Abstract: A video synopsis method for overlapping videos generated in different periods is applied to a video synopsis device. The video synopsis method includes dividing a monitoring film into a plurality of videos, acquiring a pixel difference between frames respectively from the plurality of videos at identical time sequence, acquiring a weighting parameter according to the pixel difference, and utilizing the weighting parameter to overlap the frames respectively from the plurality of videos so as to generate a composite frame.

Abstract: A video synopsis method for overlapping videos generated in different periods is applied to a video synopsis device. The video synopsis method includes dividing a monitoring film into a plurality of videos, acquiring a pixel difference between frames respectively from the plurality of videos at identical time sequence, acquiring a weighting parameter according to the pixel difference, and utilizing the weighting parameter to overlap the frames respectively from the plurality of videos so as to generate a composite frame.

Abstract: 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.

Abstract: 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.

Abstract: An audio-video processing method is adapted to an audio-video device and a storage device for processing an index-based audio-video file. The method for processing audio-video data includes a write procedure, a play procedure, and/or a repair procedure. In the write procedure, audio-video data is captured by the audio-video device first, and the audio-video data includes a plurality of continuous samples; a header is written according to the audio-video data; a predetermined number of samples are captured as a data chunk; a prefix index corresponding to the data chunk and the data chunk are written in sequence repeatedly according to the audio-video data; and a file index is written finally. In the play procedure, after the header is read, corresponding prefix index and data chunk are repeatedly read and played. Moreover, in the repair procedure, incompletely written file index and data chunk are repaired through all the prefix indexes.

Abstract: An audio-video processing method is adapted to an audio-video device and a storage device for processing an index-based audio-video file. The method for processing audio-video data includes a write procedure, a play procedure, and/or a repair procedure. In the write procedure, audio-video data is captured by the audio-video device first, and the audio-video data includes a plurality of continuous samples; a header is written according to the audio-video data; a predetermined number of samples are captured as a data chunk; a prefix index corresponding to the data chunk and the data chunk are written in sequence repeatedly according to the audio-video data; and a file index is written finally. In the play procedure, after the header is read, corresponding prefix index and data chunk are repeatedly read and played. Moreover, in the repair procedure, incompletely written file index and data chunk are repaired through all the prefix indexes.