FFmpeg Cookbook
Vertical Video (9:16) for Instagram & TikTok: Crop and Pad
Convert horizontal video to vertical 9:16 with FFmpeg for Shorts, Reels, and TikTok. Learn center crop, blurred-background padding, position-specific crop, and aspect-ratio conversion with the scale filter, with primary sources.
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.