I somehow messed up a h.264 stream's properties => stuttering

[antoniu200]

Hello,

Long time no post. I have been doing pretty well with the AV stuff since, but now I need some help.

I record various movies and series from DVB-C TV, then use AviDemux to trim and remove ads. I save them as MKV, usually. Most files work wonderfully after, with no problems (unless the coax transmission went wrong somewhere).

But this file that I encoded in the 6th of May while also studying for uni, I managed to mess up - no clue how, I can't remember what I did. The resulting file stutters and loses frames in MPC-HC with LAV Filters 0.78.0 and Windows Media Player. Tried using different MPC-HC and LAV Filters versions, tried playing the file on a different PC (to avoid bad config on my side), but no avail.
Also tried using FFmpeg to copy to MP4, tried forcing FPS, timecodes and fixing bitstream info with MKVToolNix.
The file seems to play just fine on my Blu-ray player and the TV decoder, however.

Unfortunately, I do not have the source .ts file for this recording to re-trim it, so I have to find a way to fix it.

While analysing .ts sources and previous cut videos from the same TV channel using MediaInfo, I notice two wrong parameters:

Frame rate mode                          : Variable (should be Constant)
Scan type, store method                  : Separated fields (should be Interleaved fields)

The TV channel definitely did not change these two parameters just for a day, to change them back the next day, it would make no sense, so I definitely changed them somehow.

Here are two video samples, one correct and one from the video that I botched: https://drive.google.com/drive/folders/1...JDXjkgQRS7
The stuttering on the botched one (7x14) is most obvious during the fade in animation.

Any advice?

Thanks a bunch!