Changing framerate

Mutedblaze · Post by **Mutedblaze** » Mon Jul 14, 2008 9:49 pm

I have a source that has a framerate of 25fps...which i find very odd. I need to change it to 23.97fps and i know there is a way to do this, but i can't figure it out. i've done some researching and the best i could come up with is a pulldown or telecine command in avisynth. I think changing the framerate causes an interlacing problem too, but i'm not sure. Could anybody tell me how to change the framerate without getting laggy or bad quality footage please? If you wrote out a script for me i would love and admire you forever.

jasper-isis · Post by **jasper-isis** » Mon Jul 14, 2008 9:56 pm

If mismatched audio is not an issue for you, then in avisynth you would write:

Code: Select all

assumefps(23.97)

Alternatively, open the file in VirtualDub and go to Video -> Frame rate... and select the second radio button.

These change the fps without adding or removing any frames.

Mutedblaze · Post by **Mutedblaze** » Mon Jul 14, 2008 10:22 pm

I kill the audio anyway so that's not an issue. But when i tried assumefps, and compressed in vdub with lagarith, the video was real choppy. similar result with the alternative method.

Autraya · Post by **Autraya** » Tue Jul 15, 2008 1:28 am

Mutedblaze wrote:I have a source that has a framerate of 25fps...which i find very odd.

it's perfectly normal for PAL sources

and when you slow PAL down by removing frames it becomes choppy as hell.
Do you really "need" 23.97fps? why cant you edit at 25fps? (for a MEP?)

Also since it's PAL if you used Decimate in you script to deinterlace that explains the super jerkiness. Don't decimate PAL. use telecide(1) only or something like fielddeinterlace() or tomsmocomp(1,5,1)

mirkosp · Post by **mirkosp** » Tue Jul 15, 2008 6:52 am

Also, about changing the framerate, I'd say the best code would be

Code: Select all

changefps(23.97)

since assumefps will slow down/speed up the footage to adapt the framerate. Changefps does only a framerate conversion without any frame blending, but just by duplicating or deleting frames.
The other framerate convertion filter would be convertfps, but it will blend frames, that's why I don't like it...blending PAL frames, that are most likely already blended, will look like shit.

Mutedblaze · Post by **Mutedblaze** » Tue Jul 15, 2008 11:43 am

Its not for an mep. I'm using multiple anime in my amv and most of the sources are 23.97fps so i was going to convert the sources that aren't to that framerate. I'm probably going about this completely wrong because i was hoping to eventually enter it into a contest. i hear most contests require 29.97fps, so i was planning on first converting the few sources to 23.97 and then when i finish, change the entire amv to 29.97. I'll try some of these ideas and see what happens though.

Mutedblaze · Post by **Mutedblaze** » Wed Jul 16, 2008 5:48 pm

Ok, using telecide(1) helped a bit, but it still looks pretty choppy. I know the order of the commands affects it so here is what i have

avisource("L:\anime\TsubasaChronicles.avi")
assumefps(23.976)
telecide(1)
bicubicresize(720,480)
killaudio()

does anyone see some problems with this that might mess it up?

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Changing framerate

Changing framerate

Re: Changing framerate