[FFmpeg-user] How to set interlaced encoding for interlcaed DNxHD formats (220x/185x/220/145/120)?

[Andy Furniss]

Andy Furniss wrote:
> Christoph Gerstbauer wrote:
>> Hello,
>>
>> I have the problem that I cannot set interlaced as encoding format for
>> DNxHD 220x/185x/220/145/120
>> I think I use the wrong syntax for setting the field order:
>>
>> -vf "setfield=1"
>> or
>> -top 1
>>
>> both are not working.
>
> May not be any help with dnxhd but I made some x264 recently and had to
> "say" twice like -
>
> -i infile -vf setfield=tff .... -x264-params "...:tff=1:..." ...


http://www.itbroadcastanddigitalcinema.com/ffmpeg_howto.html#Encoding_VC-3

says use -flags +ildct (I guess you may need both setfield and top= (or 
something as well)