mpeg2enc: fails to encode exotic video sizes

Submitted by Julien Isorce @cap

Link to original bug (#637297)

Description

Steps to reproduce:

edited

$ gst-launch-1.0 videotestsrc num_buffers=100 ! "video/x-raw, width=570, height=322" ! mpeg2enc ! mplex ! filesink location=res.mp

Then play it with totem, vlc or mplayer. The video is not correct. It seems to be a stride or colorspace conversion problem.

Other infos:

It's ok with 320240, 640480 ...