Convert XviD to AAC — Free Online Converter

XviD, the open-source rebel of the MPEG-4 codec world, was created by reverse-engineering DivX (the name is literally DivX backwards) and releasing the code under the GPL. Throughout the 2000s, XviD-encoded AVI files dominated peer-to-peer networks and scene release groups, with the standard "one-CD rip" at 700 MB becoming the universal format for sharing movies online. These files typically contain MP3 audio at 128-192 kbps or occasionally AC3 5.1 surround sound from DVD sources.

AAC (Advanced Audio Coding) is the modern successor to MP3, delivering superior audio quality at equivalent bitrates. Converting XviD to AAC strips the MPEG-4 Part 2 video entirely and re-encodes the audio track into a format natively supported by every iPhone, iPad, Android device, YouTube, Spotify, and modern web browser.

XviD files contain audio tracks that are locked inside AVI containers alongside video data you may not need. Extracting the audio as a standalone AAC file eliminates gigabytes of video data while upgrading the audio format from early-2000s MP3 to a modern codec with better compression efficiency.

AAC is the default audio format for Apple's entire ecosystem, YouTube's audio tracks, and most streaming platforms. If you have XviD recordings of concerts, lectures, interviews, or movies where the audio is the valuable content, AAC extraction creates universally playable files at optimal quality-to-size ratios.