怎么打开demo_3.5.record读取topic

怎么打开demo_3.5.record读取topic，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。

• 问：如何完成rostopic echo -b .bag -p /topic_name > .txt

• 答：使用cyber_channel echo /channel_name

例子

播放record文件

\[caros@in-dev-docker:/apollo\]$ cyber\_recorder play -lf data/record/demo\_3.5.recordfile: data/record/demo\_3.5.record, chunk\_number: 3, begin\_time: 1546888377338834894 (2019-01-08-03:12:57), end\_time: 1546888422886740928 (2019-01-08-03:13:42), message_number: 61615earliest\_begin\_time: 1546888377338834894, latest\_end\_time: 1546888422886740928, total\_msg\_num: 61615Please wait 3 second(s) for loading...Hit Ctrl+C to stop, Space to pause, or 's' to step.\[RUNNING\] Record Time: 1546888377.433    Progress: 0.094 / 45....

显示channel列表

[caros@in-dev-docker:/apollo]$ cyber_channel listThe number of channels is:  32/apollo/canbus/chassis/apollo/canbus/chassis_detail/apollo/control/apollo/control/pad/apollo/drive_event/apollo/guardian/apollo/hmi/audio_capture/apollo/hmi/status/apollo/localization/msf_gnss/apollo/localization/msf_lidar/apollo/localization/msf_status/apollo/localization/pose/apollo/monitor/apollo/monitor/system_status/apollo/navigation/apollo/perception/obstacles/apollo/perception/traffic_light/apollo/planning/apollo/prediction/apollo/routing_request/apollo/routing_response/apollo/sensor/gnss/best_pose/apollo/sensor/gnss/corrected_imu/apollo/sensor/gnss/gnss_status/apollo/sensor/gnss/imu/apollo/sensor/gnss/ins_stat/apollo/sensor/gnss/odometry/apollo/sensor/gnss/raw_data/apollo/sensor/gnss/rtk_eph/apollo/sensor/gnss/rtk_obs/tf/tf_static

显示channel内容

[caros@in-dev-docker:/apollo]$ cyber_channel echo /apollo/sensor/gnss/best_poseheader {  timestamp_sec: 1545095763.0131655  module_name: "gnss"  sequence_num: 3073}measurement_time: 1229130981sol_status: SOL_COMPUTEDsol_type: NARROW_INTlatitude: 37.415249592584814longitude: -122.00875424407722height_msl: 1.23227334395051undulation: -32.1datum_id: WGS84latitude_std_dev: 0.0124039669longitude_std_dev: 0.0176792257height_std_dev: 0.041889634base_station_id: "0"differential_age: 1solution_age: 0num_sats_tracked: 11num_sats_in_solution: 9num_sats_l1: 9num_sats_multi: 8extended_solution_status: 33galileo_beidou_used_mask: 0gps_glonass_used_mask: 51header {  timestamp_sec: 1545095764.0130444  module_name: "gnss"  sequence_num: 3074}measurement_time: 1229130982sol_status: SOL_COMPUTEDsol_type: NARROW_INTlatitude: 37.415306110750976longitude: -122.0087373614388height_msl: 1.2385389469563961undulation: -32.1datum_id: WGS84latitude_std_dev: 0.0123673109longitude_std_dev: 0.0177532453height_std_dev: 0.0420455635base_station_id: "0"differential_age: 1solution_age: 0num_sats_tracked: 10num_sats_in_solution: 8num_sats_l1: 8num_sats_multi: 8extended_solution_status: 33galileo_beidou_used_mask: 0gps_glonass_used_mask: 51header {  timestamp_sec: 1545095765.0112305  module_name: "gnss"  sequence_num: 3075}measurement_time: 1229130983sol_status: SOL_COMPUTEDsol_type: NARROW_INTlatitude: 37.415352879935718longitude: -122.00872341178777height_msl: 1.2605287469923496undulation: -32.1datum_id: WGS84latitude_std_dev: 0.0151290251longitude_std_dev: 0.020376863height_std_dev: 0.047324948base_station_id: "0"differential_age: 2solution_age: 0num_sats_tracked: 14num_sats_in_solution: 10num_sats_l1: 10num_sats_multi: 9extended_solution_status: 33galileo_beidou_used_mask: 0gps_glonass_used_mask: 51header {  timestamp_sec: 1545095766.0121005  module_name: "gnss"  sequence_num: 3076}measurement_time: 1229130984sol_status: SOL_COMPUTEDsol_type: NARROW_INTlatitude: 37.415389343576692longitude: -122.00871243535052height_msl: 1.2862052069976926undulation: -32.1datum_id: WGS84latitude_std_dev: 0.0137432581longitude_std_dev: 0.0162601564height_std_dev: 0.0376244374base_station_id: "0"differential_age: 2solution_age: 0num_sats_tracked: 15num_sats_in_solution: 13num_sats_l1: 13num_sats_multi: 11extended_solution_status: 33galileo_beidou_used_mask: 0gps_glonass_used_mask: 51header {  timestamp_sec: 1545095767.0116713  module_name: "gnss"  sequence_num: 3077}measurement_time: 1229130985sol_status: SOL_COMPUTEDsol_type: NARROW_INTlatitude: 37.415416242281566longitude: -122.00870413589038height_msl: 1.3115372871980071undulation: -32.1datum_id: WGS84latitude_std_dev: 0.0126857655longitude_std_dev: 0.0141515983height_std_dev: 0.0331060551base_station_id: "0"differential_age: 2solution_age: 0num_sats_tracked: 16num_sats_in_solution: 15num_sats_l1: 15num_sats_multi: 12extended_solution_status: 33galileo_beidou_used_mask: 0gps_glonass_used_mask: 51header {  timestamp_sec: 1545095768.0136344  module_name: "gnss"  sequence_num: 3078}measurement_time: 1229130986sol_status: SOL_COMPUTEDsol_type: NARROW_INTlatitude: 37.415433198552719longitude: -122.0086991019575height_msl: 1.3455344066023827undulation: -32.1datum_id: WGS84latitude_std_dev: 0.00993473455longitude_std_dev: 0.0119242864height_std_dev: 0.0302341301base_station_id: "0"differential_age: 1solution_age: 0num_sats_tracked: 16num_sats_in_solution: 16num_sats_l1: 16num_sats_multi: 13extended_solution_status: 33galileo_beidou_used_mask: 0gps_glonass_used_mask: 51

看完上述内容，你们掌握怎么打开demo_3.5.record读取topic的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注行业资讯频道，感谢各位的阅读！