Avidemux: How To Extract Audio from Video Files
How to extract music/sound from a movie clip.
Avidemux: Quick And Easy Video Editing Tutorial For Beginners
Avidemux is a free and open-source video editing program designed for video editing and video processing. It is written in C++, and uses either GTK+ or Qt for its user interface.
Avidemux is capable of non-linear video editing, applying visual effects (called ”Filters” by Avidemux) to video, and transcoding video into various formats. Some of the filters were ported from MPlayer and Avisynth. Avidemux can also insert audio streams into a video file (an action known as multiplexing or ”muxing”) or extract audio streams from video files (an action known as ”demuxing”).
Avidemux supports many formats, such as AVI, MP4, Matroska, MPEG-2, H.264 and H.265. It does not yet, or only partially supports modern open formats, like Opus, WebM, VP8, VP9 and AV1.
Avidemux has built-in subtitle processing, both for optical character recognition of DVD subtitles and for rendering hard subtitles. Avidemux supports various subtitle formats, including MicroDVD (.SUB), SubStation Alpha (.SSA), Advanced SubStation Alpha (.ASS) and SubRip (.SRT).
While it is primarily a GUI program, Avidemux can also be run from the command line.