After Effects CC 2014 (13.0) does not include exporters for creating H.264, MPEG-2, and WMV videos directly from the render queue. To create videos in these formats, you should use Adobe Media Encoder.
You can still import videos in these formats into After Effects.
Send the composition directly to Adobe Media Encoder from After Effects (Composition > Add To Adobe Media Encoder Queue)
Hereâ€™s some more detail about this option, including pros and cons:
To create videos in these formats using Adobe Media Encoder with After Effects is to directly add the composition from After Effects to the Adobe Media Encoder queue. This method has the advantage of allowing you to continue working in After Effects while the rendering and encoding takes place, since the rendering is performed by a background instance of After Effects. The rendering phase may be slower in some cases, compared with using the After Effects render queue, because the headless version of After Effects rendering in the background does not have access to GPU acceleration and multiprocessing features.
One thing that makes Adobe Media Encoder so much better than After Effects for creation of files in final delivery formats is its Preset Browser and easy-to-use system for creating, saving, sharing, and applying encoding presets. Another is the assortment of features in the Effects tab with which you can automatically add watermarks, timecode overlays, et cetera.