First of all I've to thank you for making such a fantastic tool!
I recorded a few 640x480 and 320x240 videos as general avi mpeg4 (divx) files.
When I open them in mplayer or totem, the ratio seemed to have changed from 4:3 to 16:9.
In VLC I get also 16:9, but it's shown as a 4:3 with a black band to its right side.
Only with avidemux I get the correct ratio.
Is this something done by xvidcap or a gstreamer misconfiguration on my box?