File Size got increased after exporting AEP file to mp4 using Media Encoder.

[sureshbala84]

While i export aep file to mp4, through media encoder, file size was increased nearly like 1 GB, as aep file is just 500 KB only, what's wrong in this, even i haven't load any big media files in it.

[Rick Gerard]

The file size of a rendered movie depends entirely on the frame rate, frame size, and compression settings. If you do not have an experts understanding of video standards, compression, and formats you should only be using the presets in the AME. 20 seconds of video using the YouTube HD preset at 30 fps is going to be the same size within a few KB no matter what is going on in the project. The file size of the After Effects Project has nothing at all to do with the file size of the rendered footage or the file size of the original source footage. File size of one of my recent projects: 39 MB

The file size of just one of the renders: 1.69 GB

If you are comparing the file size of the original footage and the rendered file then you are at least comparing apples to apples. If the source footage is from a mobile device or a screen capture it can have a variable frame rate and have much higher compression which would make it much smaller than a rendered copy of the same file at a constant frame rate.