Update After Effects and Adobe Media Encoder to the latest version, or make sure that both the applications are of the same version. For example, if you are using After Effects 2019, make sure to use Adobe Media Encoder 2019.
When you add an After Effects composition created with After Effects to Adobe Media Encoder, rendering could get stuck at three seconds. It could also take around eight hours or more to render.
You could try to use the steps listed below to resolve the issue.
Update After Effects and Adobe Media Encoder to the latest version, or make sure that both the applications are of the same version. For example, if you are using After Effects 2019, make sure to use Adobe Media Encoder 2019.
In Adobe Media Encoder, select Media Encoder CC > Preferences > General and turn off Enable Parallel Encoding.
Reset preferences for Adobe Media Encoder. Make sure that Adobe Media Encoder and After Effects are closed in your machine (while following the steps).
macOS
Windows
Clean installation for Adobe Media Encoder. For more details on how to clean installation, see Use the Creative Cloud Cleaner Tool to solve installation problems.
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