解决报错：Could not get EGL display connection GStreamer-WARNING **: 14:43:51.245: Failed to load plugin

今天，部署deepstream_lpr_app项目时，出现了以下的错误，奇怪的是，在第一部署的时候并没有出现以下错误，由于重新装了下系统，再次部署时，却发现了以下的错误。

因此，特写此文，一方面，希望自己以后再次遇到此问题时，能够更加快速地解决；另一方面，希望能够帮助到其他的人。

当我进行模型推理的时候，报出One element could not be created. Exiting.的错误。

于是我输入以下命令，

gst-inspect-1.0

唉，又报错了。

完整报错

nvbuf_utils: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection

(gst-plugin-scanner:31996): GStreamer-WARNING **: 14:43:26.410: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_udp.so': librivermax.so.0: cannot open shared object file: No such file or directory
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection

(gst-plugin-scanner:31998): GStreamer-WARNING **: 14:43:30.700: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_inferserver.so': libtritonserver.so: cannot open shared object file: No such file or directory

(gst-plugin-scanner:32003): GStreamer-WARNING **: 14:43:31.229: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_inferserver.so': libtritonserver.so: cannot open shared object file: No such file or directory
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection

(gst-plugin-scanner:32010): GStreamer-WARNING **: 14:43:36.028: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libcustom2d_preprocess.so': /usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libcustom2d_preprocess.so: undefined symbol: NvBufSurfTransformAsync
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection

(gst-plugin-scanner:32017): GStreamer-WARNING **: 14:43:48.951: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_preprocess.so': /usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_preprocess.so: undefined symbol: NvBufSurfTransformAsync
nvbuf_utils: Could not get EGL display connection

(gst-plugin-scanner:32017): GStreamer-WARNING **: 14:43:51.245: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstlibav.so': /usr/lib/aarch64-linux-gnu/libgomp.so.1: cannot allocate memory in static TLS block

突然发现，相比第一次部署，竟然报出了这么多的错误，憨憨的我赶紧查了下自己系统的版本。

版本情况如下

CUDA版本：10.2

tensorrt版本：8.0.1.6

JetPack版本：32.6.1

deepstream版本：6.0

官网的系统版本适配图如下：

通过对比发现：我的版本是没有问题的。于是开始细细地检查报错。

第一种类别报错

报错如下

nvbuf_utils: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display

解决方法

unset DISPLAY
rm ${
    
    HOME}/.cache/gstreamer-1.0/registry.*

输入上面的命令的目的是：将DISPLAY的值设为:0。

可以输入以下的命令查看：

echo $DISPLAY
# 输出为 :0

如果上述的命令并没有将DISPLAY的值设为0，请使用下面这种方法：

export DISPLAY=:0

然后再次输入命令查看：

echo $DISPLAY
# 输出为 :0

其实第一类报错算是已经解决了。

再次输入：

gst-inspect-1.0

发现报错减少了，但是还有4个：

(gst-plugin-scanner:32277): GStreamer-WARNING **: 15:05:17.622: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_udp.so': librivermax.so.0: cannot open shared object file: No such file or directory

(gst-plugin-scanner:32277): GStreamer-WARNING **: 15:05:17.628: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_inferserver.so': libtritonserver.so: cannot open shared object file: No such file or directory

(gst-plugin-scanner:32277): GStreamer-WARNING **: 15:05:17.634: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libcustom2d_preprocess.so': /usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libcustom2d_preprocess.so: undefined symbol: NvBufSurfTransformAsync

(gst-plugin-scanner:32277): GStreamer-WARNING **: 15:05:17.650: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_preprocess.so': /usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_preprocess.so: undefined symbol: NvBufSurfTransformAsync

说明第一类的报错已经解决了。

第二类报错

(gst-plugin-scanner:32277): GStreamer-WARNING **: 15:05:17.622: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_udp.so': librivermax.so.0: cannot open shared object file: No such file or directory

(gst-plugin-scanner:32277): GStreamer-WARNING **: 15:05:17.628: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_inferserver.so': libtritonserver.so: cannot open shared object file: No such file or directory

(gst-plugin-scanner:32277): GStreamer-WARNING **: 15:05:17.634: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libcustom2d_preprocess.so': /usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libcustom2d_preprocess.so: undefined symbol: NvBufSurfTransformAsync

(gst-plugin-scanner:32277): GStreamer-WARNING **: 15:05:17.650: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_preprocess.so': /usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_preprocess.so: undefined symbol: NvBufSurfTransformAsync

参考

https://blog.csdn.net/zong596568821xp/article/details/121231336

通过这篇文章发现，这些问题是Deepstream6.0所为解决的问题，可以忽略。

重新推理，得到正确的结果了。

至此，小记结束。