Opencv error on video: gstreamer missing required plugin

$ python
Python 3.6.8 (default, Jan 31 2019, 09:06:51)
[GCC 8.2.1 20181215 (Red Hat 8.2.1-6)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> cap = cv2.VideoCapture('chaplin.mp4')
Failed to query video capabilities: Inappropriate ioctl for device
libv4l2: error getting capabilities: Inappropriate ioctl for device
VIDEOIO ERROR: V4L: device ../GOTURN/chaplin.mp4: Unable to query number of channels
OpenCV(3.4.1) Error: Unspecified error (GStreamer: your gstreamer installation is missing a required plugin
) in handlemessage, file /builddir/build/BUILD/opencv-3.4.1/modules/videoio/src/cap_gstreamer.cpp, line 1869
VIDEOIO(cvCreateCapture_GStreamer (CV_CAP_GSTREAMER_FILE, filename)): raised OpenCV exception:

OpenCV(3.4.1) /builddir/build/BUILD/opencv-3.4.1/modules/videoio/src/cap_gstreamer.cpp:1869: error: (-2) GStreamer: your gstreamer installation is missing a required plugin
in function handlemessage

>>>

I have tried multiple video files (mp4). All have the same problem. If you couldn't reproduce the problem, I can upload my video file (although I don't think it's necessary).

You can find gstreamer for rockchip linux here : https://github.com/rockchip-linux/gstreamer-rockchip

谢谢，方便提供一下rpm吗？

chuyee 发表于 2019-2-13 13:19
谢谢，方便提供一下rpm吗？

sorry，回错内容了，我们还没有gsteam的rpm包，我帮你咨询下

The problem is fixed. Thanks!

chuyee 发表于 2019-2-15 08:54
The problem is fixed. Thanks!

请问怎么解决的？我按照你说的提示找不到

jefferyzhang 发表于 2019-2-13 09:05
You can find gstreamer for rockchip linux here : https://github.com/rockchip-linux/gstreamer-rockchi ...

请问这个问题怎么解决？看样子是驱动问题？

linuxsky 发表于 2019-2-19 09:36
请问这个问题怎么解决？看样子是驱动问题？

只是没装gstreamer而已，但是源自带的gstreamer是用cpu做编解码的，速度极其低下。
rockchip-linux的github里有结合了硬件vpu编解码的gstreamer，下下来编译安装下就可以解决问题。

jefferyzhang 发表于 2019-2-19 09:50
只是没装gstreamer而已，但是源自带的gstreamer是用cpu做编解码的，速度极其低下。
rockchip-linux的gith ...

哦哦，我用 dnf  安装了 gstreamer-* 这样也不行么？ 好的那我下来编译试试。多谢

jefferyzhang 发表于 2019-2-19 09:50
只是没装gstreamer而已，但是源自带的gstreamer是用cpu做编解码的，速度极其低下。
rockchip-linux的gith ...

我刚才编译 make  install 了，发现问题还是有