Combining tf and tf_static from bagfile

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Hi,

I have recorded a bagfile with topics /tf and /tf_static. The evaluation tool I want to use can only handle messages from one topic, so I'd like to combine these two topics in one (which is /tf). Preferably with the messages from tf_static repeated at a certain rate.

Is there a clever way to do this? A hacky solution would be to write a listener for tf_static and publish the messages on /tf, but that seems a bit odd to me.