Autodesk Wiretap Central (ffmpeg based) 4:1 issue

[Motawm]

So we use the autodesk product Wiretap Central to do encodings from out flame suites. It's essentially just a front end for FFMPEG and allows you to create custom profiles via editing an XML file and sending through your own syntax.

I'm having an issue creating an NTSC mpeg2. I see there have been a few discussions about 3:2 pulldown and ffmpeg not supporting it (yet) but they are all pretty old posts. Does anyone know if it supports it now? I couldn't find anything in their documentation about it.

Basically, the source material is 23.98 and I'm using the "dvd-ntsc" output for ffmpeg which seems to give me a 29.976 clip but it's not adding correct 2:3. The cadence is 4:1 which means it's very, very stuttery.

I've tried straight burning a 23.98 file and letting the DVD player add the pulldown but it seems I end up with the same problem. From my understanding you can add a 'soft' 2:3 switch in 3rd party applications which then tells the decoder to add the 2:3.

Ideally, I'd like to get this done in ffmpeg though as it saves re-transcoding the files. (Wiretap Central is the only way you can talk to the flames StoneFS filesystem)

Any suggestions?

[guns1inger]

Encode to 23.967 fps with ffmpeg, then use DGPulldown to add the correct pulldown flags to the video stream prior to authoring.

[Motawm]

Perfect, that looks like it just adds the flags and doesn't bother with a re-encode.

Thanks!