I am currently working on developing two applications for screen sharing within a LAN setting using Electron, React, and TypeScript. The first app will capture the screen stream and broadcast it via UDP, while the second app, running on multiple devices, will receive the stream and display it. I have explored the desktopCapturer API provided by Electron, but encountered an error when attempting to run this code snippet:
desktopCapturer
.getSources({ types: ["window", "screen"] })
.then(async (sources) => {
for (const source of sources) {
if (source.name === "Entire Screen") {
const displayMediaOptions = {
video: {
cursor: "always",
mandatory: {
chromeMediaSource: "desktop",
chromeMediaSourceId: source.id,
maxWidth: 800,
maxHeight: 700,
},
},
audio: false,
};
try {
const stream = await navigator.mediaDevices.getUserMedia(
displayMediaOptions
);
handleStream(stream);
} catch (e) {
handleError(e);
}
return;
}
}
});
The specific error message is as follows:
Argument of type '{ video: { cursor: string; mandatory: { chromeMediaSource: string; chromeMediaSourceId: string; maxWidth: number; maxHeight: number; }; }; audio: boolean; }' is not assignable to parameter of type 'MediaStreamConstraints'.
Types of property 'video' are incompatible.
Type '{ cursor: string; mandatory: { chromeMediaSource: string; chromeMediaSourceId: string; maxWidth: number; maxHeight: number; }; }' is not assignable to type 'boolean | MediaTrackConstraints'.
Type '{ cursor: string; mandatory: { chromeMediaSource: string; chromeMediaSourceId: string; maxWidth: number; maxHeight: number; }; }' has no properties in common with type 'MediaTrackConstraints'.ts(2345)
Upon further investigation, I discovered that the MediaTrackConstraints does not support the mandatory property. Additionally, I learned about WebRTC as a potential solution, but I am unsure if it can function in a LAN environment without external server support.
Therefore, I am seeking advice on any possible workarounds for this issue or alternative technologies that could be utilized for screen sharing within a local network?