Field Motion and Mix & Match

Ever wonder how different settings might affect Mix & Match? What do the resulting frames look like? The following is an example of worse case scenario of a 29.97p source that is brought into a 23.976p project type. Progressive to progressive is a challenging frame rate and format to deal with in Mix & Match. The idea is that you may want to play with the values in the “Field Motion” column one added to your bin view.


In this pop-up menu, changing progressive to interlace, interlace to progressive will result in a different Mix & Match algorithm being used for the real time frame rate adjustment when playing. Depending on footage type, and target display, one may be better than the other. If dealing with footage that already has a 2:3 cadence in it, then set it to that.This blog entry will show 29.97p to 23.976p. Each graphic displays the one second’s worth of frames for the original format.

Here are the original 30 frames from the 29.97p project (click for original size):


This next graphic is that clip opened and transcoded in a 23.976 frame for the same 1 second duration (now 24 frames). This example shows the result of the Field Motion value set to “progressive”. Every 3 out of 4 frames are blended. This would most likely be a better choice for interlace display viewing (click for original size):


The following example is the same clip but with the Field Motion set to interlace. Here, 1 out of 4 frames is a blended frame. This would be better choice for progressive display viewing (click for original size):

interlace.png So play around with both the Field Motion Settings as well as the different type of motion effects in the motion effect editor to get the best looking frame rate conversion based on your primary delivery format. In the future, I will look at other frame rate Mix & Match results “under the microscope” to see what is happening to the frames.

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