AVI vs MOV — Differences, File Size & When to Use Each

AVI vs MOV

A detailed comparison of AVI Video and QuickTime Movie — file size, quality, compatibility, and which format to choose for your workflow.

Convert AVI → MOV Convert MOV → AVI

AVI

AVI Video

Video Files

AVI is a legacy Microsoft multimedia container that stores audio and video data. While largely superseded by modern formats, it remains widely recognized and is produced by many older devices and screen recorders.

About AVI files

MOV

QuickTime Movie

Video Files

MOV is Apple's QuickTime container format, widely used in video production on macOS and iOS. It supports high-quality codecs like ProRes and is the default recording format for iPhones and professional cameras.

About MOV files

Strengths Comparison

AVI Strengths

Simple, well-documented format — trivial for any video library to parse.
Universal Windows playback since Video for Windows in 1992.
Low encoding overhead — interleaved structure is fast to write.
Works with any codec technically, including modern ones.

MOV Strengths

Professional-grade container — supports ProRes, DNxHD, and every pro codec.
Multi-track friendly — video, audio, subtitles, chapters, markers all coexist.
Native in every major NLE (Final Cut, Premiere, Resolve, Avid).
Low overhead — the ISOBMFF structure is efficient.
Timecode, alpha channels, and HDR metadata are first-class citizens.

Limitations

AVI Limitations

Aging container — no native support for chapters, subtitles, or multi-audio selection.
File-size limits (2 GB original, 4 GB with OpenDML) break for HD content.
Variable-framerate video causes sync drift.
Larger than equivalent MP4 or MKV due to container overhead.
Poor support on iOS and Android.

MOV Limitations

Windows and Linux need QuickTime or FFmpeg-based players to read all features.
ProRes-encoded MOVs are gigantic — 4K clips run 400-900 MB/minute.
Metadata format diverges slightly from MP4, which causes interop bugs.
Older QuickTime codecs (like Animation or DV) are considered legacy.

Technical Specifications

Specification	AVI	MOV
MIME type	video/x-msvideo	video/quicktime
Extension	.avi	—
Container	RIFF	QuickTime File Format (ISO Base Media File Format)
Max file size	2 GB (original); 4 GB (OpenDML extension)	2^64 bytes
Codec support	Any codec via FourCC identifiers	—
Extensions	—	.mov, .qt
Common codecs	—	ProRes, H.264, HEVC, DNxHD, Animation

Typical File Sizes

AVI

10-min video (XviD / MP3) 100-200 MB
45-min TV episode (DivX) 350-700 MB
2-hour movie (DVD rip) 700 MB - 1.4 GB

MOV

iPhone 4K clip (HEVC, 1 min) 170-300 MB
4K ProRes 422 (1 min) 400-600 MB
1080p ProRes 4444 (1 min) 800 MB - 1.5 GB

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Frequently Asked Questions

AVI (Audio Video Interleave) is a multimedia container format introduced by Microsoft in 1992. It interleaves audio and video data streams and supports various codecs, though it lacks native support for modern features like subtitles and chapters.

AVI (Audio Video Interleave) is a multimedia container formato introduced by Microsoft in 1992. It interleaves audio e video data streams e suporta various codecs, though it lacks native support para moderno features like subtitles e chapters.

AVI files play in VLC (recommended, free), Windows Media Player, KMPlayer, and most video editing software. Some AVI files may require specific codec packs depending on the encoding used.

AVI arquivos reproduzir in VLC (recommended, grátis), Windows Media Player, KMPlayer, e most video editando software. Some AVI arquivos may require specific codec packs depending no codificação used.

MP4 is the better choice for almost all modern uses since it offers better compression, wider compatibility, and support for subtitles and chapters. AVI is mainly encountered with legacy video files and older camera recordings.

MP4 is the better choice para almost all moderno uses since it oferece better compressão, wider compatibilidade, e support para subtitles e chapters. AVI is mainly encountered com legacy video arquivos e older camera recordings.