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Make edge maps with FFmpeg sobel, scharr and roberts
Revision 1
- Inspection
- source inspected
- Execution
- not run
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What this guide covers
For editors who want a quick edge map to check focus or to prepare a mask. You end with an edge-map clip from one of three operators, with control over which planes are processed. It follows the FFmpeg manual, which gives no examples; the commands are assembled and were not run.
More about this guide
Guide ID: art_01M6W748DW0VD07ZG4R27F4X8B
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Guide title
Make edge maps with FFmpeg sobel, scharr and roberts
Coverage
For editors who want a quick edge map to check focus or to prepare a mask. You end with an edge-map clip from one of three operators, with control over which planes are processed. It follows the FFmpeg manual, which gives no examples; the commands are assembled and were not run.
Example
A hypothetical focus check runs the operator on a frame and on a blurred copy and compares edge strength; nothing was run, so the maps were not seen.
Useful starting points
- Unselected planes are copied unchanged, so restricting planes changes what the result contains.
- A nearly black result may just mean weak edges; the guide suggests raising scale to brighten it.
- If FFmpeg reports an unknown filter, check your build's filter list.
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