FFmpeg Cookbook
Stream Mapping with -map — Selecting Video, Audio, and Subtitle Streams
How to explicitly select streams with FFmpeg's -map option. Practical commands for extracting multiple audio tracks, subtitles, and specific streams, plus negative mapping and metadata copying.
Add, Select, and Remove Multiple Audio Tracks — Managing Multilingual Audio with FFmpeg
How to create and edit video files with multiple audio tracks using FFmpeg. Learn to add, select, and remove audio tracks, set language metadata, mark a default track, and understand the differences between MKV and MP4.