Frame rate confusion

Just let it all out, buddy. You're among friends here.
Post Reply
dirtyjohn_lv
Posts: 388
Joined: Sat Oct 29, 2011 22:24
Location: Las Vegas, NV

Frame rate confusion

Post by dirtyjohn_lv »

Most of the video I've converted make sense afterwards.

Tried using Adobe Media Encoder instead of After Effects and get different clip duration

Download clip (25fps): http://flexorine.com/Happy_Particles_1.mp4

In Media Encoder, I have a DXV preset, no audio, hard set 30fps. Clip comes out as 4 seconds long.

In After Effects, export to TIFF sequence, then reimport sequence and export in AE as 30fps and I get a clip that's 3.333333 seconds long.

Can anyone explain this when the clip is originally 2 seconds? How can the converted version with a higher frame rate be longer than a slower framerate?

Joris
Posts: 5186
Joined: Fri May 22, 2009 11:38

Re: Frame rate confusion

Post by Joris »

I think you just have a sketchy file.

I tried opening it in a few different apps, and each reports something different.
AE says it's 25 fps, and four seconds long.
QT7 says it's 25 fps and two seconds long.
QTX says it's 37 fps and two seconds long.
Resolume says it's 37 fps and three seconds long.
VLC doesn't give a framerate and says it's two seconds long.

Stepping through it frame by frame, I'd say that AE comes closest to what it actually should be.

Post Reply