As shown in the first screen below, CBR assigns a single data rate to the file and encodes in a single pass. Let’s use the interface of the Adobe Media Encoder to define our terms. Use CBR for live encoding on-site and transcoding in the cloud, and 200% CVBR for on-demand video in most geographic regions. This article defines the terms, briefly discusses their history, and provides recommendations for when to use all three. There are three common approaches: constant bitrate encoding (CBR), variable bitrate encoding (VBR), and constrained variable bitrate encoding (CVBR). One of the most common encoding parameters available for live and on-demand streaming is bitrate control, which dictates how the encoder allocates the encoded audio and video data within the file.
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