Not all devices support all formats of video. It is important to identify the proper format to use for the devices you are supporting. Some formats are MPEG-4, WMV, 3GPP and 3GPP2, SWF, and FLV. Software converters are available to create existing video in a different format. Some mobile platforms also do conversions on the fly according to the needs of the device. Video support is included in the new HTML5 specifications, which reduce the compatibility issues.