PAL DV to NTSC DV file. Crop or Resize? Opinions.

[rijir2001]

I have a 4GB DV file in PAL format that I wish to convert to NTSC DV. I haven't yet decided on the method of my conversion. But what I was wondering was would resizing the image during conversion, so that I won't lose any image, result in more artifacts later when I convert it to MPEG for DVD? I don't want to crop the image if I don't have to. But I really don't want to sacrifice any quality if I don't have to. This was a clip that I spent a lot of time cleaning up with filters and manually cleaning up over 150 individual frames in Photoshop to remove dropouts and glitches.

I searched the guides and such here but I didn't see this issue addressed.

[manono]

Hi-

But what I was wondering was would resizing the image during conversion, so that I won't lose any image, result in more artifacts later when I convert it to MPEG for DVD?

You can completely ruin the video if you're not careful. It's interlaced, isn't it? So, assuming you intend to keep it interlaced, when resizing you have to do it very carefully so that the field structure isn't destroyed. Using an AviSynth script is the best way to do the resizing. It's also the best way to do the framerate conversion.

[JohnnyMalaria]

You should resize - but using a field-aware algorithm as noted above.

PAL DV frame size is 720 x 576.
NTSC DV frame size is 720 x 480.

But *both* have the same frame aspect ratio (i.e., 4:3 - or 16:9 if widescreen).

If you simply crop from 576 lines to 480, you'll change the aspect ratio....

[rijir2001]

It is interlaced. I will try to resize.

Thanks guys!!