PAL to NTSC - keep audio pitch

[sambat]

Converting a PAL avi to NTSC mpeg2 and keep the original pitch, I use 'Timestretch'.
FrameServing from VirtualDub to Quenc, if I elect 'DVD' (which includes the audio) the output fails.
If I elect 'No Audio' I get a good .m2v file.
I note that the audio from the input is now 46034Hz;I'm guessing that this is the problem?
How can I get Quenc to take the audio and keep the pitch.

AVISource("C:\PAL.avi")
LanczosResize(720,368,2,0,572,320)
AddBorders(0,56,0,56)
AssumeFPS(23.976, true)
TimeStretch(pitch=(100.0*25.0)/23.976)

[freebird73717]

Lose assumefps and timestretch from your script and convert the pal avi to ntsc resolution elementary video stream. Run that stream through dgpulldown 25->29.97

Encode audio separately with aften, ffmpeg, besweet ...etc.

You will now have a video stream and audio stream in sync and ready to author to dvd (assuming that is your intent).

Yes it is more steps but it will work flawlessly.

[sambat]

Thank you freebird73717 - that did it.

[freebird73717]

You're welcome.

[Alex_ander]

I note that the audio from the input is now 46034Hz

That's because of AssumeFPS() 'true' parameter for audio. You could restore the sample rate after it:
ResampleAudio(48000)
but it's better to remove 'true' and to do everything in one step by changing tempo and keeping unchanged pitch and sample rate:
TimeStretch(tempo = (100.0*24000.0)/(25.0*1001.0))

P.S. Added back the missing '(', it had been accidentally removed when I'd tried to correct division into lines in the text box.

[sambat]

Thank you Alex_ander.
I take it that the audio is stretched, but the pitch is unchanged?

Why are the numbers 24 and 25 - and not 23.976 and 25?

[Alex_ander]

Here 24000.0/1001.0 is the preferred way of representing 23.976. Probably in AssumeFPS it should be used the same way as in TimeStretch. Sorry for the typo, I've just looked into my saved test script: '(' was in its place.
And yes, pitch is not changed (hopefully, it had been corrected at creating the sped-up PAL version, then you want to keep it). In case you feel the pitch is not correct in PAL, simply resample audio to 48000 without using TimeStretch (keeping 'true' in AssumeFPS).