Video transcoding method, computer device, and storage medium

A computer device, comprising:

• processing circuitry configured to:
• obtain at least one initial quantization parameter used to encode at least one initial coding unit for generating an initial compressed video;
• determine, according to the at least one initial quantization parameter, a current reference quantization parameter corresponding to a current coding unit in a current video frame that is generated by decoding the initial compressed video;
• determine an estimated quantization parameter for encoding the current coding unit;
• determine a first difference between the current reference quantization parameter and the estimated quantization parameter;
• determine whether the first difference is greater than a threshold;
• in response to the first difference being determined as not greater than the threshold,
• set a target quantization parameter to be the estimated quantization parameter;
• in response to the first difference being determined as greater than the threshold,
• calculate a quantization parameter increment that is proportional to the first difference, and
• set the target quantization parameter to be a summation of the estimated quantization parameter and the quantization parameter increment;
• and
• encode the current coding unit according to the target quantization parameter.

A non-transitory computer-readable storage medium storing computer-readable instructions, which when executed by one or more processors, cause the one or more processors to perform:

• obtaining at least one initial quantization parameter used to encode at least one initial coding unit for generating an initial compressed video;
• determining, according to the at least one initial quantization parameter, a current reference quantization parameter corresponding to a current coding unit in a current video frame that is generated by decoding the initial compressed video;
• determining an estimated quantization parameter for encoding the current coding unit;
• determining a first difference between the current reference quantization parameter and the estimated quantization parameter
• determining whether the first difference is greater than a threshold;
• in response to the first difference being determined as not greater than the threshold,
• setting a target quantization parameter to be the estimated quantization parameter;
• in response to the first difference being determined as greater than the threshold,
• calculating a quantization parameter increment that is proportional to the first difference, and
• setting the target quantization parameter to be a summation of the estimated quantization parameter and the quantization parameter increment;
• and
• encoding the current coding unit according to the target quantization parameter.