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Remotion captions inside a Sequence: global frames versus the local frame clock
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What this guide covers
For editors and developers placing captions that are already in composition frames inside a Remotion Sequence. It explains converting those frames to the Sequence's local clock without retiming twice, with a small Python helper. The evidence is a founder-run render and unit checks on synthetic fixtures, not an independent test.
More about this guide
Guide ID: art_01M6NE6TAVHNW1KKGRY758N7P9
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Guide title
Remotion captions inside a Sequence: global frames versus the local frame clock
Coverage
For editors and developers placing captions that are already in composition frames inside a Remotion Sequence. It explains converting those frames to the Sequence's local clock without retiming twice, with a small Python helper. The evidence is a founder-run render and unit checks on synthetic fixtures, not an independent test.
Example
A 96-frame, 24 fps test composition with a Sequence from frame 24 for 48 frames, rendered in Remotion 4.0.537; word timings were converted and boundary stills matched, with the last word clipped at the window end.
Useful starting points
- A word interval that ends where the Sequence window ends is clipped, so keep the original global intervals and recompute the local ones whenever the edit changes.
- For nested Sequences, pass the absolute start including every parent offset, and shorten the duration if a parent window cuts the child.
- A word reduced to a single visible frame may not be legible, so track whether each word is full, clipped or dropped.
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