Convert M4V to M4A — Free Online Converter

M4V and M4A are both MPEG-4 containers — M4V stores video plus audio (from iTunes and Apple TV), while M4A stores audio only. Both use AAC as their primary audio codec. Converting M4V to M4A is essentially stripping the video track and keeping only the audio inside the same container family. Because the audio codec and container are nearly identical, this conversion can often be performed as a zero-cost stream copy with no re-encoding needed.

M4A is the standard audio format across Apple's ecosystem — iTunes, Apple Music, iPhone, iPad, Apple Watch, and HomePod all handle M4A natively. Extracting the audio from M4V to M4A preserves full compatibility with Apple's metadata system, including chapter markers, artwork, lyrics, and iTunes-style tags that would be lost when converting to MP3 or other formats.

FFmpeg copies the AAC audio stream directly from the M4V container into an M4A container using -vn -acodec copy. This is a remux operation — no decoding or re-encoding occurs. The audio bitstream is transferred byte-for-byte, preserving exact quality. The process takes seconds regardless of file length because only container metadata is rewritten. If the M4V contains multiple audio tracks, a specific track can be selected using the -map flag.