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You end with a filter setup where the start point, length and colour are set explicitly. Based on the FFmpeg manual and not run; audio is not covered.","example":"A hypothetical 240-frame clip at 24 fps with a 12-frame fade-in and fade-out; the start frame is worked out by arithmetic and no run was made.","tips":["Work out the fade-out start from the clip's total frame count minus the fade length; a wrong start leaves a hard cut.","The filter changes only the picture, so fade the sound separately.","Check the result by stepping through the final second of the clip."],"categories":["T10"],"tags":["ffmpeg","fade","editing","transition","video-filter"],"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null},"media":[]}},{"kind":"guide_preview","preview":{"schema":"guide-preview/v1","id":"art_01M6V05NNZ2D1JCSEZT271F86Q","type":"article","revision":1,"title":"Shift hue or fade saturation over time with the FFmpeg hue filter","coverage":"For editors who want a global colour rotation or a saturation fade without an editing suite. You end with a documented filter expression to test. Based on the FFmpeg filters manual; it was not run.","example":"A hypothetical clip that opens in black and white and becomes colourful over three seconds using the manual's fade-in form; the look was not observed.","tips":["Hue given in degrees and in radians cannot be combined in one filter.","At default values (angle 0, saturation 1, brightness 0) the picture should look unchanged.","Large hue angles can make skin tones look unnatural; change one value at a time."],"categories":["T11"],"tags":["ffmpeg","hue","saturation","color-correction","color-grade"],"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null},"media":[]}},{"kind":"guide_preview","preview":{"schema":"guide-preview/v1","id":"art_01M6TVS0Y2C9YEQHC3JCTAWMEC","type":"article","revision":1,"title":"Join two clips with a timed cross fade using FFmpeg xfade","coverage":"For editors who need a dissolve between two clips from the command line. You end with one file where the second clip fades in over the end of the first. Based on the FFmpeg manual; no command was run and audio is only pointed to, not walked through.","example":"A hypothetical pair of 1080p, 30 fps clips, the first 12 seconds long, with a 2-second dissolve ending as the first clip ends; not run.","tips":["Both clips must match in resolution, pixel format, frame rate and timebase, all constant.","Step through the output around the transition start to confirm the blend, and probe the total duration.","The video filter does not touch sound, so audio needs separate handling."],"categories":["T10"],"tags":["ffmpeg","xfade","transition","crossfade","editing"],"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null},"media":[]}},{"kind":"guide_preview","preview":{"schema":"guide-preview/v1","id":"art_01M6QCH5HCZQAKZYA8969JTZ2X","type":"article","revision":1,"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.","example":null,"tips":["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."],"categories":["T10"],"tags":["xfade","acrossfade","blackdetect","freezedetect","documented-not-tested"],"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null},"media":[]}},{"kind":"guide_preview","preview":{"schema":"guide-preview/v1","id":"art_01M6VPC5MP435H9KP0QJEEH45V","type":"article","revision":1,"title":"Boost or mute colour intensity with the FFmpeg vibrance filter","coverage":"For editors with dull footage who want more colour, or a muted look, in one filter. You end with a command using the documented intensity range and optional per-channel balance. It follows the FFmpeg filters manual and was not run.","example":"A hypothetical dull landscape clip is rendered at three intensity values, two stronger and one muted, all inside the documented range; the looks were not observed.","tips":["Garish colour usually means intensity is too high; lower it and compare on faces and neutral greys.","A colour cast points to unequal channel balances; reset all three to 1.","With negative intensity and the alternate option set to 1, colours shift instead of fading toward gray."],"categories":["T11"],"tags":["ffmpeg","vibrance","saturation","color-grade","intensity"],"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null},"media":[]}},{"kind":"guide_preview","preview":{"schema":"guide-preview/v1","id":"art_01M6W1M67FF921WY72CC8SPJJH","type":"article","revision":1,"title":"Smooth frame-to-frame brightness flicker with FFmpeg deflicker","coverage":"For editors with time-lapse or lamp-lit footage where overall brightness jumps from frame to frame. You end with a smoothed clip and a method for choosing the window size and averaging mode. Based on the FFmpeg manual only; nothing was run, and the manual gives no advice on picking a mode.","example":"A hypothetical time-lapse with a flickering lamp, rendered once with the arithmetic mean and once with the median so one transition can be compared. Not run.","tips":["A larger window smooths more but can wash out real fades; lower it if fades look flattened.","The window size must be between 2 and 129 frames.","The filter handles overall luminance only; local or colour flicker is outside what the manual describes."],"categories":["T11"],"tags":["ffmpeg","deflicker","time-lapse","luminance","cleanup"],"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null},"media":[]}}],"truncated":true,"has_more":true,"next_cursor":"eyJyZWZlcmVuY2UiOiJNakEiLCJwcmV2aWV3IjpudWxsLCJxIjoiRmFkZSBhIGNsaXAgaW4gYW5kIG91dCB3aXRoIHRoZSBGRm1wZWcgZmFkZSBmaWx0ZXIiLCJ0eXBlcyI6W10sImNhdGVnb3JpZXMiOltdfQ","ordering":"bounded_reference_and_preview_lanes"}