MPEG-2 to WebM Converter

MPEG-2 vs WebM — Which Should You Convert To?

Almost everyone who lands here has the same file: a DVD rip or a broadcast capture in MPEG-2, the format standardised as ITU-T H.262 back in July 1995, and a destination that will not play it. The short answer is that WebM is the right target whenever the destination is a browser or a web page, because MPEG-2 has no native browser support at all while WebM sits at roughly 96% globally, and because VP9 is a vastly more modern codec than MPEG-2 Part 2. Stay on MPEG-2 only when the consumer is DVD-era hardware or a broadcast chain that specifically wants it. This page lays out the trade in full, then converts.

Side-by-side Comparison

When to Stay on MPEG-2

• The destination is DVD-authoring software, a set-top box, or broadcast playout equipment that wants MPEG-2 program or transport streams.
• You are archiving the capture as-is and want to avoid a second lossy generation. Every conversion here re-encodes; there is no stream-copy path.
• The material is interlaced and the downstream chain expects interlaced content — a broadcast workflow, for instance.
• You need a transport-stream variant rather than a web file, in which case MPEG-2 to TS is the page you want.

When to Convert to WebM

• The video has to play inline in a <video> element. MPEG-2 will not; WebM will, across roughly 96% of browsers.
• You want the smallest sensible file for the same picture. VP9 is generations ahead of MPEG-2 Part 2 in coding efficiency, so DVD-era footage typically shrinks substantially.
• You need a royalty-free format for a policy reason, and you want the one that browsers actually decode — as opposed to Ogg, whose Theora video has been disabled or removed across Chrome, Edge, Firefox and Opera.
• You are publishing rather than archiving, so a second lossy generation is an acceptable price for reach.

How to Convert MPEG-2 to WebM

1. Upload Your MPEG-2 File: Drag and drop your .mpeg2 file onto the page or click "+ Add Files" to browse. Batch conversion is supported and every queued file uses the same settings.
2. Keep VP9 or Change the Video Codec and Audio Codec: Video Codec offers VP9 (the default), VP8 and AV1; Audio Codec offers Opus (the default) and Vorbis. VP9 with Opus is the right combination for almost every web use.
3. Set File Compression and Video resolution: File Compression opens on Quality Preset at "Very High (Recommended)"; with VP9 selected you can also use Constant Quality or Constraint Quality, both exposing a 16–63 quality value where lower means better. Video resolution defaults to Keep original; presets from 4320p to 144p set height with width following the source aspect. Trim exports a Time Range.
4. Convert and Download: Click Convert and download the .webm. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours — no sign-up, no watermark.

Picking the WebM Video Codec

For audio, Opus is the default and the better codec; Vorbis is there for tooling that predates Opus. WebM carries only these two, which is a container restriction rather than a limitation of this page.

Frequently Asked Questions

Will converting MPEG-2 to WebM lose quality?

Some, unavoidably. This is a re-encode rather than a re-wrap: MPEG-2 is a lossy codec, VP9 is a different lossy codec, and there is no stream-copy path between them, so the picture is decoded and re-compressed and picks up a second generation of loss. At the default "Very High" preset that is difficult to spot in normal viewing, but the output can only ever match the source, never exceed it. Upscaling the resolution enlarges pixels rather than recovering detail — a 480i DVD does not become HD by asking for 1080p.

My DVD-era MPEG-2 is interlaced — will the WebM show comb lines?

Yes, if the source is interlaced, because there is no deinterlacing anywhere in this pipeline. Most DVD and broadcast MPEG-2 is 480i or 576i, which stores two time-offset fields woven into each frame; a progressive web player displays both fields at once, which shows as horizontal combing on anything that moves. This converter does not fix that and will not silently try to. Deinterlace first with a desktop tool — a DVD ripper, HandBrake, or an FFmpeg deinterlace filter — and convert the progressive result here.

My widescreen DVD comes out with the wrong shape — what happened?

Anamorphic pixel aspect. A 16:9 DVD stores its picture in a 720×480 or 720×576 frame using non-square pixels, with the real display shape carried in a flag rather than in the pixel grid. Any resize on this page normalises the pixel aspect to square, which drops that flag and leaves the geometry wrong. The reliable fix is to state the shape explicitly: choose Width x Height under Video resolution and enter the display dimensions you want — roughly 854×480 for a 16:9 NTSC disc or 1024×576 for a 16:9 PAL disc — rather than using a percentage or a height preset.

Why is the WebM so much smaller than the MPEG-2?

Because the codecs are separated by a very long stretch of video-coding progress. MPEG-2 Part 2 was finalised in 1995 and predates H.264, let alone VP9. The gap shows up even in our own internal sizing model, which budgets around 0.05 bits per pixel for VP9 against 0.12 for VP8 — VP9 is expected to need well under half the bitrate of a codec that is itself far newer than MPEG-2. So DVD-era footage typically shrinks a lot at comparable visual quality, which is the main practical reason this conversion is worth doing.

Should I convert to WebM or to MP4?

Pick WebM when the target is the open web: it is royalty-free, plays inline across roughly 96% of browsers, and VP9 gives you the smaller file. Pick MPEG-2 to MP4 when you need the widest possible device and editor compatibility — older smart TVs, some hardware decoders and a number of editing applications still handle H.264 in MP4 more reliably than WebM. If you are building a web page, the belt-and-braces answer is both: serve WebM as the primary <source> with an MP4 fallback.

What happens to the audio from my DVD or broadcast capture?

It is re-encoded to Opus, the WebM default, and stays in sync. MPEG-2 sources normally carry AC-3 or MP2 at 48 kHz, and both are decoded and re-encoded — Opus operates natively at 48 kHz, so no resampling is needed for DVD-derived audio. One thing to watch on retail discs: there is no track picker, so when several audio streams exist the one with the most channels wins, meaning a 5.1 mix usually beats the stereo mix. There are no Audio Channel or Audio Sample Rate controls on a video page, so if you specifically need the stereo track, demux it first or extract the audio separately with MPEG-2 to OGG.

Should I use AV1 instead of VP9?

Only with a clear reason. AV1 gives smaller files than VP9 at the same quality and is available in the Video Codec list, but it encodes far more slowly and its decode support is narrower than VP9's — older phones, TVs and mid-range hardware may fall back to software decoding or fail outright. For a DVD-sourced standard-definition clip the absolute byte saving over VP9 is modest anyway, since the source resolution is small. VP9 remains the sensible default; reach for AV1 when file size genuinely dominates and you control the playback environment.

Why does Constant Quality do nothing when I switch to VP8?

Because VP8 is not a constant-rate-factor codec, even though the interface does not make that obvious. VP9 and AV1 accept a quality number on a 0–63 scale and act on it. VP8 uses quantizer bounds with a target bitrate instead — but the shared 16–63 slider still appears under Constant Quality when VP8 is selected, so it looks like a working control while the value goes nowhere. The encoder ends up falling back to its internal defaults and you lose control of the result. With VP8, stay on Quality Preset, or use Constraint Quality with a Max bitrate, or one of the bitrate modes. Better still, stay on VP9 unless something specifically requires VP8.

Is there a size limit, and what happens to my file?

There is no fixed per-file quota; with a long DVD capture the real constraint is upload size and time over your own connection. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — never watermarked, shared or made public, and no sign-up is required. If the finished WebM is still larger than you want, Compress WebM will take another pass at it.