video Format

WebM File Format

WebM is Google’s royalty-free open media container format designed for the web. It couples VP8/VP9 video with Vorbis/Opus audio for high-efficiency HTML5 video.

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Technical Specifications

Extensions	.webm
MIME Types	video/webm
Category	Video
Engine Tier	tier2-wasm
Magic Bytes / Sniffing	0x1A 0x45 0xDF 0xA3
Opens With	All modern web browsers, VLC, YouTube
Good For	High-performance HTML5 browser video, web streaming, and alpha video.
Not Recommended For	Playback on older consumer standalone electronics.

Convert from WebM (3 targets)

WebMMP4(high)WebMGIF(good)WebMMP3(high)

Convert to WebM (2 sources)

MP4WebM(high)MKVWebM(high)