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Supports: AVI
AVI is Microsoft's 1992 container format, dominant in the DivX / XviD era and still common in legacy archives, security camera exports, and old camcorder footage. M4V is Apple's library-flavored MPEG-4: same MP4 container under the hood, but the.m4v extension signals to iTunes, the Apple TV app, and TV.app that the file belongs in your media library and can carry Apple-specific metadata (chapter markers, closed captions, multi-track Dolby audio, FairPlay DRM flags). Converting AVI → M4V is how legacy video libraries make it into the Apple ecosystem.
| Property | AVI | M4V (Apple MPEG-4) |
|---|---|---|
| Created by | Microsoft (1992) | Apple |
| Container | RIFF / Audio Video Interleave | MPEG-4 Part 14 (same as MP4) |
| Common video codecs | DivX, XviD, MPEG-4, MJPEG, uncompressed | H.264, HEVC |
| Common audio codecs | MP3, PCM, AC-3 | AAC, AC-3, EAC-3 |
| File size at same quality | Larger (older codecs, container overhead) | 40-60% smaller |
| Chapters / closed captions | No standardized support | Native support |
| DRM | None | Optional FairPlay (iTunes Store purchases) |
| Apple TV / iTunes / TV.app | Not supported | Native library format |
| iPhone / iPad playback | Not supported by Photos / Files | Universal |
| Best for | Legacy Windows archives | Apple-ecosystem playback and library organization |
| Codec | File size (relative) | Compatibility | Best for |
|---|---|---|---|
| H.264 | 100% (baseline) | Every Apple device, every Apple TV generation | Default — universal Apple compatibility |
| H.265 / HEVC | ~60% | iPhone / iPad / Mac (2017+), Apple TV 4K, tvOS 11+ | Smaller files, 4K library content, modern devices |
Yes. XConvert reads all common AVI codecs including DivX, XviD, MPEG-4 ASP, Motion JPEG, and uncompressed video, and re-encodes the video stream to H.264 or HEVC inside the M4V container. The audio track (MP3, PCM, or AC-3 in most AVI files) is converted to AAC, which is the codec M4V expects.
Yes — H.264 or HEVC inside an M4V container is exactly what TV.app, the legacy iTunes app on Windows, and the Music app on Mac (for music videos) expect. Drop the converted file into the appropriate library folder or drag it onto the app and it appears under Home Videos or Movies depending on your library settings.
Pick H.264 if you want the file to play on every Apple device ever made, including original Apple TV (1st-3rd gen) and older iPads. Pick H.265 / HEVC if your devices are from 2017 or later (iPhone 7 / iPad Pro 2017+ / Apple TV 4K) — files are roughly 40% smaller at the same visual quality, which matters for 4K library content and iCloud Drive storage.
The two formats share the same MPEG-4 Part 14 container, so technically MP4 plays anywhere M4V does. The difference is signalling: TV.app, iTunes, and the Apple TV remote treat.m4v files as library content (Home Videos / Movies / Music Videos) and surface Apple-specific metadata like chapter markers and Dolby audio flags. M4V is the right pick if your file is destined for the Apple library; if you want a universal file that also plays on Android and Windows by default, convert to MP4 instead.
Typically 40-60% smaller for the same visual quality. AVI's older codecs (DivX, XviD, MPEG-4 ASP) and container overhead produce larger files than modern H.264; HEVC roughly halves that again. A 1 GB DivX AVI usually lands at 400-600 MB as H.264 M4V, or around 250-350 MB as HEVC M4V.
Yes — use the trim section to enter a start time and duration in seconds (12.5) or HH:MM:SS.sss (00:01:30.500). This is useful for cutting commercials out of old TV captures or trimming the dead frames at the start and end of an old camcorder AVI before it lands in your TV.app library.
Many AVI files from MiniDV camcorders and TV captures are interlaced (60i / 50i). The default conversion preserves the source frame rate; if you see combing artifacts on Apple TV or iPhone, drop the resolution preset to a progressive output (480p / 720p) which forces deinterlacing during the resize stage.
Yes — drop in multiple.avi files (DVD rips, camcorder captures, security footage) and they convert in parallel withon our servers. Download individually or as a single ZIP. Settings can apply uniformly across the batch or be set per-file. For other Apple-ecosystem targets see AVI to MOV, and for universal output see AVI to MP4.