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Wireshark can easily capture hundreds of thousands of captures in under an hour. I'm wondering if it's possible to configure Wireshark to have WireShark save the capture after a certain amount of frames, and start a new capture after that, just to make sure it all remains within certain proportions.
Best way do do this I think is to start a new instance a few seconds before the save, which will make data overlap a bit, but this way you don't lose frames passed during the saving, and there's no alternative to my knowledge.