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Reading from the help dialogue, it states: "play back all messages without waiting"

https://github.com/strawlab/ros_comm/blob/6f7ea2feeb3c890699518cb6eb3d33faa15c5306/tools/rosbag/src/rosbag/rosbag_main.py#L169

In other words, rosbag will play back the entire bag file without waiting the recorded duration of time between messages, or simply ignoring realtime playback and instead playing back the messages over the ros network as fast as it can read them off the disk.

Again, from the source code, we can see this option sets the at_once boolean, bypassing the normal wait mechanics for regular linear time playback.

https://github.com/strawlab/ros_comm/blob/6f7ea2feeb3c890699518cb6eb3d33faa15c5306/tools/rosbag/src/player.cpp#L266

This option is useful if you arr performing any offline processing or filtering and would like to save time. Just be confident that your pipeline can keep place with disk read speeds, as to note any drop messages.

Reading from the help dialogue, it states: "play back all messages without waiting"

https://github.com/strawlab/ros_comm/blob/6f7ea2feeb3c890699518cb6eb3d33faa15c5306/tools/rosbag/src/rosbag/rosbag_main.py#L169

In other words, rosbag will play back the entire bag file without waiting the recorded duration of time between messages, or simply ignoring realtime playback and instead playing back the messages over the ros network as fast as it can read them off the disk.

Again, from the source code, we can see this option sets the at_once boolean, bypassing the normal wait mechanics for regular linear time playback.

https://github.com/strawlab/ros_comm/blob/6f7ea2feeb3c890699518cb6eb3d33faa15c5306/tools/rosbag/src/player.cpp#L266

This option is useful if you arr performing any offline processing or filtering and would like to save time. Just be confident that your pipeline can keep place with disk read speeds, as to note not any drop messages.

Reading from the help dialogue, it states: "play back all messages without waiting"

https://github.com/strawlab/ros_comm/blob/6f7ea2feeb3c890699518cb6eb3d33faa15c5306/tools/rosbag/src/rosbag/rosbag_main.py#L169

In other words, rosbag will play back the entire bag file without waiting the recorded duration of time between messages, or simply ignoring realtime playback and instead playing back the messages over the ros network as fast as it can read them off the disk.

Again, from the source code, we can see this option sets the at_once boolean, bypassing the normal wait mechanics for regular linear time playback.

https://github.com/strawlab/ros_comm/blob/6f7ea2feeb3c890699518cb6eb3d33faa15c5306/tools/rosbag/src/player.cpp#L266

This option is useful if you arr performing any offline processing or filtering and would like to save time. Just be confident that your pipeline can keep place with disk read speeds, as to not drop any drop messages.