AD&E's guide help : pal to ntsc but 24 fps, +other quest

[WilLoW :--)]

Hi, I have a few questions, as I'll have to work with several sources on my next AMV


-----------1
In AD & E's guide, a script is given to convert PAL interlaced to NTSC...

Converting Interlaced PAL to NTSC (will desync audio, other methods also work)

Telecide()
Decimate(mode=1)
AssumeFPS(23.976)
AssumeFrameBased
SeparateFields
SelectEvery(8, 0,1, 2,3,2, 5,4, 7,6,7)
Weave
LanczosResize(720,480)

What then if I want to edit it in 24 fps ?
does replacing the 23.976 by 24 solve this problem ?


--------2
is there a problem in editing at 24fps and exporting at 24 fps... ?
Why is it necessary to convert back to 23,97 fps?

if one edits at 24fps and export at 24 fps, there is no need then to change the audio and stuf...so what is the problem with this method ?

--------3
If I work with several sources, pal , NTSC, interlaced or not...
What resolution and framerate should I use ? (I guess I have to work at ONE given resolution and framerate under premiere, so changes are needed...)
is an avisynth script sufficient to solve all the problems, or do I still need to stretch the Audio somewhere ?


Thank you

[dj-ohki]

well, the reason the audio was waxed over for that method is because a lot of times, you just ignore the audio in source footage in an AMV.

as for if editing in 24 fps vs 23.976.. if your source is PAL.. keep it at 23.976, since it IS 23.976 AFAIK (24 fps, drop frame, same as NTSC (30fps drop frame))

if you want to display it on a PAL tv.. you're gonna need to convert back to 24 drop, if its solely for usage on computers, keep it at 24.. but i dont see why you just dont edit in drop frame.

now if you're mixing and matching.. id say go 30 fps, drop or not. and upsample everything up to the highest FPS before bringing it into your editing program.

[AbsoluteDestiny]

What then if I want to edit it in 24 fps ?
does replacing the 23.976 by 24 solve this problem ?

Yes

--------2
is there a problem in editing at 24fps and exporting at 24 fps... ?
Why is it necessary to convert back to 23,97 fps?

There is no problem exporting at 24fps. the only reason you'd want to convert it back to 23.976 is if you want to make it a full 29.97 NTSC video by re-interlacing (this is good for cons). 24fps isn't really a standard but in terms of PC playback, there's nothing wrong with 24fps at all.

if one edits at 24fps and export at 24 fps, there is no need then to change the audio and stuf...so what is the problem with this method ?

None whatsover - it's a matter of choice. I really need to make that more clear that 23.976 only really has advantages if you need to get to an NTSC standard at any point.

--------3
If I work with several sources, pal , NTSC, interlaced or not...
What resolution and framerate should I use ? (I guess I have to work at ONE given resolution and framerate under premiere, so changes are needed...)
is an avisynth script sufficient to solve all the problems, or do I still need to stretch the Audio somewhere ?

The good thing about progressive 24fps is that it's easy to get everything the same. So you deinterlace PAL (if it's interlaced) and force it to 24fps, you IVTC ntsc footage and make it 24fps and then everything is fine. the only difference will be the size - I'd resize everything to 720x480 but there's nothing wrong with the PAL resolution if you want to scale the NTSC footage up for editing.

The res doesnt really matter as much as long as they are the same.

The aviscript for your source footage will be fine, unless you are using the actual dvd audio from the PAL source anime. If you are using the audio from the PAL source then the framerate change will lose the audio synch.

[WilLoW :--)]

Thank you very much to both of you.

[RadicalEd0]

Dont dismiss 23.976fps, if you or any of your viewers want to put this on vcd, svcd, or dvd they're going to have to jump through some unpleasant loops to get there. It's pretty much always better to use 23.976 over 24 and it's only one step extra.

And most of what dj-ohki said was wrong :\ no offense ^_^;
PAL is 25fps, so like AD said you should slow it down to 24/23.976 fps and IVTC the ntsc footage to 24/23.976. Making everything 29.97 fps will either A. (telecined ntsc or pal) speed your video up alot, B. (same) insert a bunch of frames making it choppy, C. (just ntsc) leave you with a deinterlaced video instead of a pretty ivtced one.

[WilLoW :--)]

Sorry for the necropost, but I tried recently, and I've had some unexpected results...

Telecide()
Decimate(mode=1)
AssumeFPS(24)
AssumeFrameBased
SeparateFields
SelectEvery(8, 0,1, 2,3,2, 5,4, 7,6,7)
Weave
LanczosResize(720,480)

With this method, I end up with a 720*480@30fps movie.if I use the original script (replacing the 24 with 23.976), the movie is at 29,976 fps...I guess that If if want some 24fps movie, I have to add another line to the script, which becomes :

Telecide()
Decimate(mode=1)
AssumeFPS(23.976)
AssumeFrameBased
SeparateFields
SelectEvery(8, 0,1, 2,3,2, 5,4, 7,6,7)
Weave
LanczosResize(720,480)
AssumeFPS(24)

Is it correct ? I have the impression that this script deinterlaces my video, then reinterlaces it to ntsc at 29,976, then I remove some frames in the wrong way...


I want some deinterlaced 720*480@24fps from my interlaced PAL DVD...
Here's the script I imagine would be better :

Telecide()
Decimate(mode=1)
AssumeFPS(24)
LanczosResize(720,480)

Am I right this time ?

thank you.

[AbsoluteDestiny]

The selectevery, weave combination makes interlaced NTSC footage from 23.976fps progressive sources.

To make a pal movie 24fps you need to deinterlace (if required) and convert to 24fps using AssumeFPS(24). That last script you quoted will be fine.

[WilLoW :--)]

Thank you AD.

[trythil]

There is no problem exporting at 24fps. the only reason you'd want to convert it back to 23.976 is if you want to make it a full 29.97 NTSC video by re-interlacing (this is good for cons). 24fps isn't really a standard but in terms of PC playback, there's nothing wrong with 24fps at all.

"Not a standard"? Doesn't film run at 24fps?
That seems pretty standard to me...

Do you mean broadcast standard?

[WilLoW :--)]

There is no problem exporting at 24fps. the only reason you'd want to convert it back to 23.976 is if you want to make it a full 29.97 NTSC video by re-interlacing (this is good for cons). 24fps isn't really a standard but in terms of PC playback, there's nothing wrong with 24fps at all.

"Not a standard"? Doesn't film run at 24fps?
That seems pretty standard to me...

Do you mean broadcast standard?

I think that the standards are 23,976fps or 29,976fps for NTSC, and 25fps for pal...