WPT
wpt / media-source / mse-for-webcodecs / tentative / mediasource-webcodecs-addsourcebuffer.html
Spec: Media Source Extensions™ ↗
Runs: Chrome 155.0.8042.0 (wpt@4eb09bcd9, 2026-09-04) | Firefox 157.0a1 (wpt@c3fcbf4ba, 2026-09-04) | Safari 251 preview (wpt@e7122b73f, 2026-09-04) | Ladybird 1.0-52f0f (wpt@a1ecd0c09, 2026-09-04) | Servo Servo 0.6 (wpt@2c385f65e, 2026-09-04) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)
View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi
| Chrome | Firefox | Safari | Ladybird | Servo | Blitz | |
|---|---|---|---|---|---|---|
| Total | 24/24 | 0/24 | 0/24 | 0/24 | 0/24 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| addSourceBuffer call with invalid argument null while MediaSource readyState is closed | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument undefined while MediaSource readyState is closed | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument { empty dictionary } while MediaSource readyState is closed | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument { valid audioConfig and videoConfig } while MediaSource readyState is closed | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument audio config missing required member "codec" while MediaSource readyState is closed | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument video config missing required member "codec" while MediaSource readyState is closed | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument null while MediaSource readyState is open | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument undefined while MediaSource readyState is open | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument { empty dictionary } while MediaSource readyState is open | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument { valid audioConfig and videoConfig } while MediaSource readyState is open | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument audio config missing required member "codec" while MediaSource readyState is open | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument video config missing required member "codec" while MediaSource readyState is open | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument null while MediaSource readyState is ended | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument undefined while MediaSource readyState is ended | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument { empty dictionary } while MediaSource readyState is ended | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument { valid audioConfig and videoConfig } while MediaSource readyState is ended | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument audio config missing required member "codec" while MediaSource readyState is ended | PASS | — | — | — | — | — |
| addSourceBuffer call with invalid argument video config missing required member "codec" while MediaSource readyState is ended | PASS | — | — | — | — | — |
| addSourceBuffer call with valid argument valid audioConfig while MediaSource readyState is closed | PASS | — | — | — | — | — |
| addSourceBuffer call with valid argument valid videoConfig while MediaSource readyState is closed | PASS | — | — | — | — | — |
| addSourceBuffer call with valid argument valid audioConfig while MediaSource readyState is open | PASS | — | — | — | — | — |
| addSourceBuffer call with valid argument valid videoConfig while MediaSource readyState is open | PASS | — | — | — | — | — |
| addSourceBuffer call with valid argument valid audioConfig while MediaSource readyState is ended | PASS | — | — | — | — | — |
| addSourceBuffer call with valid argument valid videoConfig while MediaSource readyState is ended | PASS | — | — | — | — | — |