Cropping overscan area???

[franco]

If I crop the overscan area when encoding to MPEG2 from footage I have captured from VHS will this cause any problems??

If the recommended resolution for PAL DVD-R is 576 x 352 and I crop a little bit off it shows up in prooder as something like 568 x 346 or something along those lines.

Will that make it a resolution that is not compatible with certain players???

[sacajaweeda]

I wouldn't crop the overscan area unless you were wanting a file to play on your PC and not your TV set. You probably won't even see the overscan on your set. If you are wanting to crop for PC viewing, resize it to a DVD legal frame size. Ie, if you are starting with a DVD legal frame size and you you crop 4 lines, add 4 lines when you resize it.

[franco]

Thanks for that. The overscan does show up on my PC in WinDVD. I am cropping it while encoding so I don't know what you mean by resizing it after that. Resizing while authoring?? Anyway, I just don't want to crop if it won't play in peoples DVD players.

[bugster]

If the recommended resolution for PAL DVD-R is 576 x 352

The resolution for PAL DVD is 720 * 756.

Actually there is a small benefit to had by masking the overscan noise with a black bar. Cropping would affect the resolution but masking leaves it the same and replaces the overscan noise with a black bar. This black bar requires much less bitrate to encode (hardly any) compared to the overscan noise, leaving more bitrate available for the rest of the picture. The difference may be small but it is there.

[spectroelectro]

Depending on your TV it might even show part of the overscan area, so what the heck, might as well black-bar it out with TMPGenc or (whatever). My 1987 vintage 27" TV actually shows the bottom overscan region onscreen, so for me it actually matters whether I mask out the annoying bottom 9 pixels of sync lines on the MPEG-2.

[The_Doman]

I am using also Procoder for my VHS conversions.

I encode them at full resolution (720x576) and crop 16 pixels from all sides so it will hide the typical VHS lines and other noise in the borders.
If you make sure SCALE AFTER CROP is turned off, Procoder will fill the cropped area with black and won't resize the picture.

[franco]

Thanks Guys, great tips

[franco]

I am using also Procoder for my VHS conversions.

I encode them at full resolution (720x576) and crop 16 pixels from all sides so it will hide the typical VHS lines and other noise in the borders.
If you make sure SCALE AFTER CROP is turned off, Procoder will fill the cropped area with black and won't resize the picture.

I'm having a problem with this. When I deselect "scale after crop" and change the values to crop the top, bottom or sides it automatically changes the resolution from 720 x 576 to another value.

An example is if I choose to crop left and right by a value of 4 pixels the 720 x 576 is changed to 712 x 576. Is this right?? I'm not sure my scale after crop is turning off even though I am deselecting it.

[The_Doman]

An example is if I choose to crop left and right by a value of 4 pixels the 720 x 576 is changed to 712 x 576. Is this right?? I'm not sure my scale after crop is turning off even though I am deselecting it.

Yes that is correct..
Procoder will then fill the cropped area with black. Best is to use for cropping values multiples of 16 or 8.

When you selekt the CROP after resize then the cropped picture will again be resized to the full resolution. You definitely don't want that!

[franco]

Thanks, Doman