Variable Frame Rate MP4
From SDA Knowledge Base
Page under construction.
Introduction
This is an advanced guide meant for those who want that extra quality in their videos. Creating VFR video takes a lot more work than CFR. You should be comfortable with AviSynth, MeGUI and batch files or working through the command line.
What is variable frame rate? You can probably guess that a constant frame rate is where the frame rate of a video stays the same throughout its whole length. In VFR you'll have sections that have a different framerate. VFR is useful when the game you've recorded has multiple in-game framerates. God of War for the PS2 outputs gameplay at full framerate while its cinematics are half framerate. MvBob is best suited for F1 while Telecide is best suited for F2.
This guide uses the concatenation method meaning that you will have to split your video on each change in framerate. So if the framerate changes six times, you're going to create seven different videos. Now you might understand why I said this is a lot of work, you're going to have to do some serious AviSynth scripting! The drawback of the concatenation method is that the bitrate distribution when doing multi-pass will be affected negatively.
Setup
