How to record multiple realsense (e.g. D415) simultaneously from one computer using bag file?

[ZHe00]

I want to record both color and depth information from two realsense at the same time. I am using D415 and python. Here is the code I found online. Check here https://github.com/IntelRealSense/librealsense/blob/master/wrappers/python/examples/box_dimensioner_multicam/box_dimensioner_multicam_demo.py#121 and https://github.com/IntelRealSense/librealsense/blob/79dda7f00ebde9564f1a2053b8ab95b7ba41ac69/wrappers/python/examples/box_dimensioner_multicam/realsense_device_manager.py#198

I found using wait_for_frames will cause lags between two bag files. Then some suggested to use poll_for_frames, like the below. I copied from the examples. However, it reported errors for this function all the time. Anyone has clues for that?

streams = device.pipeline_profile.get_streams() frameset = rs.composite_frame(rs.frame()) device.pipeline.poll_for_frames(frameset)

[MartyG · Accepted solution]

A user who was trying to save the streams from two cameras to a bag identified that in their particular case, their problems were related to their PC's hard disk drive capabilities and not the SDK or their code.

https://github.com/IntelRealSense/librealsense/issues/2882#issuecomment-448596230