Why convert M4V to MP4?
MP4 is accepted by virtually every video player, editor, and device, while .m4v is less widely recognised - Android devices, some smart TVs, and non-Apple editors may refuse the file or not list it in a media library, even though the content is identical. Renaming or converting to .MP4 makes the same video universally accessible without touching the encoded streams.
How to convert M4V to MP4
Rename the file BUILT-IN
For non-DRM files, rename .m4v to .mp4 - it takes one second and produces no quality change, because both formats share the same container structure.
Command line - FFmpeg CLI
Remux without re-encoding using ffmpeg -i input.m4v -c copy output.mp4 - video, audio, and chapter data are copied losslessly.
HandBrake FREE
Open the .m4v in HandBrake, set Format to MP4 in the Summary tab, choose a preset, and click Start Encode - useful when you also want to resize or change codecs.
VLC media player FREE
Use Media > Convert/Save, select MP4 as the output container, and save - note that VLC always re-encodes rather than remuxing.
Programs that convert M4V
About these formats
An M4V file is an iTunes/Apple TV video - movies, TV shows, and music videos sold or rented through Apple's store. Non-DRM M4V files open in VLC, Windows Media Player, or QuickTime.…
Open .M4V details →An MP4 file is a video container (MPEG-4 Part 14, standardized 2003) that holds video, audio, subtitles, and chapters in one file. It plays on every phone, computer, browser, and smart TV…
Open .MP4 details →Quality & what to watch
- Renaming and FFmpeg with
-c copyare lossless remux operations; HandBrake and VLC re-encode, which reduces quality to some degree even at high quality settings. - iTunes Store purchases carry Apple FairPlay DRM - renaming and converter tools will not work; these files can only be played in authorised Apple apps.
- If a converted file is rejected by a device, an AC-3 audio track is often the cause - re-encode audio to AAC with
ffmpeg -i input.m4v -c:v copy -c:a aac output.mp4.
Frequently asked questions
Can I just rename M4V to MP4?
How do I know if my M4V has DRM?
Does converting M4V to MP4 reduce quality?
-c copy, which copies the encoded data without touching it. Tools that re-encode (HandBrake, VLC) reduce quality to some degree.Why does my M4V play in QuickTime but not in Premiere Pro?
.mp4 and it will import normally.