Convert Flash Video (.flv) to Audio Video Interleave (.avi) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .flv 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.
FLV (Flash Video) was built for streaming over HTTP with a simple header optimized for progressive download. AVI (Audio Video Interleave), introduced by Microsoft in 1992 as part of Video for Windows, is one of the oldest multimedia containers still in active use. AVI stores interleaved video and audio chunks using the RIFF structure. It supports virtually any codec through VfW or DirectShow codecs and remains the preferred format for DV camera imports, legacy video editors, and Windows-centric workflows. Converting FLV to AVI makes Flash content editable in traditional video production tools.
Many legacy video editing applications — from Windows Movie Maker to older versions of Adobe Premiere — work best with AVI files. AVI's frame-by-frame indexing allows precise random access and frame-accurate editing that FLV's keyframe-based seeking cannot provide. If you are working with software that does not recognize FLV or if you need to merge Flash video with DV footage, AVI conversion is essential.
FFmpeg remuxes or transcodes the FLV video stream (Sorenson Spark, VP6, or H.264) into an AVI container. When the FLV contains H.264, FourCC is set to 'H264' or 'X264'. For broader compatibility, MPEG-4 ASP (Xvid/DivX-compatible) encoding can be used. Audio is transcoded to PCM or MP3 for AVI compatibility. The AVI container uses an index chunk (idx1 or indx) at the end of the file for random access.
If using a lossless or high-quality codec (Huffyuv, UT Video, or high-bitrate MPEG-4), the AVI output matches the FLV source quality. With Xvid encoding at bitrates above 2000 kbps, visual quality is excellent. AVI with uncompressed PCM audio preserves the full decoded audio fidelity from the FLV source.
| Device | FLV | AVI |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
FLV to AVI conversion bridges the gap between web-era Flash content and traditional desktop video editing. AVI's universal codec support and frame-level indexing make it the right choice when you need maximum compatibility with legacy software.
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| No |
| الميزة | FLV | AVI |
|---|---|---|
| الاسم الكامل | Flash Video | Audio Video Interleave |
| الامتداد | .flv | .avi |
| الأفضل لـ | Small file size | Windows native |