I am using the search tool Everything on two PC's, a Windows 8 PC on which I am able to search within "comments" property of MP4 video files (e.g. if I set it myself manually), and another machine, a Windows 7 PC, on one which the same process (setting comments property, search with Everything fails).
Here are some experiments I've done:
- On Windows 7 PC - Searching within MP3 files with Everything, using "comment:<search_term>" - works (Everything uses singular "comment" function/term for this as per these instructions.)
- Searching within the same MP4 files with Windows Explorer
comments:<search_term>
- works. - Searching MP4 files with
content:<search_term>
- works in Everything, but is too slow for my purpose.
I am using the same major version of Everything (1.4). My understanding is that this somehow relies on a specific IFilter (?) being installed, but I can't quite tell how to troubleshoot it from here and what to try install (especially given that Windows Explorer is able to search within files).