rMux / docs / audio-management-and-tracks

Audio Management and Tracks

Extracting audio streams, muting tracks, replacing background audio, and codec support for AAC, MP3, Opus, and FLAC in rMux.

Audio Track Inspection

Containers frequently house multiple audio tracks (foreign language dubs, director commentaries, 5.1 surround mixes). rMux lets you configure each stream:

  • Direct Stream Copy: preserves existing audio bitstreams without re-sampling.
  • Audio Transcoding: converts incompatible audio formats into standard stereo AAC or MP3.
  • Channel Downmixing: downmix 5.1 surround mixes to stereo or retain all discrete channels.

Extracting Audio from Video

To save speech or music tracks as standalone audio files:

  1. Open your video in rMux.
  2. Select Audio Only in the export panel.
  3. Choose your target audio format:
    • AAC / M4A: pristine Apple high-efficiency audio.
    • MP3 (via LAME LGPL): universal playback compatibility.
    • Opus (BSD): ultra-compact, high-clarity voice and podcast encoding.
    • FLAC / WAV (PCM): lossless master fidelity.
  4. Export: rMux extracts the soundtrack in seconds.

Muting and Track Replacement

  • Mute Video: uncheck the audio track to export silent video without third-party software.
  • Replace Audio Track: import external audio files (e.g. remastered music or clean voiceovers) to substitute or supplement original camera audio.