Video decoding method

The invention provides a video decoding method. The method comprises the steps of applying for a predetermined number of frame buffers at a video acquisition stage, directly mapping the obtained frame buffers into a user space, performing format conversion on the acquired image data and coding the data, splitting video data and framing the video data for transmission, and running a receiving thread, a data processing thread and a decoding thread simultaneously in a pipeline system upon receiving one frame of data, decoding the data, performing format conversion on the decoded data and then displaying the data. The video decoding method has the advantages that the instantaneity of video data reading is optimized and the fluency of video is guaranteed. The acquisition, compressing, digital transmission and decoding of high-speed videos are completed by use of a simple structure and a technique easy to implement at low cost.