add check to see if chapters are in file

[binarygeek119]

hi first of all love your script its working great for me. but i was hoping you could add one of these checks.

1. check to see if file has chapters and if so skips the file.
2. the ability to store what files have been runned thought the script and if it has then skips the file.
   this could be done with a simple text file listing all files ran though .

why am i requesting this. im running this script in bulk on all my tv shows and movies. im using a app called ErsatzTV (https://github.com/jasongdove/ErsatzTV) which emulates live tv. and i run Commercials at chapters to make it like a real broadcast. the app uses chapters to insert this Commercials in the stream. which is why im using your script. this issue is in running in bulk i sometimes get held up on a file (which may be a bad file) then i have to restart it and it starts back at the beginning. i got all the way to the b's and now im back a 2 broke girls.

the way i been running it in bulk is "find /media/TV_Shows -name "*.mkv" -print0 | xargs -0 -Imkv ./FFchap mkv" any help on this be great. thanks.