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Lip Sync Rig Not Working

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Dan McClelland
Lip Sync Rig Not Working
on Aug 14, 2018 at 2:47:02 pm

In After Effects CC, I have created a mouth animation rig. Not my first, so I am familiar with the process. It is setup using a mouth comp consisting of the various mouth shapes, each one frame in length. In the animation comp, I use a null layer, moving it horizontally. An expression converts the x axis location to the appropriate frame. Typical mouth rig setup. I believe I learned it here.

On occasion, one of my mouth sounds will not match the corresponding location of my null mouth control. I first noticed this when playing back my character's mouth movements to verify it looks right. I noticed one of the frames, which was supposed to be the mouth for "L" was giving me "EH". The "EH" is the frame just before the "L". I figured I had just not moved my control far enough, but when I attempted to move it, the "EH" remained until it got to "OH", which happens to come right after "L".

I banged my head on the wall for about a day. Never did find a fix, but did notice that when I removed the keyframe right after the "EH" (which was supposed to be "L"), it changed back to "L".

I have other portions of my mouth animation in which the same combination of mouth sounds exist, and the "L" appears just fine. Also, it isn't consistent. In other words, it isn't always an "EH" in place of the desired "L". There seems no rhyme or reason.

Possible culprit? I did originally create the mouth comp as 12 fps, then changed it to 8. I did very little, if anything, using the 12 fps version. I made the change early on. Realizing that the fps settings need to be consistent, I thought I'd mention this in case it triggers a possible reason for this, uh, glitch. My mouth rigs, and my mouth shaped comp had been working well when I worked on AE 6. Went without the software for about a year, then recently subscribed to CC, which is when the problem seems to have started.

AE Compositor/Animator/Creator/Genius Extraordinaire (in my mind anyway)

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