OGG vs RMVB
A detailed comparison of OGG Vorbis Audio and RealMedia VBR — file size, quality, compatibility, and which format to choose for your workflow.
OGG Vorbis Audio
Audio FilesOGG Vorbis is an open-source, royalty-free lossy audio format. It generally offers better quality than MP3 at equivalent bitrates and is commonly used in gaming, open-source software, and web audio.
About OGG filesRealMedia VBR
Video FilesRMVB (RealMedia Variable Bitrate) is a variable bitrate extension of the RealMedia container. It was popular for distributing video content in Asian markets due to its efficient compression at low bitrates.
About RMVB filesStrengths Comparison
OGG Strengths
- Completely royalty-free — no patent worries for encoders or decoders.
- Container is streaming-friendly — useful for internet radio.
- Native support in HTML5 <audio>, every major Linux distro, and most audio tools.
- Can multiplex any number of tracks (audio, video, text) in one file.
- Mature tooling via libvorbis, libopus, and FFmpeg.
RMVB Strengths
- Better quality-at-bitrate than fixed RealMedia.
- Still playable in modern open-source players (VLC, mpv).
- Cultural archive value for 2000s Asian internet video.
Limitations
OGG Limitations
- Apple and Microsoft avoided Ogg historically — iOS and Safari only added Opus support recently.
- Hardware decoder support is rare — encoding for battery-constrained devices (phones) still favors AAC.
- Confusing naming: ".ogg" could be Vorbis, Opus, Speex, or FLAC.
- Metadata conventions (Vorbis comments) are simpler than MP4's tagging.
RMVB Limitations
- Tied to the dead RealNetworks ecosystem.
- H.264 is objectively better at equal bitrates.
- No modern encoder — content is archival only.
- Obscure format outside Asian regional archives.
Technical Specifications
| Specification | OGG | RMVB |
|---|---|---|
| MIME types | audio/ogg, application/ogg | — |
| Extensions | .ogg (audio), .oga, .ogv (video), .ogx (app), .opus | — |
| Standard | RFC 3533 (container), RFC 5334 (MIME) | — |
| Codecs | Vorbis, Opus, Speex, FLAC, Theora (video), Dirac | RealVideo 9/10 (variable bitrate) |
| Streaming | Native (page-based structure) | — |
| MIME type | — | application/vnd.rn-realmedia-vbr |
| Extension | — | .rmvb |
| Audio | — | RealAudio Cook |
| Successor ecosystem | — | H.264 MP4 / MKV |
Typical File Sizes
OGG
- 3-min music (Vorbis q5 / ~160 kbps) 3.5 MB
- 1-hour podcast (Vorbis q3) 45 MB
- Game sound effects (Vorbis q2) 5-30 KB each
RMVB
- 45-min TV episode 150-350 MB
- 2-hour movie 300-800 MB
Ready to convert?
Convert between OGG and RMVB online, free, and without installing anything. Encrypted upload, automatic deletion after 60 minutes.
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Frequently Asked Questions
OGG is an open-source multimedia container format developed by the Xiph.Org Foundation. It most commonly holds Vorbis audio (for music) or Opus audio (for voice), offering good quality at lower bitrates than MP3.
RMVB (RealMedia VBR) is a video container format that bundles one or more video streams, audio tracks, and optional subtitles into a single file. The container format determines how metadata is organised and which codecs can live inside; the visual quality itself depends on the codec (H.264, H.265, VP9, AV1) rather than the RMVB wrapper. It is part of the video files family.
OGG files play in VLC, Firefox, Chrome, foobar2000, and Audacity. Android supports OGG natively. On iOS and iTunes, you may need to convert to a supported format like MP3 or AAC.
VLC, MPV and PotPlayer play nearly every RMVB file on desktop. Browser support varies: modern Chromium, Firefox and Safari play common containers via the HTML5 <video> tag, but niche RMVB variants may fail. If a device refuses your RMVB, convert to MP4 with our RMVB to MP4 converter for universal playback.
OGG Vorbis delivers better audio quality at the same bitrate compared to MP3. However, MP3 has universal device support. Use OGG in open-source projects and games. Convert to MP3 when maximum compatibility is needed.
Upload your RMVB to KaijuConverter and pick MP4, MOV, MKV, WebM, or any other target. Our pipeline uses FFmpeg under the hood and stream-copies when codecs are compatible (no quality loss) or transcodes at high-quality defaults otherwise. Conversion runs server-side; both files delete within two hours.