Provide rebroadcast filtering
I have some podcasts on my feed that I really love, so I've listened to every episode, but that have a nasty habit of rebroadcasting old episodes. It would be great if there were a way to check for redundant episodes and filter them out.
Some podcasts are kind enough to put the word "rebroadcast" in the title, so I can just filter out that keyword. But for others, it is not so simple.
Some number their episodes, so if I could filter by partial keyword; I could, for example, filter out episodes 1-599 by excluding regex #[1-5]?[0-9]{1,2}\b or 100-199 with the wildcard search #1*. Some simply have the same title; so the only way to identify them would be to compare their title or contents to older episodes in the feed.
It would be great to have more filtering options.