https://bugs.kde.org/show_bug.cgi?id=491257

--- Comment #9 from Martin Bolding <martin.bold...@gmail.com> ---
Thanks for that additional info. I didn't realise it was an issue reported with
other GoPro products or that it was potentially an issue with MLT not reporting
that it had determined that the file had a variable frame rate.

As you may know, GoPro fusion footage has to be "stitched" (using "GoPro Fusion
Studio") to create a single .mov (or .mp4) file for each clip prior to futher
editing. Opening the "raw" front and back camera files, MediaInfo reports a
constant frame rate of 23.976 but, after stitching, (I agree that) the reported
frame rate *mode* is "variable" (despite the stitching process being spatial
not temporal). Possibly a bug in the GoPro code or its subcomponents (which
hasn't been changed since  2018).

My issue may well be that Fusion Studio is incorrectly flagging the output as
VFR, a fact which has hitherto been ignored (or at least not reported by) MLT.

As long as I can continue to use kdenlive to edit my footage (albeit with a
warning about clips being flagged with variable frame rates), I'll be happy.
I have certainly never noticed any judder on the output from kdenlive with
frames being dropped, repeated or interpolated to give me a constant 23.976
output.

I'll maybe stick with 24.05.0 for as long as I can. I definitely DON'T want my
clips to be temporally converted on input.

Thanks again.

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