w3c/webcodecs

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WebCodecs is a flexible web API for encoding and decoding audio and video.

Stars: 1.3k
Forks: 194
Open beginner issues: 0
Indexed issues: 135
Avg merge: 1d 13h
Merged PRs (30d): 3

Dominant language: HTML
License: No license data
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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135 open issues indexed

Support Serialization with forStorage=true Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#291 · 2 comments · Opened Jul 6, 2021
Close and transfer (buffer stealing) Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#287 · 3 comments · Opened Jun 23, 2021
Reference frame control Open

extension RTC TPAC2024

w3c/webcodecs#285 · 16 comments · 1 assignee · Opened Jun 17, 2021
Configure lossless encoding Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#258 · 3 comments · Opened May 26, 2021
Add seeking example to explainer / samples Open

editorial

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

w3c/webcodecs#257 · 6 comments · Opened May 25, 2021
Need EncodedChunk to have video metadata to support WebRTC Open

CR Blocking TPAC2024

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/webcodecs#245 · 9 comments · Opened May 12, 2021
Clarify format of `new VideoFrame(CanvasImageSource)` Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#243 · 2 comments · Opened May 11, 2021
Fingerprinting section could be improved Open

editorial privacy-tracker

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#238 · 3 comments · Opened May 11, 2021
Timing attack privacy consideration Open

editorial privacy-needs-resolution

Difficulty 5/5 Over a week Newbie friendliness 20/100

w3c/webcodecs#234 · 2 comments · Opened May 6, 2021
Suggestions on improvements for the privacy considerations section Open

editorial privacy-needs-resolution

Difficulty 5/5 Over a week Newbie friendliness 22/100

w3c/webcodecs#233 · 1 comment · Opened May 6, 2021
Output of decoding and encoding bytes are fingerprintable Open

editorial obsolete privacy-needs-resolution

Difficulty 4/5 3-5 days Newbie friendliness 25/100

w3c/webcodecs#231 · 3 comments · Opened May 6, 2021
Add origin clean check on objects that support it. Open

editorial privacy-needs-resolution

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

w3c/webcodecs#230 · 2 comments · Opened May 6, 2021
Improve memory locality for higher performances and reduced memory working set Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#212 · 15 comments · 1 reaction · Opened May 3, 2021
Allowing decoupling of decoding and demuxing for images Open

extension image

Difficulty 5/5 Over a week Newbie friendliness 20/100

w3c/webcodecs#205 · 23 comments · 1 reaction · Opened Apr 29, 2021
CMYK jpeg handling Open

extension image

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#203 · 5 comments · 1 reaction · Opened Apr 29, 2021
Metadata access when decoding images Open

extension image

Difficulty 5/5 Over a week Newbie friendliness 22/100

w3c/webcodecs#201 · 2 comments · 2 reactions · Opened Apr 29, 2021
Alpha support Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#200 · 12 comments · 3 reactions · Opened Apr 29, 2021
Emit metadata (SPS,VUI,SEI,...) during decoding Open

extension

Difficulty 5/5 Over a week Newbie friendliness 20/100

w3c/webcodecs#198 · 8 comments · 1 reaction · Opened Apr 28, 2021
WebCodec as pass through to application metadata Open

CR Blocking extension TPAC 2022 TPAC2024

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#189 · 11 comments · Opened Apr 22, 2021
Offer resampling of decoded audio Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#178 · 4 comments · 2 reactions · Opened Apr 9, 2021
Add hardware acceleration preference to AudioDecoderConfig Open

extension

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

w3c/webcodecs#177 · 3 comments · Opened Apr 9, 2021
Output trimming for future BYOB Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#176 · 2 comments · Opened Apr 9, 2021
Sniffing considerations Open

extension image

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#169 · 12 comments · Opened Apr 6, 2021
Add definitions / diagrams for subtle video frame concepts Open

editorial need-definition

w3c/webcodecs#166 · 5 comments · 2 reactions · 1 assignee · Opened Apr 5, 2021
[[active encoder config]] may be incorrect when running the Output EncodedVideoChunk algorithm. Open

editorial

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#138 · 1 comment · Opened Feb 10, 2021
Improve reset algorithm clarity Open

editorial

w3c/webcodecs#128 · 1 comment · 1 assignee · Opened Feb 1, 2021
"Presentation timestamp" is not defined in spec Open

CR Blocking Ready for PR

w3c/webcodecs#107 · 11 comments · 1 assignee · Opened Dec 4, 2020
Detach codec inputs (where feasible) Open

extension PR exists tag-tracker

w3c/webcodecs#104 · 16 comments · 1 assignee · Opened Nov 9, 2020
Provide introspection for VideoFrame types Open

extension obsolete

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#67 · 5 comments · Opened Jul 28, 2020
Consider Blob for access to raw buffers Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#65 · 5 comments · Opened Jun 19, 2020
Add an example demonstrating media editing scenarios Open

Question

Difficulty 4/5 3-5 days Newbie friendliness 25/100

w3c/webcodecs#62 · 11 comments · 6 reactions · Opened May 29, 2020
Latency and bidirectionally predicted frames in VideoEncoder. Open

extension research tuning-parameter

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/webcodecs#57 · 4 comments · Opened May 11, 2020
Simulcast support Open

extension

Difficulty 5/5 Over a week Newbie friendliness 20/100

w3c/webcodecs#44 · 8 comments · Opened Feb 24, 2020
Support for content protection Open

extension

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#41 · 35 comments · Opened Feb 12, 2020
WebGL access to decoded planes Open

extension obsolete

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webcodecs#37 · 17 comments · Opened Jan 30, 2020

w3c/webcodecs

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