> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes. # PlatformCapabilities > Browser/platform WebRTC capability flags. Browser/platform WebRTC capability flags. ## **Properties** **`audioCodecs`** `readonly string[]` — required List of supported audio codecs. --- **`audioOutputSelection`** `boolean` — required Whether setSinkId (audio output selection) is supported. --- **`getDisplayMedia`** `boolean` — required Whether getDisplayMedia is available. --- **`getUserMedia`** `boolean` — required Whether getUserMedia is available. --- **`insertableStreams`** `boolean` — required Whether insertable streams / encoded transforms are available. --- **`screenShare`** `boolean` — required Whether screen sharing is supported. --- **`screenShareAudio`** `boolean` — required Whether screen share can include system audio (Chrome-only). --- **`simulcast`** `boolean` — required Whether simulcast is supported. --- **`videoCodecs`** `readonly string[]` — required List of supported video codecs. --- **`webrtc`** `boolean` — required Whether the browser supports WebRTC at all. --- > Browser/platform WebRTC capability flags.