Convert M4V to AIFF — Free Online Converter

M4V, Apple's DRM-capable video container, stores H.264 video with AAC audio — the standard codecs for iTunes Store purchases and Apple TV content. AIFF (Audio Interchange File Format) is Apple's uncompressed audio format, storing raw PCM data at full CD quality or higher. Converting M4V to AIFF extracts the audio track and decodes it to uncompressed PCM, producing a lossless representation of the sound at the cost of significantly larger file sizes.

AIFF provides bit-perfect, uncompressed audio that professional audio workstations like Logic Pro, Pro Tools, and GarageBand can import directly without any codec overhead. If you need to edit, remix, or master audio extracted from M4V video content on macOS, AIFF is the native uncompressed format that integrates seamlessly with Apple's audio production ecosystem.

FFmpeg decodes the AAC audio stream from the M4V container and outputs it as uncompressed PCM in the AIFF container. The typical output is 16-bit signed big-endian PCM at 44.1 kHz or 48 kHz stereo, matching CD or broadcast quality. Since AIFF stores raw samples, the output file is approximately 10 MB per minute of stereo audio at 44.1 kHz/16-bit. The conversion is one-directional in terms of quality — the AAC lossy compression cannot be undone, but no further quality loss occurs.