I capture PAL interlaced video using an ATI AIW via VirtualDub. I use Huffyuv compression, and the resulting video file is Top Field First (a function of the capture card). The target viewing device is a TV.

After post-processing, trimming etc. I want to convert the Huffyuv video file to DV format (Bottom Field First).

I use the Reverse Field Dominance filter and DV compression in VirtualDub, and the resulting DV video plays fine on the computer monitor. Using the ViewFields VirtualDub filter I can see that the fields have gone from TFF to BFF.

What I'd like to know is:
1. Is this an acceptable way to do the TFF to BFF conversion, and am I losing anything in the way of quality by not using something like ProCoder instead?

2. Why, when I view the fields in VirtualDub using the ViewFields filter, does the field in the bottom half of the output pane change first for a TFF video, and the top half change first for a BFF? Anyone else noticed this? FYI: No other filters or field swapping is selected.

Thanks