Ipx-550.mkv.mp4 -

Click Start Encode to create a clean, single-extension version.

A file named appears to have two video container extensions. IPX-550.mkv.mp4

Drag and drop your "IPX-550.mkv.mp4" into Handbrake. Preset: Choose "Fast 1080p30" for general use. Format: Select MP4 in the "Summary" tab. Click Start Encode to create a clean, single-extension