在线将 FLV 转换为 AVI — 免费且快速 | ConvertIntoMP4 | ConvertIntoMP4

了解更多关于FLV转AVI的信息

如何转换

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.

关于FLV转AVI

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.

为什么要将FLV转换为AVI？

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.

常见使用场景

Importing FLV clips into older versions of Adobe Premiere, Vegas Pro, or Windows Movie Maker for editing
Merging FLV screen captures with DV camera footage in a legacy NLE that requires AVI input
Creating uncompressed AVI intermediates from FLV for professional color grading workflows
Converting FLV web rips for playback on standalone DVD players that support AVI via USB
Archiving FLV content in a widely recognized container for long-term digital preservation

工作原理

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.

质量与性能

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.

FFMPEG EngineModerateMinimal Quality Loss

设备兼容性

Device	FLV	AVI
Windows PC	Partial	Native
macOS	Partial	Partial
iPhone/iPad	Partial	Partial
Android	Partial	Partial
Linux	Partial	Partial
Web Browser	No

各平台推荐设置

YouTube

Resolution: 1920x1080

Bitrate: 8-12 Mbps

H.264 recommended for fast processing

Instagram

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

获得最佳效果的技巧

1Use Xvid encoding at 2000-4000 kbps for the best balance of quality, compatibility, and file size in AVI
2Choose PCM audio (instead of MP3) in the AVI container if you plan to edit — PCM avoids audio sync issues in some NLEs
3If the FLV source is small (under 640x480), avoid upscaling — keep the original resolution for a clean AVI output
4Add an AVI index during conversion (FFmpeg does this by default) to ensure proper seeking in all players
5For archival purposes, consider lossless AVI (FFV1 or Huffyuv) to capture every detail from the decoded FLV source

常见问题

Standard AVI has a 2 GB file size limit. OpenDML (AVI 2.0) extends this to 256 GB using extended index chunks. Our converter outputs OpenDML-compatible files, so large FLV conversions are not a problem.

For editing, use a lossless codec (Huffyuv or FFV1) for zero quality loss. For sharing and playback, Xvid (MPEG-4 ASP) at 2000+ kbps offers great quality with broad compatibility. For raw quality, uncompressed RGB is an option but produces very large files.

Windows Media Player plays AVI files natively if the codec is supported. H.264 in AVI may require additional codecs. Xvid/DivX AVI plays on virtually every Windows installation with standard codec packs.

AVI has limited subtitle support — it can embed SRT-style subtitles using specific FourCC codes, but most players do not render them. For subtitles, MKV or MP4 are better container choices.

Yes. Using the rawvideo codec with RGB24 or YUV420P pixel format produces a completely uncompressed AVI file. Expect roughly 30 MB per second of 640x480 footage — it is very large but preserves every decoded pixel.

While YouTube accepts AVI, MP4 with H.264 is strongly recommended because it processes faster and has predictable quality. AVI is best suited for archival, editing, and legacy playback — not modern web distribution.

Convert FLV to AVI — Free Online Converter

如何转换

关于FLV转AVI

为什么要将FLV转换为AVI？

常见使用场景

工作原理

质量与性能

设备兼容性

各平台推荐设置

YouTube

Instagram

TikTok

Twitter/X

WhatsApp

Discord

获得最佳效果的技巧

相关转换

常见问题

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反向转换

将FLV转换为其他格式

将其他格式转换为AVI

将FLV转换为其他格式

将其他格式转换为AVI

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FLV 与 AVI 对比

特性	FLV	AVI
全称	Flash Video	Audio Video Interleave
扩展名	.flv	.avi
最适合	Small file size	Windows native