FLV to VOB Converter

Convert FLV to VOB: What This Tutorial Covers

This walk-through is for anyone holding an old Flash Video (.flv) clip — a downloaded web video, a courseware export, a screen capture from the Flash era — who wants it on a DVD a standalone player can read. A DVD player can't open FLV or its H.264/VP6/Sorenson video, so the file has to be re-encoded into the MPEG-2 that DVD-Video uses and packaged in a VOB. Here you'll get the four-step conversion, the codec and resolution choices that actually matter, and an honest account of what a bare .vob is and isn't. If you only want the clip to play on a phone, browser, or modern TV, skip all of this and use FLV to MP4 instead — VOB is strictly for authoring a physical DVD.

How to Convert FLV to VOB

1. Upload Your FLV File: Drag and drop your .flv onto the page, or click "+ Add Files" to browse. You can queue several clips at once and convert them with the same settings.
2. Set the Preset: Open Advanced Options and leave Preset on "Very High (Recommended)" so the MPEG-2 encoder spends enough bitrate to keep a downscaled standard-definition picture clean. The video codec defaults to MPEG-2 (DVD's required codec) and audio defaults to MP2.
3. Pick a Resolution and DVD Audio: Under Video resolution, use Width x Height to lock to 720×480 (NTSC) or 720×576 (PAL) so the output matches the DVD-Video spec — the Preset Resolutions list sets height alone and lets the width follow your source's aspect ratio. Switch audio to AC-3 if you want Dolby Digital; use Trim → Time Range to keep only part of a long clip.
4. Convert and Download: Click Convert and save the .vob. No sign-up, no watermark.

Walk-through: Getting a Clean DVD-Spec VOB

The two decisions that make or break this conversion are the resolution and the bitrate, because you're moving from an efficient modern codec down to MPEG-2 inside a rigid standard-definition box.

• If your FLV is HD-ish (a 720p or 1080p H.264-in-FLV file): it must be downscaled to 720×480 or 720×576 — DVD-Video has no HD mode at all. Lock the resolution with a Preset and accept that the result is standard-definition; downscaling can't be undone later.
• If you want the picture to hold up on a TV: keep Preset on "Very High". MPEG-2 is far less efficient than H.264 or VP6, so it needs roughly 5-8 Mbps for clean standard definition. A single VOB is capped at 1 GiB by the DVD spec, so very long clips are split across multiple numbered VOB files automatically.
• If you're targeting a specific region's player: pick NTSC (720×480, 29.97 fps — North America, Japan) or PAL (720×576, 25 fps — most of Europe, Africa, and much of Asia) to match the hardware.
• If you only need a segment: set Trim → Time Range before converting so you don't waste bitrate (and disc space) on footage you'll cut anyway.

Because both FLV's codecs and MPEG-2 are lossy, this is a lossy-to-lossy re-encode: no detail the FLV already threw away can come back, and the VOB will usually be larger than the FLV it came from. That's expected — this conversion buys DVD-player compatibility, not a smaller or sharper file.

What DVD-Video Actually Requires

Every setting on this page exists to land inside the boxes the DVD-Video specification drew in the mid-1990s. Nothing about it is negotiable if a standalone player has to read the disc:

NTSC or PAL — Which Should You Pick?

Pick whichever standard the player you are burning for was built around. Many modern DVD players read both, but older hardware often does not, and a disc in the wrong standard is the most common reason a burn refuses to play.

Common Errors and How to Fix Them

• "The .vob plays on my PC but my DVD player won't load the disc." A lone VOB isn't a finished DVD. A standalone player needs the full VIDEO_TS folder with IFO (navigation) and BUP (backup) files, which DVD-authoring software builds — see "When This Doesn't Work" below.
• "The video looks soft or blocky on the TV." MPEG-2 was starved of bitrate. Set Preset to "Very High" (or raise the bitrate under File Compression) so standard-definition detail survives the re-encode.
• "There's no sound on the DVD." DVD-Video doesn't allow AAC — the audio FLV files often carry. Make sure the output audio is MP2 (the default) or AC-3; both are valid DVD audio codecs.
• "My widescreen clip is stretched or letterboxed wrong." DVD is a 720×480/576 raster; a 16:9 source needs anamorphic flagging in the authoring step, not just a resize. Convert to MP2/MPEG-2 here, then set the aspect ratio in your DVD-authoring tool.
• "The player rejects the disc entirely." You may have picked the wrong TV standard. Try the other of NTSC/PAL, or use a player that reads both.

When This Doesn't Work

Some FLV files can't be converted: clips that were downloaded as DRM-wrapped streams, or files that were truncated mid-download and are missing their index, will fail or produce a broken VOB. And remember the output is the video object only — to get a disc that boots in a living-room player you still need DVD-authoring software (DVDStyler is free; ImgBurn handles the burn) to add menus and write the VIDEO_TS structure. If your real goal is just to watch or share the clip rather than press a physical disc, convert to MP4 for a universally playable H.264 file, or shrink an oversized clip with the Video Compressor instead.

Frequently Asked Questions

Why won't my DVD player just read the FLV file directly?

DVD-Video players only decode MPEG-2 (and some MPEG-1) video wrapped in the DVD's VOB/VIDEO_TS structure — that's the entire standard, finalized back in 1996. FLV is an Adobe Flash container holding Sorenson Spark, VP6, or H.264 video, none of which a DVD player's hardware decoder understands. Even though the Flash plug-in reached end-of-life on December 31, 2020, the deeper issue is the codec mismatch: a DVD player simply has no path to play H.264-in-FLV. Converting to MPEG-2-in-VOB is what makes the footage readable by that hardware.

Which codecs does this converter put inside the VOB?

The video is re-encoded to MPEG-2 (H.262), the codec DVD-Video requires, and audio defaults to MP2 (MPEG Audio Layer II), which every DVD player supports. You can switch audio to AC-3 (Dolby Digital) under Advanced Options — the other widely compatible DVD choice and the one preferred for 5.1 surround on NTSC discs. DVD-Video also permits Linear PCM and DTS, but it never allows AAC, which is why FLV audio is always re-encoded rather than copied.

Will my HD or H.264 FLV stay high-definition in the VOB?

No. DVD-Video is standard-definition only — 720×480 (NTSC) or 720×576 (PAL) — so any larger FLV is downscaled to fit. A modern H.264-in-FLV clip that looked sharp on screen will end up at DVD resolution, which is normal on a TV through a DVD player but is no longer HD. Downscaling can't be reversed, so keep a copy of the original FLV if you might want full resolution again.

Is the VOB this produces a finished, playable DVD?

Not on its own. A VOB holds the multiplexed MPEG-2 video and DVD audio, but a complete DVD-Video disc also needs IFO (navigation) and BUP (backup) files inside a VIDEO_TS folder that authoring software builds. Use this converter to produce the MPEG-2 VOB, then import it into a DVD-authoring tool to add menus and write a disc a standalone player will boot. Players like VLC and MPV can open the loose .vob directly if you only want to preview it on a computer.

Why is my VOB bigger than the original FLV?

DVD-Video uses MPEG-2, which is much less efficient than the H.264 or VP6 inside most FLV files. Even after downscaling to standard definition, MPEG-2 needs a high bitrate to look clean, so the VOB often ends up larger than the source. That's inherent to the format, not a tool flaw — this conversion targets DVD compatibility, not file-size savings. If you want a smaller, modern file, keep the footage as MP4 or use the Video Compressor.

Should I really convert to VOB, or is MP4 the better target?

For almost everyone, MP4. VOB only makes sense when you genuinely need to author or play footage on a standalone DVD player — there's no other modern reason to encode to MPEG-2. In our testing, the same 480p Flash-era clip converted to an H.264 MP4 played in every modern browser and on phones, while the VOB version was only useful once burned into a VIDEO_TS structure. If your end goal is a physical DVD, VOB here is the right starting point; for playback or sharing anywhere else, use FLV to MP4. The reverse trip — ripping an existing disc back to a modern file — is VOB to MP4.

How much video actually fits on a DVD?

It comes down to the bitrate you encode at, since the disc capacity is fixed. A single-layer DVD-5 holds 4.7 GB, and at around 5 Mbit/s — a bitrate that keeps standard-definition MPEG-2 clean for typical material — that works out to roughly two hours of video plus audio. Push toward the specification's ceiling of about 9.8 Mbit/s for the sharpest possible picture and you get closer to an hour. A dual-layer DVD-9 at 8.5 GB roughly doubles either figure. If your converted clip is longer than the disc allows, lower the Preset (accepting softer motion) or trim the footage before converting rather than after.

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

Your FLV 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.