ros usb_cam <Error> select timeout的问题

问题同上, 当出现

[ERROR] [1577096025.464443267]: select timeout
[usb_cam-1] process has died [pid 8073, exit code 1, cmd /home/ape0/catkin_ws_rp/devel/lib/usb_cam/usb_cam_node __name:=usb_cam __log:=/home/ape0/.ros/log/ed6a76aa-256b-11ea-aec4-c400ad3e7ef2/usb_cam-1.log].
log file: /home/ape0/.ros/log/ed6a76aa-256b-11ea-aec4-c400ad3e7ef2/usb_cam-1*.log

问题可能原因

1. resolution is too high ，尝试将长于宽同比例改的稍微小一点.(与此同时如果有通过calibration 得到的camera info， 要重新calibrate,务必要保持这两个长宽一致）
2. frame rate is too high尝试将frame rate 降低一些

将长于宽更改时， 如果还试图使用apriltag_ros等，检查长宽更改是否会影响定位的数据，很有可能定位会出现偏差，要把相应camera_info都改掉