Chapter / Scene thumbnails TC

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Hi,

I just finished editing my entire movie collection so that the chapter timecodes match i-frame/scene changes. A lot of remuxes have chapters at the wrong timecodes (sometimes showing half a frame from the previous scene, etc.).

I used AviSynth with the FFmpeg plugin to check each frame along with its type (intra, predictive, etc.) and its timecode.

The problem is that Jellyfin and Kodi don’t show the same frame I see in AviSynth.

For example, here's the first chapter from The Departed

• In Jellyfin, the app seems to use the correct iframe.
  
• In Kodi (CoreELEC), it shows yet another frame, which seems to be the previous i-frame.
  

AviSynth (AvsPmod) : Frame 7268
   

Kodi : (I don't have the exact Kodi screenshot, but this is the frame I can see) Frame 7250
   

Jellyfin : Seems to show the same frame as AviSynth
   

For example, here’s the end credits chapter :
AviSynth (AvsPmod) : Frame 208309
   

Jellyfin : Frame 208313 I guess
   
   

MKVToolNix Chapter :
   

So in both players I get different behavior, and sometime it seems Jellyfin pick up the next iframe.
Do you have any idea how to fix this 'issue' ?

Script :

Code:

import("C:/Users/Nicolas/Downloads/Tools/AvsPmod_64/ffms2-5.0-msvc/FFMS2.avsi")
LoadPlugin("C:/Users/Nicolas/Downloads/Tools/AvsPmod_64/ffms2-5.0-msvc/x64/ffms2.dll")
FFVideoSource("C:\Users\Nicolas\Downloads\The Departed (2006).mkv")
FFInfo(framenum=true,frametype=true,cfrtime=true,vfrtime=false,version=false,cropping=false,colorrange=false,colorspace=false,sar=false)

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