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]

Originally Posted by Columbo

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]

Originally Posted by 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,..

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.