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Are there more frames in compressed BAG files?

asked 2019-10-08 18:42:36 -0500

Abraham gravatar image

I am following the same process to measure how many frames I supposedly have lost during recording with an Intel RealSense D435 camera as outlined here: https://answers.ros.org/question/3329...

I am finding that I have many files where 10000-15000 per 20000-30000 frames are being dropped... This is very significant, so I wanted to confirm whether there are "hidden" frames in compressed BAG files.

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answered 2019-10-08 21:45:08 -0500

ahendrix gravatar image

There are no "hidden" messages (frames or otherwise) in compressed bag files.

As suggested in the previous post, I would attempt to inspect the bag file in rqt_bag, to see what the timing of the missing frames is. Based on missing almost exactly half of your expected data, I suspect your sensor may be running at 15fps instead of the expected 30 fps.

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Asked: 2019-10-08 18:42:36 -0500

Seen: 17 times

Last updated: Oct 08