MPG to FLV Converter

Convert MPG to FLV Online

MPG is an MPEG-1/MPEG-2 program stream from the VCD, DVD, and digital-TV era; FLV (Flash Video) is the Adobe container that delivered nearly all web video through the 2000s and early 2010s, including YouTube's and Vimeo's original streams. This conversion exists almost entirely for legacy reasons: a Flash-era web player, CMS, or e-learning toolchain (Articulate/Captivate-vintage) that still ingests .flv. Be clear up front — for phones, browsers, and any modern site, MPG to MP4 is the universal pick. Convert to FLV only when something on the other end genuinely demands it.

MPG Format at a Glance

FLV Format at a Glance

How to Convert MPG to FLV

1. Upload Your MPG File: Drag and drop your .mpg or .mpeg file onto the page, or click "+ Add Files" to browse. Batch upload is supported, so you can queue several disc rips or TV captures at once.
2. Pick Video Codec and Quality Preset: Under Advanced Options, Video Codec defaults to FLV (Sorenson Spark) for the broadest legacy-player compatibility; switch it to H.264 if your target tool accepts H.264-in-FLV for sharper output at the same size. Leave Quality Preset on "Very High (Recommended)", or open File Compression for Constant/Variable Bitrate or Constant Quality (CRF).
3. Resolution and Trim (Optional): Under Video resolution choose "Keep original", a Preset Resolution, Resolution Percentage, or a custom Width x Height. Use Trim → Time Range to cut one segment out of a long capture in the same pass.
4. Convert and Download: Click "Convert" and save your .flv file. No sign-up, no watermark.

Frequently Asked Questions

Is FLV dead now that Flash Player is gone?

The Flash web-delivery workflow is dead, but the file format is not unreadable. Adobe ended Flash Player support on December 31, 2020 and began blocking Flash content on January 12, 2021, so no browser plays .flv natively anymore and no modern site serves it. The container itself, however, still opens in VLC, ffmpeg, and MPV-class players because those decoders never depended on the Flash plug-in. This is the key difference from .swf: an FLV is plain audio/video you can still play and re-convert, whereas SWF was an executable application that has no standalone runtime left. Convert to FLV only when a specific legacy system requires that extension — otherwise prefer MPG to MP4.

Which video codec does this output put inside the FLV?

By default, FLV (Sorenson Spark), the original H.263-based codec that every Flash Player from version 6 onward could decode — the safest choice for old players. If your downstream tool is newer (Flash Player 9 Update 3 from December 2007 added H.264-in-FLV support), switch Video Codec to H.264 under Advanced Options for noticeably better quality at the same bitrate. We do not target On2 VP6 here; Sorenson Spark and H.264 cover the realistic compatibility range.

Will converting MPG to FLV improve the picture quality?

No — and that is an honest limit, not a tool flaw. MPG holds MPEG-1 or MPEG-2 video, and FLV holds Sorenson Spark or H.264, so the conversion is always a full lossy-to-lossy re-encode. The MPEG-2 picture is decoded and re-compressed from scratch, which means no detail the original already discarded can be regained, and a standard-definition DVD or VCD source stays standard-definition. To keep second-generation loss invisible, leave Quality Preset on "Very High" or pick a generous CRF target so the FLV encoder isn't the bottleneck.

What happens to the MP2 audio from my MPG?

MPG files usually carry MPEG Audio Layer II (MP2), and FLV does not support MP2. The audio is therefore re-encoded — the output defaults to AAC, with MP3 also available under Audio Codec, both of which Flash-era players expect. The primary audio track is preserved; multi-track audio is reduced to the main stream, since FLV is built around a single audio track per file.

Should I really use FLV, or is MP4 the better target?

For almost everyone, MP4. FLV made sense when Flash Player was installed on virtually every desktop; that era ended in 2021. In our testing, the same 720x480 DVD-rip MPG converted to an H.264 MP4 played in every modern browser and mobile device, while the FLV version required VLC or a dedicated player to open. Choose FLV only when a legacy Flash-based web player, learning-management system, or courseware tool will not accept anything else — in that one case it is the right answer. For every other use, MPG to MP4 is smaller, sharper at the same size, and universally playable.

How are my files handled, and how long are they kept?

Your file is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after the conversion — no sign-up, no watermark, never shared or made public.