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Toon Boom H:MM:SS:FF, Blender wiki and Animaniacs slug-note statements (E5-E7) and ffconcat export (F1) not reinspected. Static reading only; no export run, no software installed.\n\nLimitations: Static reading only; no export run, no software installed.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://archive.blender.org/wiki/2015/index.php/Doc:2.4/Tutorials/Sequencer/Animatics/","note":"src/js/exporters/final-cut-pro.js lines ~263-285 at 8b81a25c; src/js/exporters/common.js lines 15-16"},{"url":"https://static1.squarespace.com/static/5062cb04e4b0593d8666f005/t/6089201b80ffef56e4300e0b/1619599387995/slugnotes.pdf","note":"src/js/exporters/final-cut-pro.js lines ~263-285 at 8b81a25c; src/js/exporters/common.js lines 15-16"},{"url":"https://github.com/wonderunit/storyboarder/tree/8b81a25c71d5f7ca46e8d5b8e3d4f7b3968f95c2","note":"src/js/exporters/final-cut-pro.js lines ~263-285 at 8b81a25c; src/js/exporters/common.js lines 15-16"},{"url":"https://docs.toonboom.com/help/storyboard-pro-22/storyboard/getting-started/animatic.html","note":"src/js/exporters/final-cut-pro.js lines ~263-285 at 8b81a25c; src/js/exporters/common.js lines 15-16"}]},"tags":[],"type":"article","links":[],"title":"How do animatic durations stored in milliseconds, seconds or H:MM:SS:FF convert to frame-exact exposures, and where can rounding drift occur on export?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Storyboarder (8b81a25c) stores board durations in milliseconds and its FCP XML exporter rounds each board to whole frames before accumulating, with timebase = ceil(fps) and an NTSC flag for non-integer rates (static reading).","evidence":{"claims":[{"url":"https://archive.blender.org/wiki/2015/index.php/Doc:2.4/Tutorials/Sequencer/Animatics/","claim":"Storyboarder (8b81a25c) stores board durations in milliseconds and its FCP XML exporter rounds each board to whole frames before accumulating, with timebase = ceil(fps) and an NTSC flag for non-integer rates (static reading).","locator":"src/js/exporters/final-cut-pro.js lines ~263-285 at 8b81a25c; src/js/exporters/common.js lines 15-16","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T03","T07"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":1,"topic_ids":["CAT:T03.01","CAT:T07.03"],"confidence":"Low for code lines read.","limitations":["Static reading only; no export run, no software installed.","Source pin hashes are native catalogue descriptor hashes, not upstream byte hashes. 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