Convert 29,976 (NTSC) to 25,000 (Pal) AVI

[volker028]

Hello guys,

my problem is i have a avi file with 29,976 FPS (NTSC) that i want to convert to 25,000 FPS (Pal). I tried virtualdub but the result video is very choppy. Is there a way with avisynth (script) that makes the video better?

Thx for the help.

Volker from Germany

[jman98]

Why do you want to do this? NTSC to PAL conversions are almost never needed in Europe as most TVs can play NTSC video without problems.

I don't do conversions between PAL and NTSC, but I do know that such conversions usually have artifacts in motion scenes.

[jagabo]

If the video is telecined film you want to inverse telecine back to 23.976 fps film frames and then increase the frame rate to 25. VirtualDub can do it without making the video choppy. Just go to the frame rate dialog and set the source frame rate (the top portion of the dialog) to 25. Note that this also changes the running time so the audio length has to be adjusted too. VirtualDub's advanced audio filter can do that too.

If the video is interlaced it's more difficult. Your best bet is a good bob deinterlace (Yadif) to 59.94 fps, decimate to 50 fps, then reinterlace. You can do that with VirtualDub too. It will leave the video a little choppy.

If you're making a DVD you also have to change the frame size.

[volker028]

Thx for the fast reply

i got the first step to 59.94 FPS but i can't get it to work with decimate. I have the plugin in virtualdub but the avs output gives me 29.976 FPS again

Can someone give me an example avs script ?

Thx for the help again

Volker

[jagabo]

For 29.97 fps interlaced to 25 fps interlaced:

WhateverSource("filename.ext")
Yadif(mode=1, order=1) # order=1 for TFF, order=0 for BFF
ChangeFPS(50) # decimate from 59.94 fps to 50 fps
LanczosResize(720,576) # resize as appropriate
AssumeTFF() # for TFF output
SeparateFields()
SelectEvery(4,0,3)
Weave()

For 29.97 fps film to 25 fps progressive (audio length must be adjusted):

WhateverSource("filename.ext")
TFM()
TDecimate()
LanczosResize(720,576) # resize as appropriate
AssumeFPS(25)

[volker028]

THX jagabo it worked

Greets Volker