Definition
WebRTC Encoded Transform defines SFrameEncrypterStream
[Exposed=(Window,DedicatedWorker)]
interface SFrameEncrypterStream : EventTarget {
    constructor(optional SFrameTransformOptions options = {});
};
SFrameEncrypterStream includes GenericTransformStream;
SFrameEncrypterStream includes SFrameKeyManagement;Consolidated IDL (across mixin and partials)
[Exposed=(Window,DedicatedWorker)]
interface SFrameEncrypterStream : EventTarget {
    constructor(optional SFrameTransformOptions options = {});
  readonly attribute ReadableStream readable;
  readonly attribute WritableStream writable;
    Promise<undefined> setEncryptionKey(CryptoKey key, optional CryptoKeyID keyID);
    attribute EventHandler onerror;
};