vcm - Use the Video Conferencing Mode algorithm.Only one control parameter is used - quality factor, specified by " icq_quality" Depending on content, it may or may not decrease objective video quality. This algorithm improves subjective video quality of encoded stream. icq - Use the Intelligent Constant Quality algorithm.To control LA depth the application can use " la_depth" parameter. Two other parameters, " max_bitrate" and " init_bufsize", are ignored. The only available rate control parameter in this mode is " bitrate". It works by performing extensive analysis of several dozen frames before the actual encoding and as a side effect significantly increases encoding delay and memory consumption. It is a special bitrate control mode in the encoder that has been designed to improve encoding quality. la - Use the VBR algorithm with look ahead."bitrate", "accuracy", "convergence" must be set. This method does not follow HRD and the instant bitrate is not capped or padded. The algorithm focuses on overall encoding quality while meeting the " bitrate" specified bitrate, within the " accuracy" accuracy range, after a " convergence" period. ![]()
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