Convert M4V to AVI — Free Online Converter
Convert MPEG-4 Video (Apple) (.m4v) to Audio Video Interleave (.avi) online for free. Fast, secure video conversion with no watermarks or registration...
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Upload your .m4v file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .avi file when it's ready.
About M4V to AVI Conversion
M4V is Apple's MPEG-4 container with optional FairPlay DRM, using H.264 video and AAC audio — the standard format for iTunes Store content. AVI (Audio Video Interleave) is Microsoft's classic multimedia container, introduced in 1992, which interleaves audio and video data in a straightforward RIFF structure. Converting M4V to AVI bridges the Apple and Windows ecosystems, producing files compatible with legacy Windows applications, older media players, and video editing software that predates modern codec support.
Why Convert M4V to AVI?
AVI remains the required input format for many legacy Windows applications, older video editors like Windows Movie Maker, and certain industrial or embedded systems. Some DVD authoring tools and hardware media players with USB inputs expect AVI format specifically. If you have Apple-sourced M4V content that needs to work in these Windows-centric or legacy environments, AVI is the necessary target format.
Common Use Cases
- Importing M4V video into Windows Movie Maker or other legacy video editors
- Playing Apple content on older Philips, LG, or Samsung TVs with USB AVI support
- Preparing M4V files for DVD authoring tools that require AVI input
- Sharing Apple videos with colleagues using legacy Windows XP or Vista systems
- Feeding video content into industrial inspection or surveillance systems that accept only AVI
How It Works
FFmpeg transcodes the M4V's H.264 video to MPEG-4 Part 2 (or retains H.264 if the target player supports it) and wraps it in Microsoft's RIFF-AVI container. Audio is converted from AAC to MP3 or uncompressed PCM, as AVI's native audio support is limited compared to MPEG-4. The interleave format stores alternating audio and video chunks, which simplifies seeking but results in slightly larger files due to overhead.
Quality & Performance
When transcoding to MPEG-4 Part 2, expect a minor quality reduction compared to the H.264 source. If the AVI player supports H.264 (e.g., via DivX/Xvid-compatible decoders), you can copy the video stream directly with no quality loss. AVI files are typically 10-20% larger than equivalent MP4 files due to the less efficient container format.
Device Compatibility
| Device | M4V | AVI |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Native | Partial |
| iPhone/iPad | Native | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Recommended Settings by Platform
YouTube
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
TikTok
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Twitter/X
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Discord
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
Tips for Best Results
- 1Use MPEG-4 Part 2 video codec for maximum AVI player compatibility, or H.264 if your player supports it
- 2Choose MP3 audio over PCM to keep file sizes reasonable while maintaining good audio quality
- 3Set the AVI interleave to 1 second intervals for smooth seeking in legacy players
- 4If the target system has specific resolution requirements, set the output to match (e.g., 720x480 for NTSC DVD)
- 5For very old systems, limit the video bitrate to 1500 kbps to ensure smooth playback on weak hardware
Related Conversions
M4V to AVI conversion is a practical bridge between Apple's modern video format and the legacy Windows ecosystem. While AVI is not the most efficient container, it remains essential for compatibility with older software and hardware.