A Survey on Different Video Restoration Techniques

The recovery of a damaged or altered video file plays a vital role in searching for evidences to resolve a criminal case in digital forensics. Here, a frame-based recovery method for a corrupted video file has been proposed using the specifications of a codec that is used to encode the video data. The existing approaches try to recover a video file with the help of the file structure rather than frame structure. But the problem is that in the case where a target video file is severely fragmented or has a portion of video overwritten by other video content, video file recovery of existing approaches may fail. The proposed approach addresses how to extract video frames from a portion of the video to be restored as well as how to connect extracted video frames together according to the codec specifications. This paper proposes a technique to restore the video data on a frame basis from its corrupted versions where the video data has been significantly fragmented or partly overwritten in the storage media. The proposed method identifies, collects, and connects isolated video frames using the video codec specifications for non-overwritten portions of the video data to restore a corrupted video file.