24fps DVD & CCE related question

Hi,

I have a capture from a VHS tape that is at 29.97fps. Since it's a film source I'd like to do IVTC on it and encode internally at 23.976fps, while kepping it 29.97fps for the DVD Standard. CCE has such option, but the result isn't good as it doesn't manage to reconstruct the progressive frames properly.

Is there a way to frameserve at 23.976fps (let's say from Avisynth who does a great IVTC) and set CCE to put the proper flags in the MPEG so it would be according to the DVD standard?

Thanks in advance

[bugster]

Don't know if CCE will do what you ask (I don't use it myself) but there is a command line program called pulldown.exe (in the tools section I think) that will allow you to add the 3:2 pulldown flags to a video only (.m2v) stream after encoding.

Hope this helps.

It isn't in the tools section (should be added!) but found it here:
http://www.digital-digest.com/dvd/downloads/pulldown.html

Thanks for the help!

I tried the program, but at least from what I see on the computer screen, instead of doing 2:3 pulldown making some frames interlaced when placed back, it only reapeats every 4th frame and video is still progressive...

Any idea anyone?

[DJRumpy]

You need to perform IVTC on the source file, either using the option in CCE, or by pre-filtering the AVI. You can do this, either with VirtualDub, or AVISynth.

PULLDOWN.EXE is used to make a video at 23.976 appear as 29.97 frames per second (Telecine) by adding pulldown flags to the MPEG stream. Running this on an NTSC 29.97 fps video will just give you a mess, or do nothing.

If your familiar with VirtualDub, you can open the AVI there, and from the VIDEO menu, select VIDEO | FRAMERATE. Set the "Inverse Telecine (3:2 pulldown removal)" to "Reconstruct from fields - adaptive". Save your output as either a new avi, or frameserve it directly to CCE.

If you prefer to use AVISynth, then I would suggest you get the DECOMB filter from DGraft's site ( http://shelob.mordor.net/dgraft ). The docs are included with the filter. This will feed a video that is 23.976 to CCE using the decomb filter.

Once you've encoded your video in CCE, THEN you can run PULLDOWN.EXE on the file, to make it appear as 29.97. This is necessary if your encoding to DVD, SVCD, or CVD.

Seems like a problem with the movie players. In media-player that has the Mainconcept DS filter and with MME (Mpeg-viewer that comes with the TMPGEnc VFAPI MPEG-2 Plugin), both show the 4th frame repeating twice... However, I just tried DVD Maestro and it playes fine.

Anyway, I'll just have to burn it onto DVD-RW and see how it's really playing...

MPEGobsession

[DJRumpy]

If every fifth frame is a duplicate, it could be an NTSC to PAL conversion that was done improperly. Don't reply on viewing the playback. Open it up in VirtualDub, and manully step through it frame by frame to verify what each frame looks like.

Confirmed it now, it's just a problem of the Mainconcept Direct show filter and the TMPGEnc VFAPI plug in. DVD Maestro and VirtualDub show it perfectly...

[DJRumpy]

Then you should be good to go. If it's telecined, perform IVTC (I'd suggest AVSynth, but you may be a GUI type person). AVISynth is the faster option, and far more flexible, but it also has a little bit of a learning curve. Encode in CCE, and then run pulldown.

I was also dissapointed in the 3:2 pulldown detection in CCE. It was a nice feature, that doesn't seem to be very good just yet. The implementation also skews output size, as it's hard to tell how much size will be reduced by the engine as it detects and flags duplicate frames. I'm sure it will improve in future versions, although I will probably never use it. They ask that you don't filter your source before running it, which just isn't feasable with CCE. Their built in noise feature leave something to be desired. They should stick with what they do best. Speed and quality encoding. Leave the filtering/editing to someone else.