diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
deleted file mode 100644
index a3b5cee..0000000
--- a/.github/workflows/build.yml
+++ /dev/null
@@ -1,43 +0,0 @@
-name: Build Electron App
-
-on:
-  push:
-    branches: [ main, master ]
-  workflow_dispatch:
-
-jobs:
-
-
-  build-macos:
-    runs-on: macos-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
-      
-      - name: Setup Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: '22'
-      
-      - name: Setup Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: '3.11'
-          
-      - name: Install dependencies
-        run: npm ci
-        
-      - name: Install app dependencies
-        run: npx electron-builder install-app-deps
-        
-      - name: Build macOS app
-        run: npm run build:mac
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        
-      - name: Upload macOS build
-        uses: actions/upload-artifact@v4
-        with:
-          name: macos-installer
-          path: release/**/*.dmg
-          retention-days: 30
\ No newline at end of file
diff --git a/src/components/video-editor/VideoEditor.tsx b/src/components/video-editor/VideoEditor.tsx
index 8b75b20..485fa6c 100644
--- a/src/components/video-editor/VideoEditor.tsx
+++ b/src/components/video-editor/VideoEditor.tsx
@@ -187,12 +187,21 @@ export default function VideoEditor() {
       const width = 1920;
       const height = 1080;
 
+      // Calculate visually lossless bitrate matching screen recording optimization
+      const totalPixels = width * height;
+      let bitrate = 30_000_000;
+      if (totalPixels > 1920 * 1080 && totalPixels <= 2560 * 1440) {
+        bitrate = 50_000_000;
+      } else if (totalPixels > 2560 * 1440) {
+        bitrate = 80_000_000;
+      }
+
       const exporter = new VideoExporter({
         videoUrl: videoPath,
         width,
         height,
         frameRate: 60,
-        bitrate: 15_000_000,
+        bitrate,
         codec: 'avc1.640033',
         wallpaper,
         zoomRegions,
diff --git a/src/hooks/useScreenRecorder.ts b/src/hooks/useScreenRecorder.ts
index 636f31d..23c141d 100644
--- a/src/hooks/useScreenRecorder.ts
+++ b/src/hooks/useScreenRecorder.ts
@@ -55,12 +55,18 @@ export function useScreenRecorder(): UseScreenRecorderReturn {
         return;
       }
       await window.electronAPI.startMouseTracking();
+      // Enable hardware acceleration and set optimal resolution/framerate constraints
       const mediaStream = await (navigator.mediaDevices as any).getUserMedia({
         audio: false,
         video: {
           mandatory: {
             chromeMediaSource: "desktop",
             chromeMediaSourceId: selectedSource.id,
+            minWidth: 1920,
+            minHeight: 1080,
+            maxWidth: 3840,
+            maxHeight: 2160,
+            frameRate: { ideal: 60, max: 60 }
           },
         },
       });
@@ -71,14 +77,21 @@ export function useScreenRecorder(): UseScreenRecorderReturn {
       const videoTrack = stream.current.getVideoTracks()[0];
       const { width = 1920, height = 1080 } = videoTrack.getSettings();
       const totalPixels = width * height;
-      let bitrate = 150_000_000;
+      // Use visually lossless bitrates optimized for quality and file size balance
+      let bitrate = 30_000_000;
       if (totalPixels > 1920 * 1080 && totalPixels <= 2560 * 1440) {
-        bitrate = 250_000_000;
+        bitrate = 50_000_000;
       } else if (totalPixels > 2560 * 1440) {
-        bitrate = 400_000_000;
+        bitrate = 80_000_000;
       }
       chunks.current = [];
-      const mimeType = "video/webm;codecs=vp9";
+      // Prefer AV1 codec for better compression, fallback to VP9 then VP8
+      const supportedCodecs = [
+        'video/webm;codecs=av1',
+        'video/webm;codecs=vp9',
+        'video/webm;codecs=vp8'
+      ];
+      const mimeType = supportedCodecs.find(codec => MediaRecorder.isTypeSupported(codec)) || 'video/webm;codecs=vp9';
       const recorder = new MediaRecorder(stream.current, { mimeType, videoBitsPerSecond: bitrate });
       mediaRecorder.current = recorder;
       recorder.ondataavailable = e => {
@@ -89,6 +102,8 @@ export function useScreenRecorder(): UseScreenRecorderReturn {
         if (chunks.current.length === 0) return;
         const duration = Date.now() - startTime.current;
         const buggyBlob = new Blob(chunks.current, { type: mimeType });
+        // Clear chunks early to free memory immediately after blob creation
+        chunks.current = [];
         const timestamp = Date.now();
         const videoFileName = `recording-${timestamp}.webm`;
         const trackingFileName = `recording-${timestamp}_tracking.json`;
@@ -110,7 +125,8 @@ export function useScreenRecorder(): UseScreenRecorderReturn {
         }
       };
       recorder.onerror = () => setRecording(false);
-      recorder.start(1000);
+      // Use larger timeslice to reduce recording overhead and improve smoothness
+      recorder.start(5000);
       startTime.current = Date.now();
       setRecording(true);
       window.electronAPI?.setRecordingState(true);
diff --git a/src/lib/exporter/videoExporter.ts b/src/lib/exporter/videoExporter.ts
index e299b69..c7f06ae 100644
--- a/src/lib/exporter/videoExporter.ts
+++ b/src/lib/exporter/videoExporter.ts
@@ -25,6 +25,7 @@ export class VideoExporter {
   private encodeQueue = 0;
   private readonly MAX_ENCODE_QUEUE = 60;
   private videoDescription: Uint8Array | undefined;
+  private videoColorSpace: VideoColorSpaceInit | undefined;
 
   constructor(config: VideoExporterConfig) {
     this.config = config;
@@ -164,13 +165,22 @@ export class VideoExporter {
         const chunk = this.encodedChunks[i];
         const meta: EncodedVideoChunkMetadata = {};
         
-        // Add decoder config for the first chunk
+        // Add decoder config with colorSpace metadata for the first chunk
         if (i === 0 && this.videoDescription) {
+          // Use captured colorSpace from encoder or fallback to default sRGB colorspace
+          const colorSpace = this.videoColorSpace || {
+            primaries: 'bt709',
+            transfer: 'iec61966-2-1',
+            matrix: 'rgb',
+            fullRange: true,
+          };
+          
           meta.decoderConfig = {
             codec: this.config.codec || 'avc1.640033',
             codedWidth: this.config.width,
             codedHeight: this.config.height,
             description: this.videoDescription,
+            colorSpace,
           };
         }
         
@@ -199,11 +209,16 @@ export class VideoExporter {
 
     this.encoder = new VideoEncoder({
       output: (chunk, meta) => {
+        // Capture decoder config metadata from encoder output
         if (meta?.decoderConfig?.description && !videoDescription) {
           const desc = meta.decoderConfig.description;
           videoDescription = new Uint8Array(desc instanceof ArrayBuffer ? desc : (desc as any));
           this.videoDescription = videoDescription;
         }
+        // Capture colorSpace from encoder metadata if provided
+        if (meta?.decoderConfig?.colorSpace && !this.videoColorSpace) {
+          this.videoColorSpace = meta.decoderConfig.colorSpace;
+        }
         this.encodedChunks.push(chunk);
         this.encodeQueue--;
       },
@@ -265,5 +280,6 @@ export class VideoExporter {
     this.encodedChunks = [];
     this.encodeQueue = 0;
     this.videoDescription = undefined;
+    this.videoColorSpace = undefined;
   }
 }