 0
Progress: (request) SETUP stream 1
Progress: (open) Opened Stream
Setting pipeline to PLAYING ...
New clock: GstSystemClock
Progress: (request) Sending PLAY request
Redistribute latency...
Redistribute latency...
Redistribute latency...
Progress: (request) Sending PLAY request
Redistribute latency...
Progress: (request) Sent PLAY request
Redistribute latency...
Redistribute latency...
Redistribute latency...

====== V4L2DEC: 1.20.0 build on Jul 28 2022 06:57:16. ======
Redistribute latency...
Redistribute latency...
Missing element: VND.ONVIF.METADATA RTP depayloader
ERROR: from element
parsebin1: Your GStreamer installation is missing a plug-in.
Additional debug info:
../git/gst/playback/gstparsebin.c(3470): gst_parse_bin_expose ():
no suitable plugins found:
Missing parser: application/x-rtp (application/x-rtp,
media=(string)application, payload=(int)98, clock-rate=(int)9
0000, encoding-name=(string)VND.ONVIF.METADATA, npt-start=(guint64)0,
npt-stop=(guint64)410634000000, play-speed=(d
ouble)1, play-scale=(double)1, onvif-mode=(boolean)false, ssrc=(uint)1944520475)

Execution ended after 0:00:02.594221971
Setting pipeline to NULL ...

I can start streaming just fine specifying the pipeline directly:
gst-launch-1.0 rtspsrc
location="rtsp://" ! rtph264depay
! h264parse ! v4l2h264dec ! imxvideoconvert_g2d ! autovideosink

best regards,

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