Original learning worksheet — How to calculate a vertical crop from a wide video
Created by thecreatingco, October 10, 2026.
Example values and planning notes; not an app export, importable project, scan or measured benchmark.
You may reuse and modify this original worksheet, including commercially. No external-image rights are granted.

Source | 1920 × 1080 | 16:9 landscape | Observed: __________ | Next decision: __________
Target ratio | 9:16 | Width = 1080 × 9 / 16 | Observed: __________ | Next decision: __________
Crop width | About 608 px | About 31.7 percent of source width | Observed: __________ | Next decision: __________
Centered crop | About x=656 to x=1264 | Subjects outside this band are lost | Observed: __________ | Next decision: __________

Review steps:
1. Open Reframe and choose the intended output shape. Begin with a centre crop and identify the subject at the first frame.
2. Watch the full clip, noting where the subject reaches the edges. Adjust the crop around action rather than around one attractive still.
3. Review a small exported result if available. Confirm the output dimensions and inspect caption placement at the actual phone display size.

Decision note: These dimensions are calculated from an example source, not Reframe output. Automatic framing is not a guarantee, and pixel rounding may differ by encoder. Judge the full motion and the final export.

My source/file: __________
Current browser/app version: __________
Checked on: __________
Saved copy location: __________
Output check and remaining uncertainty: __________