R1 Star Trek Deep Space Nine framerate issues

One solution to this is to force the rip to stay at 30000/1001 fps, instead of trying to deal with the changing film/video sections. You’d have to re-encode to get the best quality, because you’d have to do some processing that keeps the video at the same frame rate while cleaning up the interlace artifacts.

What you don’t want to do is let the Kodi or the Vero 4K chipset try to do the cleanup themselves, because they might pay attention to the “duplicate field” flags, and attempt to change the output frame rate, which is what causes the problem.

Think I’ll pass on re-encoding 170+ episodes! If I’m that keen to watch them, I can simply use a Pi with OMX player enabled as that runs at a fixed framerate based on what it detects at the beginning. My testing with Kodi 18 was limited but based on a short test, it was performing correctly.

how to solve synic issues?

I have no issues with any of my native-format content. 24p conversions via Handbrake have generally been fine as well but these days I stick with native content as I long since stopped buying R1 DVDs.

I happen to have the DS9 R1 box set that I ripped using MakeMKV, with no additional processing, so my copy should be identical to yours.

I hadn’t watched it in a while, so I decided to watch S01E01 and I can confirm that there is an issue. I had thought it was fixed a few months ago, but I never actually watched this one to test the fix. I had the same issue with Little House on the Prairie so that’s why I thought the issue was fixed.

Does your mediainfo look like this:

Duration                                 : 1 h 30 min
Bit rate mode                            : Variable
Bit rate                                 : 5 280 kb/s
Maximum bit rate                         : 9 800 kb/s
Width                                    : 720 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 4:3
Frame rate mode                          : Variable
Frame rate                               : 24.121 FPS
Original frame rate                      : 29.970 (30000/1001) FPS

Do you have the same problem with later episodes? I did some spot checking, and it seems that the issue is on the first 3 seasons. Starting with Season 4, the problem does not happen for me.

One thing in the mediainfo that caught my eye, from S01E01:

Scan type                                : Progressive
Scan order                               : Top Field First
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.633
Time code of first frame                 : 00:59:58;04

and from S04E01:

Scan type                                : Progressive
Scan order                               : 2:3 Pulldown
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.601
Time code of first frame                 : 00:59:58;00

Notice the scan order?

Apologies for a belated reply, yes my mediainfo matches yours. I suppose there are authoring issues here? I only looked at a few episodes and I recall that later ones did not seem to have the problem. I guess it’s unlikely these will ever be re-built as per the TNG blu-rays, but it looks like it won’t be that long until Kodi 18 is stable enough for general use, and that seems to cope better.