Video encoding method and video encoder

Abstract

The embodiment of the invention provides a video encoding method and a video encoder. The method comprises the following steps: obtaining a current quantizing parameter value; determining whether an output code rate corresponding to the current quantizing parameter value satisfies the requirements of a preset threshold; if not, adjusting the current quantizing parameter value into a target quantizing parameter value; encoding a video frame by using the target quantized parameter value, so that the encoded video satisfies the requirements of the preset threshold, the picture quality can be retained during the transcoding of any input video, and the code rate is saved.

Description

technical field [0001] The present application relates to the technical field of video processing, in particular to a video encoding method and a video encoder. Background technique [0002] Video transcoding is the basis of all Internet video services. Video transcoding refers to converting a compressed and encoded video stream into another video stream to adapt to different network bandwidths, different terminal processing capabilities, and different user needs. Video transcoding is essentially a process of first decoding and then encoding. [0003] The goal of video transcoding is to require the video data obtained after transcoding to be played smoothly and with clear picture quality. However, fluency requires a lower bit rate, and on the contrary, a clearer picture quality requires a higher bit rate. [0004] In order to meet the requirement of bit rate control, currently online videos generally adopt the encoding method of controlling the average bit rate to transcod...

AI Technical Summary

Problems solved by technology

However, in the case of a given average bit rate, the above method loses its adaptability to video content, that is, no matter whether the video scene is simple or complex, it is encoded according to the same bit rate, so that when encoding simple scene video Waste unnecessary bit rate and bandwidth, and cause serious loss of video quality when encoding complex scenes

At the same time, the above method reduces the fluctuation of the code rate, and correspondingly increases the fluctuation of the image quality after transcoding, which seriously affects the user experience of the player.

Images