Video not correct aspect ratio

[ddbruce]

I'm using the standard ffmpeg transcoding for video, but all the widescreen videos I'm playing are squished into 4:3.

ffmpeg -ss %o -i %s -async 1 -b %bk -s %wx%h -ar 44100 -ac 2 -v 0 -f flv -vcodec libx264 -preset superfast -threads 0 -