Clocking in at a resolution of 1920x1080 pixels, the standard full HD format 1080p is the highest-quality mainstream video format. Though larger formats are available, most widescreen televisions and monitors are built to a maximum of 1080p. Video files saved in the popular MP4 format will often come with enormous and unwieldy file sizes at that ratio; as a result, you may need to convert to something smaller if you intend to distribute the file across the Internet. A common compromise between file size and quality is 480p, which usually features a pixel resolution of 854x480 for files in a widescreen aspect ratio.
Download and install Super, the free all-purpose media converter from its website.
Click and drag your MP4 file into the file window at the bottom of the application.
Choose "MP4" for the Output Container and "H.264/AVC" for the Output Video Codec.
Click the "More" button next to "Video Scale Size" twice to input a custom video ratio.
Enter "854" into Width and "480" into Height for the first set of custom ratios. Leave every other option default if you are not sure what to enter.
Click the "Encode (Active Files)" to start the conversion process. You can add multiple files and convert them all at once if you wish. Super will play a loud dinging sound to let you know when it is complete.
VLC Media Player
Open VLC Media Player, which you can download for free from its website.
Click the "Media" menu and select "Convert/Save."
Press the "Add" button and find your MP4 file.
Click "Convert/Save" and enter the destination file by clicking "Browse." Make sure you enter a new file name with the ".mp4" extension.
Select "Video - H.264 + AAC (TS)" from the list of codecs.
Click "Edit Selected Profile" to add custom settings to your file.
Navigate to the "Video Codec" tab and enter "480" in the Height field. VLC will figure out the width automatically based on your file's aspect ratio.
Click "Save" and "Start" to begin converting your MP4 to a smaller file.
Get WinFF from its website.
Click the "Add" button and find your MP4 file.
Choose "MP4" from the Convert To list.
Navigate to the "Video Settings" in the Additional Options window and enter "854" x "480" into the Video Size window.
Click "Convert" to create your new MP4 file.