MPEG-2 to OGA Converter

MPEG-2 to OGA Converter

This extracts the soundtrack from an MPEG-2 program stream — a DVD rip, a broadcast capture, an old .mpg archive — and writes it into an Ogg container as an audio-only .oga file. The video is discarded. What makes .oga more interesting than most audio extensions is that it does not name a codec: Ogg is a container, and this page lets you choose Vorbis, Opus, Speex or FLAC to sit inside it. Vorbis is the preselected choice and is the right one for most people; the rest of this page explains when it is not, and where the sample-rate and bitrate controls behave differently than you would expect.

OGA Format at a Glance

Choosing the Codec Inside the .oga

How to Convert MPEG-2 to OGA

1. Upload Your MPEG-2 File: Drag the .mpeg2 file onto the page or click "+ Add Files". Several files can be queued and converted with the same settings.
2. Pick the Audio Codec: Vorbis is preselected; Opus, Speex and FLAC are the alternatives. This is the decision that determines what every other control below actually does.
3. Set the Bitrate, Channels and Sample Rate (Optional): Under File Compression choose Variable Bitrate, Constant Bitrate (8-384 kbps, with 128 kbps preselected), Custom Bitrate or Specific file size. Audio Channel offers Original, Mono or Stereo, and Audio Sample Rate offers whatever the chosen codec supports. Trim takes a Start time and Duration.
4. Convert and Download: Click Convert and save the .oga. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark.

Codec-Specific Behaviour Worth Knowing

• Vorbis and the 384K entry. Vorbis encodes by quality level rather than by target bitrate, and the Variable Bitrate list maps each entry from 48K to 320K onto one of those quality levels. The 384K entry sits above the top of that ladder, so selecting it drops out of quality mode and instead sets a fixed average bitrate of about 384 kbps. That is not wrong exactly, but it is a different kind of encode from the entries below it, and for lossy audio extracted from a DVD it is well past the point of diminishing returns. Pick 256K or 320K if you want the top of the quality range.
• Opus and 44100 Hz. Opus operates internally at 8, 12, 16, 24 or 48 kHz — 44.1 kHz is simply not one of its modes. The sample-rate dropdown still lists 44100 Hz, and choosing it does not fail: the request is converted to 48 kHz before encoding. If you want to be explicit, select 48000 Hz or leave the control on "Original".
• Speex is a voice codec. Selecting Speex removes "Original" from the sample-rate list entirely, leaving only 8000 and 16000 Hz. Everything above roughly 4 or 8 kHz of audio bandwidth is therefore discarded. That is exactly right for a narrowband voice memo and completely wrong for music, dialogue you care about, or anything with a score under it.
• FLAC ignores the bitrate you set. FLAC reproduces the decoded input bit for bit, so its file size is decided by the content, not by a bitrate you choose. The bitrate controls stay on screen when you select it, and there is no compression-level slider on this page. If you want a lossless copy with that level of control, use the dedicated MPEG-2 to FLAC target instead.

Frequently Asked Questions

What is the difference between .oga and .ogg?

They are the same Ogg container with different naming conventions. RFC 5334, which registered the Ogg media types, makes .oga the general-purpose extension for an Ogg file whose content is predominantly audio, and reserves .ogg for backward compatibility with files containing only a Vorbis bitstream. In practice .ogg remains far more widely recognised by software, so if a player rejects your .oga the first thing to try is renaming it — the bytes are the same. Our MPEG-2 to OGG page writes the other spelling directly.

Which codec should I choose if I just want the DVD soundtrack?

Vorbis, which is already selected. It is efficient on music and mixed film audio, it is the most widely supported codec inside Ogg, and it matches what most software expects to find in an Ogg audio file. Opus is a better choice if the material is mostly speech or you are targeting low bitrates, and FLAC if this is an archive copy you do not want to degrade further. Speex is only appropriate for narrowband voice.

Will converting to OGA improve the audio from my DVD?

No. MPEG-2 program streams from DVD and broadcast carry MPEG-1 Layer II or Dolby AC-3 audio, both of which are lossy — information was discarded when the disc or broadcast was made. Encoding that to Vorbis or Opus is a second lossy pass, which at a sensible bitrate is close to transparent but never additive. Choosing FLAC avoids adding a second generation of loss, but it preserves the already-lossy source exactly; it does not restore anything.

What bitrate is enough for Vorbis?

For a DVD soundtrack, the 128K to 192K entries are the usual sweet spot and 256K is comfortably beyond what most listeners can distinguish from the source. Because Vorbis works in quality mode, those entries describe a target quality rather than a hard rate — quiet passages use fewer bits and busy ones use more. Only go higher if you are working from unusually clean source audio, and stay at 320K or below to remain on the quality ladder.

Why does my Opus file come out at 48 kHz when I asked for 44100?

Because Opus does not have a 44.1 kHz mode. The codec is defined for 8, 12, 16, 24 and 48 kHz internally, so a 44100 Hz request cannot be honoured literally. Rather than refusing the conversion, our pipeline converts the request to 48000 Hz and encodes normally. The audible difference is nil; the only practical consequence is that a tool inspecting the file will report 48 kHz.

Can I get 5.1 surround into the .oga?

The container and Vorbis both support multichannel audio, but be aware of which track gets picked. This page has no track selector, so when a DVD program stream carries both a 5.1 mix and a stereo mix, the converter takes the stream with the most channels — the surround one — and breaks ties by lowest stream index. If you want a predictable two-channel result instead, set Audio Channel to Stereo, which downmixes rather than leaving the channel layout to chance.

What plays .oga files?

VLC, foobar2000, mpv, Audacious and most Linux desktop players handle them natively, as do Firefox and Chromium-based browsers. Safari support arrived later: Apple added Opus and Vorbis in Ogg containers in Safari 18.4 (macOS 15.4, iOS 18.4 and iPadOS 18.4). Hardware is the weak point — car stereos, older iPods and many standalone players have no Ogg support at all. When maximum compatibility matters more than open formats, MPEG-2 to MP3 is the safer target.

Can I extract just one song or scene instead of the whole soundtrack?

Yes. The Trim control takes a Start time and a Duration, entered in seconds or as HH:MM:SS.sss, and only that span is encoded. Do the trimming here rather than afterwards if you can — Audio Cutter does not accept video files, so cutting before conversion means using Video Cutter on the MPEG-2 source, which is a slower route for a long capture.

What happens to my file after conversion?

The MPEG-2 upload and the resulting .oga are both deleted automatically after a few hours. Transfers use an encrypted connection and the conversion runs on our servers; there is no account to create, nothing is watermarked, and files are never shared or made public. If the result is still larger than you need, the Audio Compressor can shrink it further without going back to the source video.