Gstpython已安装，但找不到插件

Question

我正在尝试为Google Coral USB加速器运行一些Gstreamer示例—我没有使用Coral开发板。该驱动程序已安装并运行，我可以使用OpenCV和edgetpu库对相机中的图像进行分类。我想让web服务器演示运行。我把范围缩小到Gstreamer无法找到Coral提供的插件

插件来自这个repo（它还包含演示代码edgetpu_detect_server和edgetpu_detect:https://coral.googlesource.com/edgetpuvision/+/refs/heads/master/plugins/

Coral提供了三个插件：

linaro@linaro-alip:~$ ls /home/linaro/edgetpuvision/plugins/
glbox.py  glsvgoverlaysink.py  glsvgoverlaysrc.py

尝试运行时出现的错误，例如检测服务器：

(edgetpu_detect:28764): dbind-WARNING **: 11:38:56.589: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
v4l2src device=/dev/video0 ! video/x-raw,format=YUYV,width=640,height=512,framerate=30/1 ! glupload ! tee name=t
t. ! queue ! glsvgoverlaysink name=glsink
t. ! queue max-size-buffers=1 leaky=downstream ! glfilterbin filter=glbox ! video/x-raw,format=RGB,width=300,height=300 ! appsink name=appsink emit-signals=True max-buffers=1 drop=True sync=False
Traceback (most recent call last):
  File "/usr/local/bin/edgetpu_detect", line 11, in <module>
    load_entry_point('edgetpuvision==1.0', 'console_scripts', 'edgetpu_detect')()
  File "/home/linaro/.local/lib/python3.7/site-packages/edgetpuvision/detect.py", line 207, in main
    run_app(add_render_gen_args, render_gen)
  File "/home/linaro/.local/lib/python3.7/site-packages/edgetpuvision/apps.py", line 70, in run_app
    display=args.displaymode):
  File "/home/linaro/.local/lib/python3.7/site-packages/edgetpuvision/gstreamer.py", line 248, in run_gen
    display=display)
  File "/home/linaro/.local/lib/python3.7/site-packages/edgetpuvision/gstreamer.py", line 254, in run
    run_pipeline(pipeline, layout, loop, render_overlay, display)
  File "/home/linaro/.local/lib/python3.7/site-packages/edgetpuvision/gstreamer.py", line 300, in run_pipeline
    pipeline = Gst.parse_launch(pipeline)
gi.repository.GLib.Error: gst_parse_error: no element "glsvgoverlaysink" (1)

我已经从如下所述的源代码安装了gst python:lifestyletransfer.com/how-to-install-gstreamer-from-sources-on-ubuntu/

看起来还可以，我已经将它与Python3.7进行了链接

linaro@linaro-alip:$ gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstpython.cpython-37m-aarch64-linux-gnu.so
Plugin Details:
  Name                     python
  Description              loader for plugins written in python
  Filename                 /usr/local/lib/gstreamer-1.0/libgstpython.cpython-37m-aarch64-linux-gnu.so
  Version                  1.14.2
  License                  LGPL
  Source module            gst-python
  Binary package           GStreamer GObject Introspection overrides for Python
  Origin URL               http://gstreamer.freedesktop.org


  0 features:

然而，当我尝试加载插件时，gst inspect找不到它们，例如

gst-inspect-1.0 --gst-plugin-path=$PWD | grep glbox

我还需要做其他配置工作吗

编辑：有趣的是，在开发板上（可以正常工作），gstreamer libs似乎没有安装（没有^{），但是演示程序显然通过Python在某处使用了gstreamer

Answer 1

gst-python中有一个bug（我向上游发送了一个补丁），它无法在正确的默认位置查找python插件。但是，它确实正确地查找了各种GST\u PLUGIN\u PATH环境变量指向的“python”子目录

Answer 2

该插件是专门为开发板设计的，实际上是针对开发板的硬件进行优化的。我不太确定是否有一个更好的简单方法，让它除了实际挖掘更多的工作。 这个演示有用吗？ https://github.com/google-coral/examples-camera/tree/master/gstreamer

Answer 3

我将检查python插件是否位于$GST_PLUGIN_PATH/python目录中