29.97 fps to 25 fps, what the best method

[MarkRaff]

I've done quite a lot of avi to dvd conversion, and always managed to stay away from having to change fps as my standalone dvd player will play either PAL or NTSC. However, I am currently putting togather a DVD with 5 episodes of a programme which are currently downloaded avi's. Unfortunately 4 are PAL and 1 is NTSC 29.97 fps, so I need to change the framerate so they are all the same. I believe that it may need resizing too. From what I have read, there are a few different ways of doing this, but it does tend to result in "jumpiness". In people views, what is the best method of doing this? I am using TPMG to encode and author.
Thanks,
Mark.

[thor300]

Be prepared for quality loss. Tmpgenc can convert it directly, select a PAL template and it will both framerate convert and resize. You may need to frameserve or get a mpeg2 plugin for tmpgenc.
The harder and better way would be to inverse telecine, then speed up the audio/video to 25fps. You find it under tmpgencs advanced settings tab.

[MarkRaff]

The harder and better way would be to inverse telecine, then speed up the audio/video to 25fps. You find it under tmpgencs advanced settings tab.

So how does this work? Which template do you use before selecting this option, then what would be the best way to speed upto 25fps after?

Cheers

[adam]

It's not any harder to do it the right way, it just takes longer to encode and isn't guaranteed to work.

All you have to do is load the PAL DVD template and then on the advanced tab enable the "do not framerate convert" filter and the inverse telcine filter; which you can setup just using the default options. You want to set it to inverse telecine to 23.976fps. What this will do is first inverse telecine to 23.976fps, and then speed it up to 25fps. The inverse telecine will only work if the footage originated as film. If your source didn't originate as film you will get jerky video and possibly interlacing artifacts.

You will have to process your audio and video separately so in TMPGenc just set it to export video only. Then you can use something like BeSweet to convert your audio, and enable its NTSC->PAL option. This will properly speed up your audio to PAL.

Then just multiplex your audio and video streams using any multiplexor, like the one in TMPGenc's mpeg tools.

[FulciLives]

Xesdeeni has a method that uses AviSynth scripting to convert NTSC 29.970fps to PAL 25fps and the AviSynth script can be used with TMPGEnc or CCE etc.

http://www.geocities.com/xesdeeni2001/StandardsConversion/

You want the section on there entitled, "VII. NTSC (Video) DVD (29.97i Fps) -> PAL DVD (25i Fps)"

Note that this method is for a DVD but with a small adjustment works for AVI as well.

Also Xesdeeni's SmoothDeinterlacer AviSynth plug-in works best with AviSynth 2.08 not the newer 2.5x versions.

- John "FulciLives" Coleman

[Billie]

Xesdeeni has a method that uses AviSynth scripting to convert NTSC 29.970fps to PAL 25fps and the AviSynth script can be used with TMPGEnc or CCE etc.

http://www.geocities.com/xesdeeni2001/StandardsConversion/

The method described on Xesdeeni's site didn't work out for me, it resulted in jerky videos.
Instead I used Donald Graft's avisynth-plugin "Decomb". Unfortunately I didn't save the script so I can't give more detailed hints here, but the tutorial coming along with Decomb helped me a lot. The 29,97 fps/NTSC DVD I converted to PAL now works perfect!
You'll find the Decomb package here:
http://neuron2.net

[MarkRaff]

Right, I've tried using TPMG to telecine and then speed up using the method above (selecting inverse telecine filter and do not framerate convert option in advanced tab) and used Besweet to convert my audio WAV file to AC3 using the 23.97 > 25 fps option, and then authored using tpmg. The video is fine with no jumpyness, and the audio seems OK as well ecept for it is slowly going out of sync (only a few seconds by the end of 1 1/2 hours). Have I done something wrong (I assume so!!)
I haven't tried the AVISynth method yet as I've never used it before and still have a bit of readingup on it first!!!