Eko Studio supports a variety of files:
Video Extensions - avi, mov, flv, mp4, wmv, 3gp, mpeg2, rm, divx, 3g2, dv,f4v, mpg, mpe, mpeg, m1v, m2v, m4v, m2ts, webm
Although all the above formats are supported, we recommend using uncompressed .avi or .mov files to ensure your transitions will be seamless. If you choose to compress the video track we suggest uploading QT (.mov) files with H264 or ProRes video tracks and uncompressed audio tracks (keeping the audio track of your video file uncompressed is especially important to create the seamless transitions between the tree nodes).
When editing clips outside of Eko Studio, make sure that files are sized 1280*720 when you render, or at least in a 16:9 ratio, to ensure faster uploading.
Audio Extensions - wav, mp3
Image Extensions - png, jpg, jpeg, gif
Eko Studio Custom Extensions – ipre (Presets), iskn (Button Editor skins)