"Worksheet","Calculate duration at fractional frame rates without rounding away drift","Evidence status","Your configuration"
"Purpose","Use the actual rational frame rate when converting frames and duration. A rate commonly labeled 23.976 is not exactly 24, and a display label is not always enough to identify variable timing.","Proposed workflow",""
"Check","Question to record","Decision","Your observation"
"Frame count","Number of frames","Discrete quantity",""
"Rate","Frames per second","Keep rational value",""
"Timecode","Labeling convention","Not automatically elapsed time",""
"Example","For 24,000 frames, 24 fps gives 1000 seconds. At 24000/1001 fps, the same frame count gives 1001 seconds. Rounding the second rate to 24 hides a one-second difference in this example. It does not explain every sync problem, but it shows why precise rate records matter.","Illustrative; not a measured product result",""
"Source","https://ffmpeg.org/ffprobe.html https://www.ffmpeg.org/ffmpeg-filters.html","Official references; scope in article",""
"Result","Accepted / unresolved / needs correction","Record date and configuration",""