MPG files use MPEG-1/MPEG-2 video with MP2 audio — codecs from the VCD and DVD era that are poorly supported on the modern web. WebM is Google's open, royalty-free video format using VP8/VP9 video and Vorbis/Opus audio, designed specifically for HTML5 web video. Converting MPG to WebM brings legacy disc and broadcast content to the web with modern compression efficiency and native browser playback.

WebM is natively supported by Chrome, Firefox, Edge, and Opera for seamless HTML5 video playback without plugins. VP9 offers compression efficiency roughly 30-50% better than MPEG-2, meaning MPG content can be served at significantly lower bandwidth while maintaining equivalent visual quality. For web publishers with legacy MPG content, WebM conversion enables efficient, universal web delivery.

FFmpeg decodes MPEG-1/2 video (deinterlacing if needed) and MP2 audio, then re-encodes using libvpx-vp9 for video and libopus for audio. VP9 two-pass encoding provides the best quality-to-size ratio. CRF (constant rate factor) mode with CRF 31-33 produces good 1080p quality. The output uses the WebM (Matroska subset) container with cues at the beginning for instant seeking in web players.

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

VP9 achieves comparable quality at roughly 40-60% of the MPEG-2 bitrate. A 4 GB DVD rip might become 1.5-2.5 GB in WebM VP9.

Safari 14.1+ (macOS Big Sur, iOS 15) supports VP9/WebM. Older Safari versions do not — provide MP4 fallback for maximum compatibility.

VP9 for all modern use cases. VP9 offers roughly 50% better compression than VP8. Use VP8 only if targeting very old browsers.

VP9 encoding is 3-5x more computationally intensive than H.264. Two-pass mode doubles encoding time but significantly improves quality. This is a one-time cost for permanent bandwidth savings.

WebM is progressive-scan only. Interlaced MPG sources must be deinterlaced during conversion, which the conversion tool handles automatically.

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

Fitur	MPG	WebM
Nama Lengkap	MPEG Video	WebM Video
Ekstensi	.mpg	.webm
Terbaik Untuk	Universal support	Web optimized

Convert MPG to WebM — Free Online Converter

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MPG vs WebM