VLC - Playing at fps not specified in file

[robdonn]

I received a video file from a work colleague that plays at a normal speed in VLC without any modifications needed, but the problem is that it shouldn't.

The file is encoded at a frame rate of 9.283771 fps giving it a length of about 8 minutes, an error obviously happened at some point during encoding, but VLC plays it normally and shortens the time to about 3 minutes. No other software can do this, I've tried Adobe Premiere and After Effects and both playback at the slower speed.

Is there any way that I can find out what frame rate VLC is using to achieve this so I can try to replicate it elsewhere? When I go into the Codec Information in VLC it shows the file's slow frame rate, not the one it is actually playing at.

[Rémi Denis-Courmont]

VLC is not using a frame rate. It uses per-frame time stamps. So your question makes no sense.

[robdonn]

VLC is not using a frame rate. It uses per-frame time stamps. So your question makes no sense.

Ah, I didn't know that. Ok, I'm not going to pretend to fully understand it, but it's an answer.

Thank you.