Vapoursynth: Deinterlacing and Frame Rate

[jay123210599]

I have a DVD video with a frame rate of 25fps. Then I deinterlace it with vivtc and now it's 20fps. Now I want to convert the frame rate of the deinterlaced video to 23.976fps to increase the number of frames. How do I do that?

[Columbo]

If it's 25 fps it's likely not telecined, so why are you applying vivtc?

[jay123210599]

If it's 25 fps it's likely not telecined, so why are you applying vivtc?

It is telecined.
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings : BVOP
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=13
Format settings, picture structure : Frame
Codec ID : V_MPEG2
Codec ID/Info : MPEG 1 or 2 Video
Duration : 26 min 26 s
Bit rate mode : Constant
Bit rate : 6 500 kb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Original display aspect ratio : 2.39:1
Frame rate mode : Constant
Frame rate : 25.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.627
Time code of first frame : 10:00:12:00
Time code source : Group of pictures header
GOP, Open/Closed : Open
Stream size : 1.20 GiB (97%)
Default : Yes
Forced : No
Color primaries : BT.601 PAL
Transfer characteristics : BT.470 System B/G
Matrix coefficients : BT.470 System B/G

[Selur]

according to the info you posted:
Scan type : Interlaced
Scan order : Top Field First
it's interlaced, it might be some exotic stuff (see: https://forum.doom9.org/showthread.php?t=176104), but it's not straight telecined,..

[jay123210599]

according to the info you posted:
Scan type : Interlaced
Scan order : Top Field First
it's interlaced, it might be some exotic stuff (see: https://forum.doom9.org/showthread.php?t=176104), but it's not straight telecined,..

It's a French DVD

[Selur]

PAL content usually isn't telecined and Frensch DVDs are usually not,....

[Columbo]

Maybe he needs field matching but not decimation. That is sometimes encountered in PAL land.

@jay

Please give us a representative source sample.