Drop/Remove Frames

[color]

I am going crazy here, math is not my strongest side, so If someone can help me. I got a movie that dublicates (wrong frames) the hole movie (25 fps). So I need to drop frames/remove this frames. I don't know how to figure out the first frame that needs to be deleted, but when looking a bit in the movie, I get that this frames between 2518-2550 this must be removed:

...
2518
2520
2523
2525
2543
2545
2548
2550
...

[DJATOM]

Probably not so optimal solution, but assuming pattern doesn't changes the whole movie (python code below)

int(2518/25) = 100
100*25 = 2500
frames="""2518
2520
2523
2525
2543
2545
2548
2550"""
frames=frames.split('\n')
frames2=[int(i)-2500 for i in frames]
"""frames2 will have initial section, which is"""
[18, 20, 23, 25, 43, 45, 48, 50]

[color]

Originally Posted by DJATOM

Probably not so optimal solution, but assuming pattern doesn't changes the whole movie (python code below)

Its the same pattern in the full movie. I do however use avisynth.

[DJATOM]

Originally Posted by color

I do however use avisynth

No problem with that. Python3 is handy interpreter for small calculations (and more).

[Sharc]

Originally Posted by color

Its the same pattern in the full movie. I do however use avisynth.

Have you tried the avisynth filters 'Dup' or 'DeDup' or 'ExactDedup'?
If the pattern is regular you could probably also use Selectevery(…).

[manono]

Originally Posted by Sharc

Have you tried the avisynth filters 'Dup' or 'DeDup'?
If the pattern is regular you could probably also use Selectevery(…).

Or TDecimate.

There might not be enough information supplied yet to be sure, but it seems there are 4 duplicate frames in every 25. If so, the TDecimate syntax goes:

TDecimate(Mode=0,Cycle=25.CycleR=4)

Again, as Sharc says, this relies on the pattern being regular. And the result is 21fps, an odd framerate unless, maybe, it's a silent film.