mpeg2enc/x264enc: fails to encode 720x405 resolution

Submitted by Jeff Fortin Tam `@nekohayo`

Link to original bug (#659965)

Description

+++ This bug was initially created as a clone of Bug 658303 +++

Steps to reproduce:
0. Insert the theora clip I'm linking here in the timeline

Click the render button to render a project
Click the "DVD" render preset
Try to render

Result: **ERROR: [python] vertical_size must be a even (4:2:0)