last update: 07.04.2020
In order to keep the amount of data that is generated when producing videos for uploading as small as possible, you should compress the videos before uploading them. This means that you reduce the file size without significantly reducing the quality of the video.
This way you can accelerate the upload and minimize the server load of the KIT resources at the same time. How to achieve this is shown in this guide.
Important notes are marked yellow.
Additional information is marked in blue.
We recommend the free software Handbrake for the compression of videos.
Handbrake is an open source software, which is available for all common operating systems: Windows (also as a portable version), macOS and Linux.
You can also select an entire folder containing several video files. Handbrake will then load all videos at once. The next two sections are therefore slightly different.
Video compression is a very CPU-intensive process, and depending on the performance of your computer, the process may take some time and affect the performance of the rest of the system.
We therefore recommend that you set up your workflow so that the compression is running during times when you do not work on the computer yourself.
Congratulations, you’ve successfully compressed your video.
For an example video of an iPhone 11 of 6 minutes length, the file size could be reduced from 533 MB to almost 30 MB with this process, while maintaining almost the same quality!
The process took about 3 minutes on a notebook from 2015.
How to make the recordings available to your students is explained in a separate manual.
These tutorials for the creation of digital teaching material of the center for Technology-Enhanced Learning (ZML) at the Karlsruhe Institute of Technology (KIT) is licensed under a Creative Commons Attribution 4.0 International License.
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