AVI to FLV Converter

Convert AVI to FLV online. See the real timed-stream transcoding behavior, preservation limits, and a format-specific acceptance test.

Choose Files or drop a video file here Preview it before choosing the output settings

Max file size 1 GB. Sign in to save your results.

By proceeding, you agree to our Terms of Use.

◈ Encrypted transfer◷ Short retention⊘ No watermark◎ Works on every device

How AVI turns into FLV: timed-stream transcoding

Decoding AVI recovers the picture, sound, and timing streams it carries; writing FLV means re-expressing that under a different codec and container profile. Duration commonly survives untouched even while compression, channel mapping, cadence, metadata, or auxiliary streams do not. AVI is reconstructed from RIFF indexes and interleaved chunks; codec tags, frame timing, keyframes, and audio alignment determine whether seeking remains stable. FLV delivery uses a retired Flash-era streaming container; even a correctly encoded file needs a dedicated player because current browsers do not restore Flash playback.

Decoded from an older Microsoft media container commonly paired here with Xvid video and MP3 audio. Encoded to the legacy Flash Video container historically used for browser streaming.

INPUT MODEL

AVI

AVI video container

Used for recorded motion video with an accompanying soundtrack.

Family: Video
MIME: video/x-msvideo

→

OUTPUT MODEL

FLV

FLV video container

Designed for moving images, timed audio, and playback metadata.

Family: Video
MIME: video/x-flv

AVI source facts versus FLV output requirements

AVI

What can fail when AVI video container is interpreted

AVI has limited support for modern metadata, captions, variable frame rates, and some web players.

FLV

What FLV video container cannot safely promise

Current browsers no longer provide native Flash playback, and FLV may contain older codecs with limited hardware decoding.

ENGINE

How the FLV writer handles this route

The writer builds the legacy Flash Video container historically used for browser streaming and labels the result as video/x-flv. The receiving application - Not the extension alone - Is the final compatibility test.

Acceptance evidence for the converted FLV

BEFORE

Record the AVI evidence before conversion

Test seeking and audio sync in the target player, not only the opening frame.

AFTER

Test the FLV file in its receiving workflow

Inspect codecs, dimensions, frame rate, duration, audio sync, keyframe seeking, and the complete transcoded result.

When to actually choose AVI to FLV

Switch to FLV only once the destination player, editor, or service has confirmed support for its exact container and codecs. If extra tracks or the original encoding must survive, AVI remains the safer choice.

What changes between the AVI model and the FLV deliverable

Timed frames possible in AVI cannot remain an animation in FLV; verify which frame or static rendering was used.
Metadata handling differs between AVI and FLV; do not assume every application-specific field carries across untouched.