Batch Video Audio Track Extractor is a desktop audio demuxing and transcoding workbench for extracting soundtracks and multi-language audio streams from MP4, MKV, WebM, MOV, AVI, and TS video containers. A lightweight Linux alternative to Pazera Free Audio Extractor for instant lossless audio stream copy, format conversion, time slicing, and loudness normalization.

Key Features:

• Multi-Stream Audio Inspector: Probes video containers via bundled FFmpeg to display every embedded audio track with codec, bitrate, sample rate, channel layout, and language metadata.
• Instant Lossless Stream Copy: Demuxes elementary audio tracks directly without re-encoding (-vn -acodec copy) into native .m4a, .opus, .ogg, .ac3, .mp3, .flac, or .wav files with zero quality loss.
• Batch Audio Transcoding & Slicing: Converts selected or all multi-language tracks to FLAC, WAV, MP3, Opus, AAC, or Ogg Vorbis with custom bitrate, sample rate, channel downmix, and start/end timestamp slicing.
• EBU R128 Loudness & Waveform Verification: Supports integrated loudness normalization (loudnorm / dynaudnorm / dB gain) and renders real decoded PCM waveform envelopes alongside measured Peak and RMS dBFS levels.

Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by Jacek Pazera.