OpenCV/Pythin doesn't support Gstreamer

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

I can use the following gstreamer command and it works well

gst-launch-1.0 filesrc location=<filename_h264.mp4> ! qtdemux ! h264parse ! nvv4l2decoder ! nvoverlaysink -e

But my OpenCV/Python doesn’t support Gstreamer when print(cv2.getBuildInormation()).

I have built OpenCV with -D WITH_GSTREAMER=ON and the output of cmake also showed GStreamer YES.

I check OpenCV/Python on PC(Ubuntu) and it support GStreamer by print(cv2.getBuildInormation()).

It looks like python3 of Jetson doesn’t connect to the OpenCV I built (I make install OpenCV to /opt/opencv4) because GTK+ also doesn’t support.
Is there any steps I need to do for Jetson Orin for GStreamer support for OpenCV/Python?

Platform: Jetson AGX Orin
Jetpack: 5.1.1
OpenCV: 4.8 (re-built from source code)
Python: 3.8
Gstreamer: 1.16.3

4

Hi,
The OpenCV package installed through SDKManager has gstreamer enabled. You may try the package.

For manually building/installing OpenCV, please try

Jetson AGX Orin FAQ
Q: How to build an OpenCV with CUDA support on JetPack 6.0 GA?

5

Thanks DaneLLL,

I think it may the reason that I make install OpenCV to /opt/opencv4 not /usr/local.
Since we use custom board and need to config opencv manually so can’t install Jetpack 6.0 by SDKmandger. I am not sure if I make install opencv to /usr/local can solve this issue. just want to know it is possible to let Python3 to use th opencv I built in other path. Thanks

6

Hi DaneLLL, Are you sure - I just installed via SDKManager and when checking opencv I see:

Video I/O:
DC1394: NO
FFMPEG: YES
avcodec: YES (59.37.100)
avformat: YES (59.27.100)
avutil: YES (57.28.100)
swscale: YES (6.7.100)
avresample: NO
GStreamer: NO
v4l/v4l2: YES (linux/videodev2.h)

I literally read your answer yesterday and this morning rebuilt the Orin.
Do let me know if you need further information.
I can stream outside of opencv just fine, but as GStreamer: NO I’m a tad confused!

Regards
James

7

Update from me:
Reinstalled Orin, numpy is the only thing that was pulled in on the install.
Installing fresh Jetpack got me to the right version of cv2 with gstreamer available.

I found my issue though, installing ultralytics via pip overwrote cv2 and removes gstreamer enablement.

I could use no-deps though is this the right, way to add ultralytics in, I’m not sure what other JP components its hosing.

Quite new to Orin/JP6.

8

Hi,
Not sure if it works but you may try to install ultralytics first. And then install SDK Components.

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