fix: setExtractionOptions 改为 nbSamples: Infinity，提取全部样本

apps/web/src/pages/generate/hooks/useCanvasPlayer.ts

@@ -352,7 +352,7 @@ export function useCanvasPlayer(
 
           // 提取所有 samples
           mp4File.setExtractionOptions(videoTrack.id ?? 1, null, {
-            nbSamples: videoTrack.nb_samples || 10000,
+            nbSamples: Infinity, // 提取所有 sample
           })
           mp4File.start()
         }