AVI vs RM, difference between AVI and RM format

Comparsion between AVI and RM

File Extension	AVI	RM
File Type	Audio Video Interleave File	Real Media File
Description	AVI, a short for Audio Video Interleave, is a file format that combines audio and video into a single file in a standard container to allow simultaneous playback. It is one of the most commonly used video formats.	Media file used by RealPlayer, an audio and video playback and streaming program; contains audio or video data or a link to a streaming media file, which is played back as it is downloaded; commonly used for Internet radio and Internet videos.
Developed by	Microsoft	RealNetworks
Pros	1) Can be played on diversified media players and devices; 2) Can contain various video & audio codecs;	1) Usually small in file size; 2) Good for streaming video/audio on the Web;
Cons	Not work very well on Mac and iOS devices;	Not supported by most players and devices;
Help You Choose	If you wish to play videos on as many players/devices as possible, AVI is one of the best choice.	If you'd like to share/stream your videos/audios online, then you could use RM format.
Programs that open AVI/RM files	XBMC Apple QuickTime Player Microsoft Windows Video	iOrgsoft RM Converter Real Player Cloud VideoLAN VLC media player