ABPlayer is a video player developed with the Flex 3/4 SDK. It allows users to post comments onto the playing timeline while playing online video. Comments are scrolled across the screen when the video reaches the timeline position of the comment, allowing interactive and realtime commenting on the video. It also features bottom, top, positioned, and reverse scroll options which allow users to create closed captioning and subtitles for videos. Comments support color, font, size, transitions, movements, 3D transforms, and opacity.