OpenCV support for RTSP

Rocky Linux Help & Support
1

Im trying to run a Python program on Rocky 10 which uses OpenCV to connect to an IP camera using RTSP.

I installed the python3-opencv package and its dependencies from EPEL (see below) but I am getting errors when connecting to the camera:

ERROR:0@5.536] global cap_ffmpeg_impl.hpp:1309 open Could not open codec libopenh264, error: -1313558101
[ERROR:0@5.536] global cap_ffmpeg_impl.hpp:1317 open VIDEOIO/FFMPEG: Failed to initialize VideoCapture
[ WARN:0@5.619] global cap_gstreamer.cpp:2823 handleMessage OpenCV | GStreamer warning: your GStreamer installation is missing a required plugin: Real Time Streaming Protocol (RTSP) source
[ WARN:0@5.619] global cap_gstreamer.cpp:2839 handleMessage OpenCV | GStreamer warning: Embedded video playback halted; module uridecodebin0 reported: No URI handler implemented for "rtsp".
[ WARN:0@5.619] global cap_gstreamer.cpp:1698 open OpenCV | GStreamer warning: unable to start pipeline
[ WARN:0@5.620] global cap_gstreamer.cpp:1173 isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created


rpm -qi python3-opencv
Name        : python3-opencv
Version     : 4.10.0
Release     : 8.el10_0
Architecture: aarch64
Install Date: Tue 04 Nov 2025 06:06:33 PM UTC
Group       : Unspecified
Size        : 9702815
License     : BSD-3-Clause AND Apache-2.0 AND ISC
Signature   : RSA/SHA256, Sat 22 Mar 2025 10:43:27 AM UTC, Key ID 33d98517e37ed158
Source RPM  : opencv-4.10.0-8.el10_0.src.rpm
Build Date  : Fri 21 Mar 2025 09:16:50 PM UTC
Build Host  : buildhw-a64-05.iad2.fedoraproject.org
Packager    : Fedora Project
Vendor      : Fedora Project
URL         : https://opencv.org
Bug URL     : 
Summary     : Python3 bindings for apps which use OpenCV
Description :
This package contains Python3 bindings for the OpenCV library.

Is there a missing package I can install to fix this? Ive previously run this program on Debian without issue so I know the program is not at fault.

Thanks

2

Not sure if it is needed but have you tried to install gstreamer1-rtsp-server.x86_64

3

Note that there are also plugins ‘rtsp’ and ‘rtspsrc’.

4

gstreamer1-rtsp-server did not work

5

do you know what the package names are for these struggling to find them?

6

Very easy to find out, since we know gstreamer is the key part, then you can check what gstreamer packages are available to install. You’ll then see from that a load of ones mentioning gstreamer1-plugins. Since RTSP no doubt is a plugin, would be why the server package didn’t help, since that would be if you want to run your own RTSP server. If you are looking to connect to a RTSP server, or playback RTSP, then that would be the plugin.

Based on my example below, we can check what is included in a package by listing it’s contents, and then grepping/filtering for certain phrases, like rtsp:

[root@rkelb ~]# dnf repoquery -l gstreamer1-plugins-good | grep -i rtsp
/usr/lib64/gstreamer-1.0/libgstrtsp.so

it would therefore potentially suggest that package is a place to start, eg: dnf install gstreamer1-plugins-good. Failing that, you can then repeat the repoquery command against all remaining gstreamer packages:

[root@rkelb ~]# dnf list *gstreamer*
Available Packages
PackageKit-gstreamer-plugin.x86_64                                1.2.8-8.el10                                 appstream
gstreamer1.x86_64                                                 1.24.11-1.el10                               appstream
gstreamer1-devel.x86_64                                           1.24.11-1.el10                               appstream
gstreamer1-plugins-bad-free.x86_64                                1.24.11-2.el10_0                             appstream
gstreamer1-plugins-bad-free-devel.x86_64                          1.24.11-2.el10_0                             crb      
gstreamer1-plugins-bad-free-libs.x86_64                           1.24.11-2.el10_0                             appstream
gstreamer1-plugins-base.x86_64                                    1.24.11-1.el10                               appstream
gstreamer1-plugins-base-devel.x86_64                              1.24.11-1.el10                               appstream
gstreamer1-plugins-base-tools.x86_64                              1.24.11-1.el10                               appstream
gstreamer1-plugins-good.x86_64                                    1.24.11-1.el10                               appstream
gstreamer1-plugins-good-gtk.x86_64                                1.24.11-1.el10                               appstream
gstreamer1-plugins-ugly-free.x86_64                               1.24.11-1.el10                               appstream
gstreamer1-rtsp-server.x86_64                                     1.24.11-1.el10                               appstream
gstreamer1-svt-av1.x86_64                                         2.3.0-1.el10_0                               epel     
libcamera-gstreamer.x86_64                                        0.3.2-3.el10_0                               appstream
libnice-gstreamer1.x86_64                                         0.1.22-7.el10_0                              epel     
pipewire-gstreamer.x86_64                                         1.2.7-1.el10                                 appstream
vlc-plugin-gstreamer.x86_64                                       1:3.0.21-16.el10_0                           epel

of which there are quite a few.

7

You can also check to see if it’s already there

gst-inspect-1.0 rtsp