CASUS saves multimedia data in the form in which it is imported. This means that images and videos are not automatically compressed. The reason for this is that only you, the author, can decide whether the substantial information from the multimedia data should be kept or not. The better the data appears on the screen, the more fun it is to study using CASUS. Loading a 100kb image from the database only takes about one second. It is not possible to upload images that are bigger than 2MB or videos that are bigger than 10MB! In order to reach a compromise between the quality of the image and the time it takes to load, we have put together some advice based on our experience. If you have any comments or suggestions, we would be more than happy to include these on this advice page.
Compression compatibility can be determined while you are recording. In general:
More specifically for videos:
Generally speaking, the finished product is never as good as what you see on the screen. Ideally, you should test and optimize the entire productive procedure, from recording to presenting, in CASUS.
Experience has shown us that it may be necessary to renew certain patient or lab images (original findings to histology, technical tests, etc.). You can do so by making new slides, which can then be used by a slide scanner. It is also possible to take digital pictures and to edit these accordingly (re-scale, cut, crop, etc.). We recommend using Adobe Photoshop® to edit digital pictures.
Video sequences can be recorded in any available format, preferably using a digital camera. The size of the video file should be compatible with the capabilities of the server and network. Video playing time should be kept under two minutes, to avoid a decrease in motivation and attention among players.
Apple Quick Time Version 4 or higher is necessary to play videos and audio sequences. You can download Apple Quick Time for free from Apple.
Auscultation sounds, for example, should be made available in digital form (sound storage medium). The same format and compression rules for videos also apply for sound files.
Text can be written outside of CASUS and then copied into the authoring system. You can incorporate the written text into the intended fields in the editor using copy and paste. Problems can occur when using special characters. The most reliable procedure is to type the text directly into the authoring system.