Autodesk 64006-051108-9001 User Guide - Page 158

150 Chapter 8: Encoding Estimate the Maximum File Size You can get a quick estimate of the maximum file size that you can create for your video with the highest bitrate as follows: maximumfilesize = 0.494 × videolength where, maximumfilesize is the maximum file size in MB videolength is the duration of the video in seconds This will give you a good approximate value to work with. If you want a more detailed value, or if you want to work with different bitrates or file sizes then use the calculations that follow. Video Length Use this formula to calculate the length of your video in seconds: videolength = (hh × 3600) + (mm × 60) + ss where, videolength hh, mm, and ss is the duration of the video in seconds represent the hours, minutes, and seconds of the video length Desired Bitrate Use this formula to calculate the desired total bitrate: desiredbitrate = f---i--l--e---s--i--z---e----×-----8---3---8---9videolength where, desiredbitrate filesize videolength is the desired total bitrate in kilobits per second (kbps) is the file size in MB is the duration of the video in seconds Total Bitrate Use this formula to calculate the total bitrate required to encode your video: totalbitrate = videobitrate + audiobitrate where, totalbitrate videobitrate audiobitrate is the combined bitrate in kilobits per second (kbps) for both audio and video is the average kbps used to encode the video (Bitrate value in the Output group) is the average kbps used to encode the audio (Audio value in the Output group)