What formats / encodings are supported for videos?

Currently we only support avi or mp4 with mpeg4 video codec and mp3 audio codec. We recommend the following settings:

• Video dimensions: 320x240
• Video bitrate: 600kps
• Audio frequency: 22000Hz
• Audio bitrate: 96kbps
• Video codec: mpeg4
• Audio codec: mp3

Example ffmpeg command:
ffmpeg -i sourcevideo.avi -vcodec mpeg4 -acodec libmp3lame -b 600k -ab 96k -maxrate 1M -bufsize 1M -s 320x240 -ar 22050 -vol 1024 destvideo.avi
Download ffmpeg from: http://ffmpeg.zeranoe.com/builds/