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I use tsparse element to obtain the current PAT/PMT/SDT tables from my stream. However, the behavior of the element seems unintuitive to me: if the PAT of the same content was met before, the corresponding message does not appear. For example when I feed two streams interchangeably to the tsparse, it emits PAT for each stream only once, so I couldn't fetch the actual stream structure. Is there any way to get the actual stream PAT (and SDT)? Is there any way to check if the PAT has changed?