Removing consecutive duplicate frames

[marius2du]

Hello,

I have a 60 fps source video in which some sections appear to be with duplicate frames.
I am using the following command to "cleanup" the parts with duplicate frames and to keep audio in sync:

ffmpeg -i input.mp4 -vf mpdecimate -vsync vfr out.mp4

When I run resulting video, the player will speed up at the section where duplicate frames where removed.
What am I doing wrong ?
Thank you.

[Selur]

Probably nothing, mpdecimate is a video only filter, it does not touch the audio at all.
There are projects like https://github.com/KenjiTakahashi/mpdecimate_trim which try to keep the audio sync, but afaik. there is no option for this directly in ffmpeg.

Cu Selur

[jagabo]

Maybe your player doesn't handle variable frame rate properly?