AVI Video Resolution and TV Display

[sambat]

Converting a 720x480 16:9 movie to AVI;resized to 640x360 and found that it doesn't fit the top and bottom edge of my WS TV.
I assumed that since it had the same AR as the DVD movie, it would display the same on the TV.
If it's resized to 640x352 it fits good.
Apart from being divisible by 16, what decides whether it's going to fill the screen?
Is it the DVD player or an intrinsic function of the TV set?
The posted image, is marked to indicate the black bars top and bottom of the 640x360 video.

[jagabo]

Are you using aspect ratio flags (divx? xvid?) in the video? If so, switch to square pixel.

Maybe the black bars are part of the picture? Note that many movies on DVD are wider than 16:9 and included black bars to fill out the frame.

[sambat]

Thank you for responding - but the problem is now gone - I'm assuming it was the DVD player.

I was using VirtualDub and the DivX codec set on Home Theatre with the default values.
The only change I made was on the VirtualDub Resize filter where I changed the setting to 'codec friendly 16'.

The reason I did that was because I had switched to AGK because of the problem and noticed that it was setting the size as 640x352 which worked.

[edDV]

720x400 wouldn't have scaled H, only V.