Webcodecs in Node.js

@napi-rs/webcodecs

• W3C WebCodecs API compliant - Full implementation of the WebCodecs specification with native DOMException errors
• Video encoding/decoding - H.264, H.265, VP8, VP9, AV1
• Audio encoding/decoding - AAC, Opus, MP3, FLAC, Vorbis, PCM variants
• Image decoding - JPEG, PNG, WebP, GIF, BMP, AVIF
• Canvas integration - Create VideoFrames from @napi-rs/canvas for graphics and text rendering
• Hardware acceleration - Zero-copy GPU encoding with VideoToolbox (macOS), NVENC (NVIDIA), VAAPI (Linux), QSV (Intel)
• Cross-platform - macOS, Windows, Linux (glibc/musl, x64/arm64/armv7)

Supported Codecs

Video

Codec	Codec String	Encoding	Decoding
H.264	avc1.*	✅	✅
H.265	hev1.*, hvc1.*	✅	✅
VP8	vp8	✅	✅
VP9	vp09.*, vp9	✅	✅
AV1	av01.*, av01, av1	✅	✅

Note: Short form codec strings (vp9, av01, av1) are accepted for compatibility with browser implementations.

Audio

Codec	Codec String	Encoding	Decoding
AAC	mp4a.40.2	✅	✅
Opus	opus	✅	✅
MP3	mp3	✅	✅
FLAC	flac	✅	✅
Vorbis	vorbis	❌	✅
PCM	pcm-*	❌	✅

Image

Format	MIME Type	Decoding
JPEG	image/jpeg	✅
PNG	image/png	✅
WebP	image/webp	✅
GIF	image/gif	✅
BMP	image/bmp	✅
AVIF	image/avif	✅

Platform Support

Pre-built binaries are available for:

Platform	Architecture
macOS	x64, arm64
Windows	x64, arm64
Linux (glibc)	x64, arm64
Linux (musl)	x64, arm64
Linux (glibc, gnueabihf)	armv7