METHOD FOR REVERSE VIDEO PLAYBACK AND COMPUTER-READABLE MEDIUM

摘要

A method for reverse video playback and a computer-readable medium are provided for playing a video stream backward. The video stream includes a plurality of groups of pictures which includes a plurality of frames. The frames include one I-frame and at least one frame which is a non-I-frame. The said method includes decoding from the I-frame to a last one frame in a group of pictures according to the time sequence, outputting the last one frame, saving at least one frame which is not outputted in the group of pictures to a storage module, pre-decoding the frames which is not outputted and saved in the group of picture, outputting the frame which is in the storage module.

主权项

1. A method for reverse video playback for playing a video stream backward, the video stream comprising a group of pictures, the group of pictures having a plurality of frames, the plurality of frames comprising an I-frame and at least one non-I-frame, the plurality of frames having a time sequence, the method for reverse video playback comprising:
(a) decoding the frames from the I-frame to the last frame in the group of pictures according to the time sequence; (b) outputting the last decoded frame; (c) saving the last at least one decoded frame which is not outputted in the group of pictures to a storage module; (d) pre-decoding the frame which is neither outputted nor saved in the group of pictures; (e) outputting the decoded frame in the storage module; and (f) when no decoded frame is in the storage module, outputting the last decoded frame which is neither outputted nor saved in the group of pictures which is pre-decoded and saving the last at least one decoded frame among the left frames to the storage module.