"Worksheet","Why a VBR export can miss your expected file size","Evidence status","Your configuration"
"Purpose","A target rate is an encoding instruction rather than a guaranteed final byte count. Inspect the exported average, audio and duration before changing codec or rate settings.","Proposed workflow",""
"Check","Question to record","Decision","Your observation"
"Target","Desired average behavior","Not a final byte guarantee",""
"Maximum","Peak-rate control where supported","Not the average size input",""
"Constant quality","Quality-oriented control","Size depends on content",""
"Example","An illustrative 60-second file at an actual total average 10 Mbps is about 75 MB before small container differences. A file twice as long is about twice that size at the same actual average rate. If your output is unexpectedly large, confirm duration and audio streams before assuming the video codec failed.","Illustrative; not a measured product result",""
"Source","https://helpx.adobe.com/uk/premiere/desktop/render-and-export/export-files/overview-of-export-settings.html https://ffmpeg.org/ffprobe.html","Official references; scope in article",""
"Result","Accepted / unresolved / needs correction","Record date and configuration",""