Convert AVI to MKV — Free Online Converter
Convert Audio Video Interleave (.avi) to Matroska Video (.mkv) online for free. Fast, secure video conversion with no watermarks or registration....
200万+文件已转换
数千用户的信赖之选
安全传输
HTTPS 加密上传
隐私优先
文件处理后自动删除
无需注册
即刻开始转换
随处可用
任何浏览器，任何设备
如何转换
Upload your .avi 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 .mkv file when it's ready.
About AVI to MKV Conversion
AVI (Audio Video Interleave) and MKV (Matroska Video) are both flexible container formats, but MKV is vastly more capable. While AVI's RIFF structure limits it to a single video track, a single audio track (in basic AVI), and no native subtitle support, MKV can hold unlimited video, audio, and subtitle tracks with full metadata, chapters, and attachments. Converting AVI to MKV repackages the content in a modern container that supports every codec imaginable — H.264, H.265, VP9, AV1, FLAC, DTS, and more.
Why Convert AVI to MKV?
MKV eliminates every limitation of AVI. If your AVI files have subtitle files (.srt, .ass) that you want to embed, multiple audio tracks to preserve, or chapters to add, MKV is the ideal container. MKV also removes AVI's original 2 GB file size limit and supports modern features like ordered chapters, segment linking, and high-precision timestamps. Media server software (Plex, Jellyfin, Kodi) handles MKV natively.
Common Use Cases
- Repackaging AVI movie files with embedded subtitles in multiple languages
- Converting AVI files with dual audio tracks (e.g., original + commentary) into a single MKV
- Migrating legacy AVI archives to MKV for better codec compatibility in media servers
- Adding chapter markers to AVI recordings for easy navigation in MKV players
- Consolidating AVI video, separate SRT subtitles, and external audio into one MKV file
How It Works
If the AVI's codecs are MKV-compatible (which they almost always are — MKV accepts virtually every codec), the conversion can be a simple remux: copying the video and audio bitstreams without re-encoding. This is near-instant and produces zero quality loss. If re-encoding is desired (e.g., to convert DivX to H.264), FFmpeg transcodes the streams to the target codecs. MKV's Matroska container uses EBML (Extensible Binary Meta Language) for efficient metadata storage.
Quality & Performance
When remuxing (stream copying), quality is identical to the original AVI — not a single bit of video or audio data is changed. When transcoding to a new codec, quality depends on the encoding settings. H.264 at CRF 18–22 in MKV produces excellent results that typically exceed the visual quality of the original DivX/XviD AVI.
Device Compatibility
| Device | AVI | MKV |
|---|---|---|
| Windows PC | Native | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | 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 remux mode (stream copy) whenever possible — it completes in seconds and preserves original quality perfectly.
- 2If you have separate .srt subtitle files alongside your AVI, select them during conversion to embed them into the MKV output.
- 3MKVToolNix (free, open-source) is an excellent tool for post-conversion editing: adding chapters, reordering tracks, or merging additional audio/subtitle streams.
- 4For media server use, ensure the video codec is H.264 and audio is AAC or AC3 — this avoids server-side transcoding on most Plex/Jellyfin clients.
- 5Set the default audio and subtitle tracks in the MKV metadata so your preferred language plays automatically.
Related Conversions
AVI to MKV conversion unlocks modern container features while preserving or improving quality. Whether you remux for speed or transcode for efficiency, MKV is the superior container for archival and media server playback.