How to Compress a Video File

A guide to demonstrate how to compress a video file using Prism

Video files are big and they can take up huge space on your computer or device. Prism can easily create smaller files for email, uploading, or storage.

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  1. Click Add File button on the Home tab toolbar to add a video. You may also click ALT+A on your keyboard or drag and drop a file or folder into the File bin. Click Add File button to add a video.

  2. Click File Options and click the down arrow beside Video Compressor under MP4 Encoding Settings. Select between H264 and H265 depending on your file size requirement. Click OK to save your selection.

    H264 standard will compress your video file to up 50% size of MPEG-2. Through this compression, you will be able to maintain the same video quality despite using only half of the storage space. Bit rates savings of 50% or more compared to MPEG-2

    H265 is the successor to the widely used H.264. H.265 offers from 25% to 50% better data compression at the same level of video quality.

    Note: The Output Format used in this tutorial is the same as the format of the original file. Click Video Compressor under MP4 Encoding Settings

  3. Another way to reduce your Video File size is by reducing Video Quality/Bitrate. Click File Options and click the down arrow beside Video Quality/Bitrate under MP4 Encoding Settings.

    Change the video Bitrates to a lower kbps value. The bitrate affects the file size of your video output as well as its quality. The lower the bitrate, the smaller the file size but the output quality will also be lowered. You can also select your desired Video Quality and Filesize. Click OK to save your changes. Reduce Video Quality or Bitrate

  4. Resize Video Dimensions can also reduce the video file size. Click Video Output Options tab under File Options and check the Resize Video checkbox. Enter a smaller width and height to achieve a smaller file size. Check the Constrain Proportions checkbox to avoid distortion. Click OK to save your selection. Resize video dimensions under File Options.

  5. Reduce Frame Rate to reduce video file size. Check Limit Frame Rate under Video Output Options. Use the up and down arrow to adjust the frames per second. The lower the Frame Rate, the smaller the File Size. Lowering the frame rate of your video to 15 or 10 fps can reduce the file size by as much as 200% or 300%. You may want to experiment to find the lowest acceptable frame rate of your video file. Click OK to save your changes. Reduce frame rate under File Options.

  6. Once you are finished, click the Convert button and save your file to your desired folder. Click Convert and Save File.

    Pro Tip: Convert the video to .flv or .mp4, they both have small file sizes. Review Other Links section as each format has it’s own Encoder Options.

    Help Manual Link:

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