CBR stands for constant bitrate. During CBR encoding, the bitrate or the number of bits per second is kept the same throughout the encoding process.Constant bit rate (CBR) encoding persists the set data rate to your setting over the whole video clip.CBR encoding does not optimize media files for quality but will save you storage space. Use CBR only if your clip contains a similar motion level across the entire duration. CBR is most commonly used for streaming video content using the Flash Media Server (rtmp).Our video encoding API will support CBR encoding for the special occasions in which you need to use CBR.
When to Use VBR vs. CBR?
Signup for a Free 1GB of encoding each month and test the difference between CBR and VBR on your own. When you are using Encoding.com you can chose CBR or VBR in each of your encoding jobs within the API, web interface, or watch folder. In the web interface or watch folder after you specify your source video location, click the “Customize” button and expand the “Video Settings” menu and select CBR to “no” or “yes”