cras_bag_tools: filter_bag: ExportCmdVelToCSV: Fixed stamp.

Author: peci1

cras_bag_tools/src/cras_bag_tools/message_filters.py

@@ -2628,7 +2628,7 @@ def _get_fields(self):
     def _msg_to_csv_row(self, topic, msg, stamp, header, tags):
         msg_stamp = msg.header.stamp if msg._type == TwistStamped._type else stamp
         twist = msg if msg._type == Twist._type else msg.twist
-        return msg_stamp, twist.linear.x, twist.angular.z
+        return msg_stamp.to_sec(), twist.linear.x, twist.angular.z
 
 
 class ExportCameraInfoToYAML(MessageToYAMLExporterBase):