It is impossible to give a compression setting that satisfies all users, as factors such as computer performance, desired output dimensions and the desired level of compression artefacts are different for each user. Finding an optimal compression setting for your videos may initially involve some experimentation using different formats and compressions presets to determine the optimal settings for your computer.
A few key areas of compression will help with the performance of MixEmergency. Video should be compressed with keyframes every 12 to 25 frames. Longer distances between keyframes will result in a lot of unnecessary decoding, and can degrade the performance of MixEmergency.
The dimensions of the compressed image will depend on the performance of your computer and the output device that you intend on displaying to. For most situations 640 x 480 (or 640 x 360 for wide-screen) will be sufficient. If you experience poor performance, you may need to recompress your video at decreased dimensions.
It is recommended that you compress your video as h.264 video in a mov or mp4 container.