Remove Mediainfo Dependency

[joncameron]

Description

Work related to incorrect duration values being written into Avalon metadata for files (see #5754) has brought to attention Avalon's use of an older version of Mediainfo. Mediainfo is only being used for basic information gathering and could be removed as a dependency altogether in favor of the FFmpeg toolchain. This would free Avalon from using this older version of mediainfo, and reduce breaking changes related to mediainfo.

This is separate from the Active Encode gem which still uses mediainfo. Active Encode uses the current version of mediainfo with the updated XML schema and does not have this same problem.

Done Looks Like

• Mediainfo calls replaced with ffprobe

[joncameron]

A separate issue can be created in the Active Encode repo to remove mediainfo as a dependency there as well.