先前ssh到jetson转化yolo到engine一直是没有问题的，结果最近经常无法转化，报错如下：
deepstream-app -c deepstream_app_config_yoloV3.txt
nvbuf_utils: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
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
No EGL Display
nvbufsurftransform: Could not get EGL display connection
(gst-plugin-scanner:30693): GStreamer-WARNING **: 10:38:48.497: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_inferserver.so': libtensorflow_trtis.so.1: cannot open shared object file: No such file or directory
No EGL Display
nvbufsurftransform: Could not get EGL display connection
(gst-plugin-scanner:30694): GStreamer-WARNING **: 10:38:48.541: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_inferserver.so': libtensorflow_trtis.so.1: 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
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
nvbuf_utils: Could not get EGL display connection
** ERROR: <create_multi_source_bin:1029>: Failed to create element 'src_bin_muxer'
** ERROR: <create_multi_source_bin:1104>: create_multi_source_bin failed
** ERROR: <create_pipeline:1263>: create_pipeline failed
** ERROR: <main:632>: Failed to create pipeline
Quitting
App run failed
最终发现解决方法如下：
unset DISPLAY
rm ${HOME}/.cache/gstreamer-1.0/registry.*
如果${HOME}/.cache/gstreamer-1.0/没有文件，则不需要这个命令，实际只需要执行一下
unset DISPLAY，之后再次
deepstream-app -c deepstream_app_config_yoloV3.txt
即可正常转化