[FFmpeg-user] Best way to scale interlaced video

[Andy Furniss]

Massimo Battistel wrote:
>>
>>>>
>>>> Do you really need 4:3 aspect?
>>>>
>>
>
> Yes, and with black bars above and below (to keep aspect).

I am confused by this as bars above don't make sense for 4/3, do you 
want to keep 16/9?

If you do want 16/9 you don't need bars as it's usual for 720x576 to be 
anamorphic so just flagged as 16/9 and expanded on playback.