Improve screenshare performance

electron/app/flags.ts

@@ -2,26 +2,56 @@ import { app } from 'electron';
 import { readDesktopSettings } from '../desktop-settings';
 
 export function configureAppFlags(): void {
+  linuxSpecificFlags();
+  audioFlags();
+  networkFlags();
+  setupGpuEncodingFlags();
+  chromiumFlags();
+}
+
+function chromiumFlags(): void {
+  // Allow media autoplay without user gesture
+  app.commandLine.appendSwitch('autoplay-policy', 'no-user-gesture-required');
+
+  // Suppress Autofill devtools errors
+  app.commandLine.appendSwitch('disable-features', 'Autofill,AutofillAssistant,AutofillServerCommunication');
+}
+
+function audioFlags(): void {
+  if (process.platform === 'linux') {
+    // Use the new PipeWire-based audio pipeline on Linux for better screen share audio capture support
+    app.commandLine.appendSwitch('enable-features', 'AudioServiceOutOfProcess');
+  }
+}
+
+function linuxSpecificFlags(): void {
+  // Disable sandbox on Linux to avoid SUID / /tmp shared-memory issues
+  if (process.platform === 'linux') {
+    app.commandLine.appendSwitch('no-sandbox');
+    app.commandLine.appendSwitch('disable-dev-shm-usage');
+  }
+}
+
+function networkFlags(): void {
+  // Accept self-signed certificates in development (for --ssl dev server)
+  if (process.env['SSL'] === 'true') {
+    app.commandLine.appendSwitch('ignore-certificate-errors');
+  }
+}
+
+function setupGpuEncodingFlags(): void {
   const desktopSettings = readDesktopSettings();
 
   if (!desktopSettings.hardwareAcceleration) {
     app.disableHardwareAcceleration();
   }
 
-  // Disable sandbox on Linux to avoid SUID / /tmp shared-memory issues
-  if (process.platform === 'linux') {
-    app.commandLine.appendSwitch('no-sandbox');
-    app.commandLine.appendSwitch('disable-dev-shm-usage');
-    app.commandLine.appendSwitch('enable-features', 'AudioServiceOutOfProcess');
+  if (process.platform === 'linux' && desktopSettings.vaapiVideoEncode) {
+    // Enable VA-API hardware video encoding on Linux
+    app.commandLine.appendSwitch('enable-features', 'VaapiVideoEncode');
   }
 
-  // Suppress Autofill devtools errors
-  app.commandLine.appendSwitch('disable-features', 'Autofill,AutofillAssistant,AutofillServerCommunication');
-  // Allow media autoplay without user gesture
-  app.commandLine.appendSwitch('autoplay-policy', 'no-user-gesture-required');
-
-  // Accept self-signed certificates in development (for --ssl dev server)
-  if (process.env['SSL'] === 'true') {
-    app.commandLine.appendSwitch('ignore-certificate-errors');
-  }
+  app.commandLine.appendSwitch('enable-gpu-rasterization');
+  app.commandLine.appendSwitch('enable-zero-copy');
+  app.commandLine.appendSwitch('enable-native-gpu-memory-buffers');
 }

electron/desktop-settings.ts

@@ -4,6 +4,7 @@ import * as path from 'path';
 
 export interface DesktopSettings {
   hardwareAcceleration: boolean;
+  vaapiVideoEncode: boolean;
 }
 
 export interface DesktopSettingsSnapshot extends DesktopSettings {
@@ -12,7 +13,8 @@ export interface DesktopSettingsSnapshot extends DesktopSettings {
 }
 
 const DEFAULT_DESKTOP_SETTINGS: DesktopSettings = {
-  hardwareAcceleration: true
+  hardwareAcceleration: true,
+  vaapiVideoEncode: false
 };
 
 export function getDesktopSettingsSnapshot(): DesktopSettingsSnapshot {
@@ -38,6 +40,9 @@ export function readDesktopSettings(): DesktopSettings {
     const parsed = JSON.parse(raw) as Partial<DesktopSettings>;
 
     return {
+      vaapiVideoEncode: typeof parsed.vaapiVideoEncode === 'boolean'
+        ? parsed.vaapiVideoEncode
+        : DEFAULT_DESKTOP_SETTINGS.vaapiVideoEncode,
       hardwareAcceleration: typeof parsed.hardwareAcceleration === 'boolean'
         ? parsed.hardwareAcceleration
         : DEFAULT_DESKTOP_SETTINGS.hardwareAcceleration