Convert FLAC to AVI online

To convert FLAC to AVI, upload the FLAC file, start the conversion and download the result: Converter.now writes an AVI with Xvid (MPEG-4 Part 2) video and MP3 audio. Because FLAC has no picture, a still black 1280x720 frame is added so the AVI is a real video that video sites accept. AVI is a lossy format, so the file is usually much smaller but some fine detail is discarded; keep your FLAC original.

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FLAC to AVI at a glance

Converts: Free Lossless Audio Codec → AVI video container
Output: An AVI with Xvid (MPEG-4 Part 2) video and MP3 audio
Compression: FLAC: lossless → AVI: lossy
Engine: FFmpeg
Privacy: Private download link; files are deleted after 6 hours. No account needed.

How FLAC turns into AVI: Audio-only container delivery

The available FLAC audio is encoded into the AVI media container. Converter.now does not synthesize artwork or moving pictures, so an audio-only source can produce a AVI file without a meaningful video stream. FLAC frames decode to lossless samples, but the stream can still carry unusual channel assignments, sample rates, cuesheets, and Vorbis-comment metadata. AVI output interleaves indexed audio and video chunks in a legacy RIFF container whose subtitle, modern metadata, and variable-frame-rate behavior is limited.

Decoded media - Losslessly compressed audio that preserves decoded samples and supports rich tags. Encoded delivery profile - An older Microsoft media container commonly paired here with Xvid video and MP3 audio.

For related jobs, compare other FLAC converters with the full list of AVI conversions.

Before converting a whole batch, read the difference between a container and a codec; it explains why a familiar extension can still fail to play.

FLAC

Free Lossless Audio Codec

Used for lossless music archiving.

Family: Audio
MIME: audio/flac

→

AVI

AVI video container

Designed for recorded motion video with an accompanying soundtrack.

Family: Video
MIME: video/x-msvideo

Reading FLAC correctly and satisfying what AVI expects

What can fail when Free Lossless Audio Codec is interpreted

FLAC does not make a lossy source lossless again, and some basic players reject less common sample rates or channel layouts.

What AVI video container cannot safely promise

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

How the AVI writer handles this route

The verified AVI profile uses Xvid video and MP3 audio for compatibility with older AVI workflows.

How to confirm the converted AVI actually works

Record the FLAC evidence before conversion

Compare duration, sample rate, channels, peak levels, and tags with the decoded source.

Test the AVI file in its receiving workflow

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

The delivery decision for this FLAC to AVI route

Use this route only when the receiving workflow specifically accepts audio inside AVI. It is not a music-visualizer or slideshow generator.

What changes between the FLAC model and the AVI deliverable

Because FLAC has no picture, a still black 1280x720 frame is added so the AVI is a real video that video sites accept.
AVI is a lossy format, so the file is usually much smaller but some fine detail is discarded; keep your FLAC original.
FLAC and AVI use different metadata conventions, so application-specific fields should be treated as optional until verified.