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Find the cuts in a video with ffmpeg on Windows: list every shot with its time, drop flashes,…
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What this guide covers
For people with a finished video who want to know where its shots start and end. You get a Windows PowerShell script that counts the cuts ffmpeg finds at several scene thresholds, writes a CSV of shots with times, drops a flash that would count as two cuts, saves one picture per shot and tiles them into numbered contact sheets, then reports a pass or check verdict. It ran only on a generated 20-second clip with known cuts, so real footage, camera motion and long files are untested.
More about this guide
Guide ID: art_01M77Z9P1T8FKXGFWR1XPT3W53
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Guide title
Find the cuts in a video with ffmpeg on Windows: list every shot with its time, drop flashes, and build a numbered contact sheet to check by eye
Coverage
For people with a finished video who want to know where its shots start and end. You get a Windows PowerShell script that counts the cuts ffmpeg finds at several scene thresholds, writes a CSV of shots with times, drops a flash that would count as two cuts, saves one picture per shot and tiles them into numbered contact sheets, then reports a pass or check verdict. It ran only on a generated 20-second clip with known cuts, so real footage, camera motion and long files are untested.
Example
On a generated clip with four hard cuts, a grey-to-grey cut, a two-frame flash and a dissolve, the default threshold found the four hard cuts and dropped the flash; it missed the grey-to-grey cut until the threshold was lowered to 0.05, and it never found the dissolve.
Useful starting points
- Read the threshold ladder first: a good threshold sits where the count stops changing.
- A pass means the count is steady and the files exist, not that every cut was found; open the contact sheet and compare it with the film.
- A dissolve does not show up as a cut, so a shot that mixes two scenes on the sheet may hide one.
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