MPG uses MPEG-1/MPEG-2 video with MP2 audio — the codecs that powered Video CDs and DVDs — while OGV (Ogg Video) is the completely royalty-free video format using Theora video and Vorbis audio. OGV was created by the Xiph.Org Foundation as an open alternative to patent-encumbered formats. Converting MPG to OGV replaces MPEG's patented codecs with entirely free alternatives, producing video that can be distributed, modified, and played without any licensing obligations.

OGV serves organizations and projects that mandate use of patent-free software and formats. Government agencies, educational institutions, open-source projects, and Wikimedia Commons require royalty-free video. Converting MPG to OGV enables distribution of legacy broadcast and disc content through these channels without patent concerns.

FFmpeg decodes MPEG-1/2 video and MP2 audio from the MPG, deinterlaces if needed, and re-encodes using libtheora (video) and libvorbis (audio) into the Ogg container. Theora quality levels range from 0-10, with 5-7 producing reasonable results for standard-definition content. Theora is significantly less efficient than H.264 — expect files 30-60% larger at equivalent visual quality.

Resolution: 1920x1080

Bitrate: 8-12 Mbps

H.264 recommended for fast processing

Resolution: 1080x1080

Bitrate: 3.5 Mbps

Square or 9:16 for Reels

Resolution: 1080x1920

Bitrate: 4 Mbps

9:16 vertical, under 60s ideal

Resolution: 1280x720

Bitrate: 5 Mbps

Under 140s, 512MB max

Resolution: 960x540

Bitrate: 2 Mbps

16MB limit for standard, 64MB for document

Resolution: 1280x720

Bitrate: 4 Mbps

8MB free, 50MB Nitro

They are roughly comparable at similar bitrates. This makes MPG-to-OGV conversion more even in quality than, say, H.264-to-Theora where H.264 has a clear advantage.

WebM (VP9) is more efficient than OGV (Theora) but both are patent-free. WebM is the better choice for new projects; OGV has wider legacy browser support.

Yes. OGV (Theora+Vorbis) is one of the accepted video formats on Wikimedia Commons, along with WebM.

Quality 6-7 for standard-definition DVD content. Quality 8-9 for HD broadcast sources. Higher levels produce diminishing returns in quality improvement.

Firefox, Chrome, and Edge support OGV. Safari does not. For universal web playback, provide both OGV and MP4.

Device	MPG	OGV
Windows PC	Partial	Partial
macOS	Partial	Partial
iPhone/iPad	Partial	Partial
Android	Partial	Partial
Linux	Partial	Partial
Web Browser	No	No

Egenskap	MPG	OGV
Fullt navn	MPEG Video	Ogg Video
Filendelse	.mpg	.ogv
Best egnet for	Universal support	Open source

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