Does this tool actually convert the video in the browser?

No. The tool generates an FFmpeg command that you run locally. No files are uploaded or processed on our servers.

Do I need to install anything?

Yes — FFmpeg must be installed on your computer. Download it free from ffmpeg.org. Once installed, paste the generated command into your terminal.

Which video codec should I use for FLV?

Use libx264 for broad compatibility and better quality. The native FLV codec (FLV1/Sorenson H.263) is an older option supported by very early Flash players.

Why is FLV still used?

FLV was the dominant web-video format from roughly 2005–2015. Legacy streaming servers, recording systems, and archival workflows still produce or consume FLV files.

Can I convert multiple files at once?

The tool generates a single-file command. For batch conversion, wrap the command in a shell loop, e.g. `for f in *.wmv; do ffmpeg -i "$f" "${f%.wmv}.flv"; done`.

What audio codec should I pick?

AAC (libfaac or aac) gives better quality at lower bitrates. MP3 (libmp3lame) is slightly more compatible with very old Flash players.

WMV to FLV Converter

Generate a ready-to-run FFmpeg command to convert WMV video files to FLV (Flash Video) format — no upload, no server, runs on your machine.

Conversion Settings

Input file path (WMV)

Output file path (FLV)

Video

Video codec

Video bitrate

Frame rate

Resolution

Audio

Audio codec

Audio bitrate

Generated FFmpeg Command

Click "Generate Command" to build your FFmpeg command.

How to Run

1 Install FFmpeg from ffmpeg.org if you haven't already.
2 Open your terminal (macOS / Linux) or Command Prompt / PowerShell (Windows).
3 Paste the generated command and press Enter.
4 FFmpeg will show progress; the FLV file appears at your output path when done.

Batch conversion (Linux / macOS)

for f in *.wmv; do
  ffmpeg -i "$f" "${f%.wmv}.flv"
done

Summary

This tool builds a customized FFmpeg command that converts Windows Media Video (WMV) files to Flash Video (FLV) format. Configure the video codec, audio codec, bitrate, frame rate, and resolution, then copy the generated command and run it locally. No files are uploaded — everything happens in your browser.

How it works

Enter the path to your WMV source file and the desired FLV output path.
Choose video settings: codec (libx264 or FLV native), bitrate, and frame rate.
Choose audio settings: codec (AAC or MP3) and bitrate.
Optionally resize the output to a preset resolution or enter a custom size.
Click "Generate Command" to produce the FFmpeg command.
Copy the command and run it in your terminal where FFmpeg is installed.

Use cases

Convert legacy WMV recordings to FLV for Flash-era video players.
Batch-convert WMV archives to FLV for older web-streaming pipelines.
Prepare WMV footage for platforms that still require FLV input.
Quickly prototype FFmpeg flags before writing a full shell script.
Generate repeatable, shareable conversion commands for team workflows.
Reduce WMV file size by tuning bitrate settings during conversion.

Frequently Asked Questions

Last updated: 2026-06-13 · Reviewed by Nham Vu