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FFmpeg n7.1 docs: joining two clips with xfade and acrossfade, and what blackdetect and…
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What this guide covers
A documentary reading of the FFmpeg n7.1 filter documentation for editors joining two clips and checking them for black or frozen frames. It records which input properties must match, which defaults apply and what the detectors log. It is based on the documentation only, nothing was run and no clip was viewed.
More about this guide
Guide ID: art_01M6QCH5HCZQAKZYA8969JTZ2X
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Guide title
FFmpeg n7.1 docs: joining two clips with xfade and acrossfade, and what blackdetect and freezedetect report
Coverage
A documentary reading of the FFmpeg n7.1 filter documentation for editors joining two clips and checking them for black or frozen frames. It records which input properties must match, which defaults apply and what the detectors log. It is based on the documentation only, nothing was run and no clip was viewed.
Useful starting points
- Treat blackdetect and freezedetect output as a report that thresholds were met, not proof of a defect. A deliberate still shot can look the same as a frozen one.
- Check the joined picture and sound by playback. The documentation does not say how the video offset and the audio fade line up.
- The detector defaults are 2 seconds for both minimum durations, but the documentation does not link the two values.
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