Free online M4V to WAV converter

Video editors, audio workstations, and archival systems may require the soundtrack as a standalone WAV file rather than embedded in an M4V video. Converting creates an uncompressed PCM audio file for editing, analysis, playback, or systems that do not accept M4V.

What the M4V format is

M4V is an MPEG-4 container commonly associated with Apple software and devices, including iTunes-era video libraries, Apple TV exports, QuickTime, and some video-editing applications. It can contain H.264 or another video codec, AAC or another audio codec, subtitles, chapters, and metadata.

Some M4V files use Apple FairPlay DRM. Protected files generally cannot be processed by a converter; use an authorized unprotected copy or an export function provided by the service or application that supplied the video. Changing the filename extension does not remove protection or convert the audio.

What the WAV format is

WAV is usually a RIFF container carrying uncompressed PCM audio. Operating systems, media players, audio editors, digital audio workstations, and measurement software support standard PCM WAV files.

Because PCM WAV does not apply another lossy compression stage, it is suitable for cutting, mixing, noise reduction, speech analysis, and mastering. It cannot restore information already discarded when the M4V soundtrack was encoded as AAC or another lossy format. Stereo 44,100 Hz, 16-bit PCM requires about 10.6 MB per minute, so WAV files are substantially larger than the source audio stream.

How to convert an M4V file to WAV

Using FFmpeg

FFmpeg is the most direct desktop option because it can discard the video stream and decode only the audio. After installing FFmpeg, open a terminal in the folder containing the M4V file and run:

ffmpeg -i input.m4v -vn -c:a pcm_s16le output.wav

-vn excludes video, and pcm_s16le creates widely compatible 16-bit little-endian PCM. FFmpeg normally retains the input audio sample rate and channel layout unless you specify replacements.

For a 24-bit WAV sampled at 48 kHz, use:

ffmpeg -i input.m4v -vn -ar 48000 -c:a pcm_s24le output.wav

To inspect codecs, sample rate, channels, and available streams before conversion, run:

ffmpeg -i input.m4v

If the file has multiple audio tracks, select one explicitly. This command selects the second audio stream:

ffmpeg -i input.m4v -map 0:a:1 -vn -c:a pcm_s16le output.wav

Stream indexes start at zero, so 0:a:1 means the second audio stream. WAV supports limited metadata compared with M4V; use -map_metadata 0 only when retaining compatible source metadata is useful:

ffmpeg -i input.m4v -vn -map_metadata 0 -c:a pcm_s16le output.wav

Using 101convert.com

You can convert the file for free on 101convert.com without installing software. Upload the M4V file, choose WAV as the output format, start the conversion, and download the resulting file when processing finishes. Use a local desktop conversion instead for confidential material or files that cannot be uploaded.

Quality and compatibility limits

Converting lossy AAC audio to WAV makes the result easier to edit but does not improve its fidelity. A 24-bit output or higher sample rate can provide an appropriate working format for production, but it cannot recreate detail missing from the original stream.

Choose standard PCM, such as pcm_s16le or pcm_s24le, for broad application support. If the destination accepts only stereo 16-bit audio, downmix or reduce the bit depth explicitly; for example, ffmpeg -i input.m4v -vn -ac 2 -ar 44100 -c:a pcm_s16le output.wav. Multichannel, floating-point, or unusual sample-rate WAV files may be rejected by older applications.

Standard RIFF WAV has a practical file-size limit near 4 GB. Very long, high-resolution recordings may require RF64 or separate files if the destination supports neither large WAV files nor RF64. Decoder errors can indicate DRM protection, an unsupported codec, a damaged file, or an outdated FFmpeg build.