最近在使用OpenPTrack来进行人的跟踪测试，可是运行程序的时候总是崩溃。
OpenPTrack是通过roslaunch命令来运行程序的。
网上搜索了一下，可以找到对应的launch文件,在其中的node节点中增加如下语句即可
launch-prefix="xterm -e gdb -ex run --args "
我们以
$ roslaunch tracking detection_and_tracking_kinect2.launch
这条命令为例，detection_and_tracking_kinect2.launch文件的原始内容如下：
<launch>
<arg name="camera_name" default="kinect2_head" />
<!-- Start the Kinect -->
<include file="$(find kinect2_bridge)/launch/kinect2_bridge_ir.launch"/>
<!-- Launch ground based people detection node -->
<node pkg="detection" type="ground_based_people_detector" name="ground_based_people_detector" output="screen" required="true">
<rosparam command="load" file="$(find detection)/conf/ground_based_people_detector_kinect2.yaml" />
<param name="classifier_file" value="$(find detection)/data/HogSvmPCL.yaml"/>
<!--param name="camera_info_topic" value="/$(arg camera_name)/depth_lowres/camera_info"/-->
<param name="camera_info_topic" value="/$(arg camera_name)/ir_rect/camera_info"/>
<param name="output_topic" value="/detector/detections"/>
<!--param name="pointcloud_topic" value="/$(arg camera_name)/depth_lowres/points"/-->
<param name="pointcloud_topic" value="/$(arg camera_name)/depth_ir/points"/>
<param name="rate" value="60.0"/>
</node>
</launch>
增加调试命令之后的样子如下：
<launch>
<arg name="camera_name" default="kinect2_head" />
<!-- Start the Kinect -->
<include file="$(find kinect2_bridge)/launch/kinect2_bridge_ir.launch"/>
<!-- Launch ground based people detection node -->
<node pkg="detection" type="ground_based_people_detector" name="ground_based_people_detector" output="screen" required="true" launch-prefix="xterm -e gdb -ex run --args ">
<rosparam command="load" file="$(find detection)/conf/ground_based_people_detector_kinect2.yaml" />
<param name="classifier_file" value="$(find detection)/data/HogSvmPCL.yaml"/>
<!--param name="camera_info_topic" value="/$(arg camera_name)/depth_lowres/camera_info"/-->
<param name="camera_info_topic" value="/$(arg camera_name)/ir_rect/camera_info"/>
<param name="output_topic" value="/detector/detections"/>
<!--param name="pointcloud_topic" value="/$(arg camera_name)/depth_lowres/points"/-->
<param name="pointcloud_topic" value="/$(arg camera_name)/depth_ir/points"/>
<param name="rate" value="60.0"/>
</node>
</launch>
(注意代码添加位置)这样在执行原来例子的时候，就会先打开一个新的Shell界面，被调试的程序就在这个Shell中被执行了。
如果被调式的是Python脚本，则需要修改调试器为pdb,如下：
launch-prefix="xterm -e python -m pdb "