1. A method for converting a two dimensional (2D) video feed into a stereoscopic video stream, comprising: identifying, by a conversion engine from a 2D video feed received from one 2D video camera, a current 2D video frame; computing homographies for a plurality of pixels of the current 2D video frame and generating a homography matrix to map the current 2D video frame into a panoramic background image constructed based on previous 2D video frames; generating, from the panoramic background image, a panoramic background depth map; extracting a current frame depth map that corresponds to the current 2D video frame by computing an inverse projection from the panoramic background depth map using the homographies for previous 2D video frames; generating an updated current frame depth map comprising at least one billboard representing dynamic content associated with the current 2D video frame, wherein the depth of the billboard is derived from its location within the panoramic background depth map; and rendering, by the conversion engine, a stereoscopic image pair based on the current 2D video frame, the updated current frame depth map, and camera information associated with the 2D video camera.