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Rotate a clip by 90 degrees or mirror it with FFmpeg transpose, hflip and vflip
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What this guide covers
For editors fixing sideways or mirrored footage. You end with a clip turned a quarter turn or flipped, with a way to leave already-upright clips alone. Based on the FFmpeg manual and not run; how players treat rotation metadata is not covered.
More about this guide
Guide ID: art_01M6V3XCXMFEHZP0GABT66V2QW
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Guide title
Rotate a clip by 90 degrees or mirror it with FFmpeg transpose, hflip and vflip
Coverage
For editors fixing sideways or mirrored footage. You end with a clip turned a quarter turn or flipped, with a way to leave already-upright clips alone. Based on the FFmpeg manual and not run; how players treat rotation metadata is not covered.
Example
A hypothetical 1920 by 1080 clip rotated clockwise should become 1080 by 1920; the new size is arithmetic from swapping width and height, and no run was made.
Useful starting points
- If text reads mirrored after rotating, a flip variant of the direction was used; use the plain clockwise or counterclockwise setting.
- A clip already in portrait can end up sideways unless the passthrough option is set.
- If a player still shows the clip sideways, probe the stream for leftover rotation metadata.
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