Send Timestamp Information using Gstreamer along with video frames for real time streaming from a Jetson Xavier

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
1

Hi,

I am a beginner with Gstreamer, trying to send multiple camera feeds (6) from a Jetson Xavier for a realtime application. I was able to use the gst-launch cmd to transfer the frames seamlessly but couldn’t find a way to send time stamp for every frame that is streamed. Requirement: frame1, it’s time stamp1, frame2, timestamp2… or any other way to send the time stamp information across along with the video would be really helpful. Thanks.

I was able to embed the start time of the stream onto the video (‘timeoverlay’). eg: video has ‘00:00:00’ embedded in each frame and also, used ‘clockoverlay’ to embed the time in '23:13:05:89’ (hh:mm:ss:ms) format which I am NOT looking for. I would like to send the timestamp independently and not embedded in a video as such, so I can make use of it while receiving it

Any possible links to some source code would also be much appreciated.

Thanks

3

Hi,
You may try timeoverlay plugin. Please check
https://gstreamer.freedesktop.org/documentation/pango/timeoverlay.html?gi-language=c

4

Hi, Thanks for the reply, I edited my post to mention that I used ‘timeoverlay’ as well. Moreoever, time overlay provides only different types of stream-time and never the absolute global clock time. Also, timeoverlay still doesn’t let me use the time in the receiver side, it’s just an overlay as such. I want to extract the time per se, and use it for an external synchronization.
Thanks

5

Hi,
We don’t have much experience in this. Did some search and this may help:
http://gstreamer-devel.966125.n4.nabble.com/MPEG-TS-PCR-and-PTS-td4686939.html

If you have further questions, please make a post in gstreamer forum. Users in the forum may be able to share guidance.