omnkv

omnkv is a command-line tool designed for manipulating Matroska (MKV) video files. It allows users to extract, modify, and repackage media streams within an MKV container. The primary function of omnkv is to provide a flexible way to interact with MKV files without needing to re-encode the video or audio streams, thus preserving original quality and saving processing time.

The tool supports a range of operations, including the extraction of individual tracks such as video, audio, and subtitles. Users can select specific tracks by their index and output them to separate files. Conversely, omnkv can also be used to add new tracks to an existing MKV file or replace existing ones. This functionality is particularly useful for tasks like merging audio from one source into a video from another, or adding subtitle tracks to a movie.

Beyond simple track manipulation, omnkv offers capabilities to modify metadata associated with the MKV container. This includes updating chapter information, changing titles, and altering other header-level data. The tool aims to be a lightweight and efficient alternative to more comprehensive video editing suites when the task at hand is focused solely on the container and its constituent streams. Its command-line nature makes it suitable for scripting and automated workflows.