The command you need is interleave.
Bring up a Soft Comand prompt, from your start menu.
If you haven't used Soft Command Prompt before, click the top right corner to set properties. You will want to increase your window buffer size to something like 500, so you can scroll better. You can resize window and change text color too etc.
cd to directory with frames. Let me know if you need instructions on how to move around on disk from command line.
Type interleave. This will show all of your options. Square brackets you must put, and sharp brackets are options.
It will take some tests to know what settins you need. I suggest making a ball go back and forth (horizontally) for a few frames, so fields are obvious. Make an animation without fields first to compare. You will have to test in your rendering parameters on the render page, wheather you need odd or even for your work. So do one for both. Then you will have to test with and without -i option. In all you will have 5 animations. One without any fields. Then one render odd and with i on and off, and one rendered even with i on and off.
- From the options you will probably be typing something similar to the following
interleave filename newfilename -f -i -s 1 100 1 -v
filename = field frames
newfilename = output file from both fields.
-f = to look for fields
-i = use even for first field instead of odd.
-s = specify a sequence
1 = start frame
100 = last frame
1 = step value
It looks a little invovled, but if you just do all 5 animations and compare, you should be able to pick proper parameters for you video hardware.
Hope this helps.
Urp