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 Preset Resolutions to lock to 720×480 (NTSC) or 720×576 (PAL) so the output matches the DVD-Video spec. 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.

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 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.