Filters & Effects
16 articles
Change Video Speed with FFmpeg ? Audio Sync Guide
Speed up or slow down video with FFmpeg using setpts and atempo. Covers 0.25x–10x ratios, audio-sync without drift, pitch-preserving rubberband, variable-speed sections, and smooth slow-mo via minterpolate.
Remove Black Bars with FFmpeg ? cropdetect Guide
Auto-detect black bars with FFmpeg cropdetect, then strip them with the crop filter. Covers letterbox, pillarbox, even-dimension fixes, non-pure-black bars, and the reverse pad workflow.
Blur Faces in Video with FFmpeg ? Mosaic Area Guide
Apply mosaic or blur to a specific region of a video with FFmpeg. Covers crop+overlay sandwich pattern, multi-region, animated tracking, face/license-plate privacy, and quality preservation.
Color Correction with FFmpeg — curves / eq / colorbalance Filters
Correct brightness, contrast, saturation, and color casts in video with FFmpeg's curves, eq, and colorbalance filters. Covers when to pick each filter, exposure tweaks, and white-balance adjustments.
Green-Screen Compositing with the FFmpeg chromakey Filter
Use FFmpeg's chromakey filter to composite green-screen or blue-screen footage. Covers key color, similarity, and blend tuning, compositing over a background video, and spill suppression.
Applying Box Blur with the FFmpeg boxblur Filter
Learn how to apply a uniform box blur to video with FFmpeg's boxblur filter. Covers radius and iteration count, independent control of luma and chroma, and privacy-masking techniques.
Detect Black Frames — Find Scene Boundaries with blackdetect
Use FFmpeg's blackdetect filter to locate runs of black frames in a video. Covers black_min_duration and luminance thresholds, plus applications to commercial breaks and chapter detection.
FFmpeg Frame Rate ? -r vs fps Filter Guide
Change video frame rates with FFmpeg: fps filter vs -r option comparison and when each is correct, checking fps with ffprobe, 60→30→24fps conversion examples, timelapse creation, VFR handling, five error fixes, and five FAQ answers.
FFmpeg Video to GIF ? palettegen Quality Guide
Convert video to high-quality GIF with FFmpeg's two-pass palettegen + paletteuse pipeline. Covers fps/resolution/dithering comparison tables, file size optimization, trimming a clip before GIF conversion, batch processing, and five common error fixes.
FFmpeg Rotate Video ? Fix Phone Orientation
Rotate and flip video with FFmpeg: transpose filter values (0–3), hflip/vflip for mirror effects, fixing iPhone and Android portrait-mode videos that appear sideways, metadata-only rotation vs re-encoding comparison, five error fixes, and five FAQ answers.
FFmpeg Scale Filter ? Resize Without Distortion
Resize video with FFmpeg scale filter: aspect ratio auto-preservation (-1/-2), relative scaling, max resolution capping, and letterboxing with the pad filter.
FFmpeg Scene Detection ? Find Cuts Automatically
Detect scene changes in video using FFmpeg's scdet and select filters. Covers tuning the detection threshold, reading scene-change timestamps, and extracting thumbnails at every cut.
FFmpeg Image Sequence to Video ? Slideshow Guide
Create video slideshows and timelapses with FFmpeg: sequential PNG/JPG to video, single image looping, frame-drop timelapse, and pix_fmt yuv420p compatibility.
FFmpeg Subtitles ? Burn SRT/ASS into Video
Burn subtitles permanently into video with FFmpeg: subtitles filter for SRT/VTT, ass filter for styled ASS/SSA, font and position customization, hard sub vs soft sub comparison, libass installation, and five common error fixes.
Video Stabilization — vidstabdetect and vidstabtransform
Stabilize shaky video with FFmpeg vidstab filters: vidstabdetect + vidstabtransform two-pass pipeline, smoothing strength, crop modes, and libvidstab setup.
FFmpeg Watermark Overlay ? Logo and Text Guide
Add watermarks and logos to video with FFmpeg's overlay filter. Covers position variables, transparent PNG alpha support, opacity control, time-limited display, scrolling animation, multiple logos, and five common error fixes.