Got you, I think that's all avenues explored. I will thank you for your help and awesome software, it's clear from the short time I have used FileBot that they are both of high quality.

OK, but I can't correct the empty Encoded_Library_Name property ?

:idea: AFAIK, files encoded with x264 typically do have the Encoded_Library_Name property set. That's what we use in the {vc} binding to yield x264 instead of generic AVC . Typically I have quite a few where this isn't the case and the only reference to the implimentation used is in the file name ...

Fair comment on the Regex, it was a parallel question I had after reading a few other posts here. That said, where is the .split() function documented ? and the list of other available functions ? All I have found so far are here https://www.filebot.net/naming.html and what pressing F1 in the app ...

Many thanks for the help with InternetMediaType. Can I ask what flavor of Regex does FileBot use ? (So I can read up) As for why not use {vc} or {vcf}. I have a few files where 265 or 264 is mentioned in the file name, but {vc}.{vcf} just produce HVEC.HVEC or AVC.AVC. InternetMediaType seemed to be ...

I would like to include the variable video.internetmediatype in my renamed files. The contents of this typically looks like "video/H264" or "video/H265". I want to remove the "video/" text to leave me with "H264" or H265" but I am failing. Unaltered the slash in video.internetmediatype causes ...