Issue when importing videos

When the imported video is selected, check the Info to the right of the Thumbnail in the Project Panel. It will display the frame rate, audio settings, length, and codec. I've never heard of After Effects fouling up the interpreted frame rate on a video with a standard frame rate. It can foul up on video shot at very high framerates or timelapse (hyperlapse) videos, but those videos do not have audio tracks. 

If the interpreted frame rate is wrong, changing it to the correct frame rate using File/Interpret footage will solve the playback speed problem. Variable framerate footage can give you problems. This type of footage typically comes from mobile devices and screen capture programs. The frame rate will get close to standard. Something like 29.031. If you suspect the footage is variable frame rate, you can often fix the problem by simply using the File/Interpret Footage menu and setting the frame rate to the nearest standard frame rate. That would be 29.97 or 30 fps in my example.

If setting variable frame rate footage to the nearest standard frame rat does not solve playback or rendering problems, you must transcode the footage to a standard frame-based production format like ProRez. The Media Encoder can do that. Do not transcode MP4 footage to another MP4. The quality loss is too high, and MP4 is not a suitable production format.

You must render a Ram preview to get real-time playback in After Effects. The video will not play back at the correct speed until the render is complete. You would need a $$$$$$ monster system to get a 15-minute ram preview. Five to ten seconds would be more normal.

AE is not an NLE, and it does not act like one.

Hi Harry25600722tr1v,

Sorry for your issue.

Does it happen with all the files? What's the frame rate of your footage? Does it play in slow motion in After Effects? Also, what are your system specifications?

Let us know, we're here to help.

Thanks,

Nishu