D136+: 修复xfade cut过渡duration=0导致只输出第一镜 — 改为0.01

video-ai-system/engines/video-editor.js

@@ -226,7 +226,7 @@ function composeXFadeChain(shots, output, fps) {
   const inputs = shots.map((s, i) => `-i "${s.file}"`).join(' ');
 
   for (let i = 1; i < shots.length; i++) {
-    const fadeDur = shots[i].transition === 'cut' ? 0 : 0.3;
+    const fadeDur = shots[i].transition === 'cut' ? 0.01 : 0.3;
     const offset = (accumDur - fadeDur).toFixed(2);
     const label = i < shots.length - 1 ? `v${i}` : 'vout';
     filter += `[${prev}][${i}:v]xfade=transition=fade:duration=${fadeDur}:offset=${offset}[${label}];\n`;