Merge multiple rosbag2s

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I have currently a bunch of rosbag2s that have been recorded at 30second intervals. I now want to merge those into one large rosbag2.

I have tried looking at the following resources, but nothing is working the way I imagine:

1) https://stackoverflow.com/questions/8...

2) https://github.com/gopherchucks/Datab...

I know that rosbag2 is based on SQLlite, so it seems like this should be simple, but I am having trouble with this simple task. Does someone have any guidance on how to do this?