Altering Pulldown variables

[Theagg]

This isn`t catered for by the look of it in DVD2SVCD.

Is there any way to enter the required variables into the ini file if so desired, or another way to change the final muxed DVD2SVCD output file ?

Example...rather than odd fields, I require even fields set in the pulldown process. Pulldown operates with "odd" as default. There is no tick box to set options like this..hmmmm

[markrb]

The only way I know to do this is to make sure you have don't delete files checked, run DVD2SVCD past pulldown, close DVD2SVCD, run pulldown.exe manually and then use Recover from after pulldown. Other then that there is no way I know of.

Mark

[Kedirekin]

I can confirm that markrb's suggestion does work - I've done it several times. You can even copy and modify the pulldown command from the dvd2svcd log file and paste it into a command prompt window. Crash recovery after pulldown typically takes less than ½ hour (at least, on my PC it does).

[markrb]

Out of curiosity when and how do you know you need to change this setting?

Mark

[Theagg]

That method does work, thanks.

As to why I would want to do that, I`m just trying to solve the massive headache inducing problems I am having with removing combing artifacts from the final muxed file. ( combing whic is present in the source file )

The source file is a Divx (23.976fps) which has obviously been telecined. Applying the Telecide filter in DVD2SVCD does a reasonable job of removing the combing in the pre pulldown, pre muxed file ( the one stored in the "video" sub folder in DVD2SVCD file structure ). However, the final muxed file, the one after pulldown has been executed ( stored in pulldown folder ) has regained the artifacts !! So pulldown reintroduced the combing ! Trial and error using just Avisynth, CCE and Pulldown alone, seemed to show that setting the "even" flag in pulldown eliminates most of the combing, irrespective of wether Telecide filter is used or not.

The downside, I have just discovered, is the setting the "even" flag in pulldown seems to speed up the video stream, so that the video now runs ahead of the audio at an increasing rate in the final muxed file.............arggghh !!!

End result, I still cannot seem to succesfully remove the combing AND keep the audio in sync.

[Kedirekin]

As far as I know, the only time you need to run pulldown manually is on an NTSC encode (no IVTC, no Force Film) that got the wrong field order by default when CCE encoded it. I run pulldown with the nopulldown option. It's largely trial and error.

You should never need to re-run pulldown when the source is 23.97 fps with zero combing. The FRR/TFF flags simply can't screw up progressive frames.

As for trying to fix things when you have a 23.97 fps encode that does have combing artifacts, I think it is futile. No matter which field is first, the combing combined with the RFF/TFF flags is likely to result in a temporal back-forth-back or forth-back-forth field effect. Better to deinterlace or just encode it as NTSC.

@Theagg,

You mention the combing comes back after pulldown. This is fundumental to what pulldown does. The RFF/TFF flags that pulldown inserts tells the decoder to combine fields from different frames. It's telecine-on-the-fly, if you will. You can't have pulldown without combing - it's a contradiction of terms.

If you plan to watch the video on your PC, don't apply pulldown. If you plan to watch it on TV, apply pulldown and relax - you won't see any combing on the TV (because TVs only display one field at a time). If you plan to watch it on both, either live with the combing, or do two different encodes (one with pulldown, one without).

If you absolutely can't live with combing and you need to watch it on both, I'd explore doing telecide combined with decimate(mode=1), encode at 29.97 fps, and skip pulldown all together. If I understand decomb properly, decimate(mode=1) will create an intermediate frame that is a blend of the frame before and the frame after where it normally would have removed the frame. This is similar to telecide without decimate, but instead of a blunt repeat of one frame in five, you get a smoother transition (because of the blend).