Perfect NTSC to Pal conversion?

andy

Hi
I encoded an NTSC avi File into pal.
When I watched it as NTSC, my DVD player does the conversion internaly, but that leads to skipping some frames, to have the 25 fps.
I suppose thats the fastest method to do realtime conversions.
Now I encoded it again, but this time, directly as PAL.
Now, I have less skipping, but its still not smooth.
It has regular skip every one second or so.

I choose 25 as fps, 720x576 as resolution (for the dvd) and chose PAL as video format. And I chose as max frames for GOP 15.

Is there another option which I may have not checked, to increase smoothness?

And one question... what is the Profile amp; Level option?
Does it affect playback on standalone players?
thx

there are some avisynth scripts for pallt;-gt;ntsc

1st question is if you can live with a speed change of 4%

I can.
I did not notice a change in audio pitch, or desynchronisation.
Only thing that bothers me are the regular frame skips.

so if it is 24fps (or telecined) material just do the speed up and resolution change in avisynth (besweet for the audio)

Hi again.
Im still having this skip... looks like every second one frame is skipped...

@E-Male
The source is 23.76 NTSC, and I konvert it to 25 fps.

i see no reason AssumeFPS would cause problems like this

I think that just the way tmpeg does the conversion... could it be right?

looks like every second one frame is skipped...

This happens if TMPGEnc is doing the Framerate-Coversion. But there's no need to do that. Use a AVISynth-Script with AssumeFPS(25) or activate quot;Do not frame rate conversionquot; in Settings -gt; Advanced (TMPGEnc). Both ways will work propperly, but you have to SpeedUp die Audiopart separatly.

Yes, but I want to avoid the speed up

But why? That's the Standard-Technique for storing Film-Source on PAL-DVD.
If you want to avoid the Frequency-Change as a result of the speedup, use a good Tool like WaveLab which is able to do the speedup without pitching the sound.

I use VirtualDub to speed the Source framerate up to 25fps (film ends up slightly shorter) and besweet/softencode to alter the audio.

Tmpgenc duplicates a frame at the end of every 24 to get the  25fps, it looks awful!

As said above, this is how the studios do it and I don`t have any problems watching the pal versions.

Ok, I will try it, and then compare it to my pak version

Did it... works great...
I converted the audio using the 23.976 --gt; 25.000 preset in BeSweet.
I notice a slight increase in the pitch... how can I decrease it again?

I converted the audio using the 23.976 --gt; 25.000 preset in BeSweet.
I notice a slight increase in the pitch... how can I decrease it again?

By not using BeSweet. I'm doing this with WaveLabs Time correction. Set the Speed to 95.904 and choose High Quality. That's all. The Audio-Part will have toe correct lenght without any Pitching (sounds exactly like the original)

The easiest way to convert NTSC to PAL or vice versa is using VirtualDub as a frame server.

Due to the basic editing featurs of VirtualDub it is also possible to cut the source. Link:

projects/virtualdubmod

I just tried the demo of wavelab 5, and it cannot open ac3 files.... my audiosource is ac3, though, just 2 ch.

Well, in this case you should separate video and sound. The AC3-sound could be multiplexed later unchanged with the reencoded movie using the MPEG-tools within TMPGEnc.

Yes, but after, demuxing, it has the ac3 filetype... I could ocnvert it to wave with besweet, without chaning the speed.
@Wavelab....
Somehow, I just cannot klick on apply in the time correction dialogue...

Originally posted by FirstBorg
Yes, but after, demuxing, it has the ac3 filetype...

Well, yes. So, what? Simply multiplex it with the new encoded MPEG-Stream.

No, because I have to convert this ac3 file. But the conversionprogram, cannot read ac3... got it?