11

scripts/nodejs/subtitle_bgm_generate.js

@@ -18,6 +18,7 @@ const {
   normalizeDisplayText,
   stripKeywordsFromDisplay,
   filterMatchesForRecord,
+  isInlineKeywordRenderMode,
 } = require("./subtitle_keyword_drawtext.js");
 
 const OUTPUT_DIR = path.join(os.tmpdir(), "aiclient-subtitle-bgm");
@@ -474,7 +475,81 @@ function resolveAssLayout(position, videoHeight) {
   return { alignment: 2, marginL: 120, marginR: 120, marginV };
 }
 
-function buildAssContent(records, styleInput, videoWidth, videoHeight, keywordMatches = []) {
+function wrapAssKeywordInline(text, style, baseFontSize) {
+  const primary = hexToAssColor(style.fontColor);
+  const outline = hexToAssColor(style.outlineColor);
+  const bord = Math.max(0, Math.round(Number(style.outlineWidth) || 3));
+  const fs =
+    style.fontSize > 0
+      ? Math.round(Number(style.fontSize))
+      : Math.round(baseFontSize * 1.12);
+  const inner = assEscapeText(text);
+  return `{\\c${primary}\\3c${outline}\\bord${bord}\\fs${fs}}${inner}{\\r}`;
+}
+
+function buildInlineAssLine(lineText, lineMatches, baseFontSize) {
+  if (!lineMatches.length) return assEscapeText(lineText);
+  const sorted = [...lineMatches].sort(
+    (a, b) => a.occurrenceStart - b.occurrenceStart,
+  );
+  let out = "";
+  let pos = 0;
+  for (const m of sorted) {
+    const start = Math.max(0, m.occurrenceStart);
+    const end = Math.min(lineText.length, m.occurrenceEnd);
+    if (end <= start || start < pos) continue;
+    if (start > pos) {
+      out += assEscapeText(lineText.slice(pos, start));
+    }
+    out += wrapAssKeywordInline(
+      lineText.slice(start, end),
+      m.style || {},
+      baseFontSize,
+    );
+    pos = end;
+  }
+  if (pos < lineText.length) out += assEscapeText(lineText.slice(pos));
+  return out;
+}
+
+/**
+ * 在 ASS 正文内联高亮关键词（保持换行与字序，对齐 Electron inline-emphasis）
+ */
+function buildInlineAssTextForRecord(
+  displayText,
+  segMatches,
+  maxCharsPerLine,
+  baseFontSize,
+) {
+  const plain = String(displayText || "").trim();
+  if (!plain) return assEscapeText(" ");
+  const lines = smartLineBreak(plain, maxCharsPerLine);
+  let charOffset = 0;
+  const assLines = lines.map((line) => {
+    const lineStart = charOffset;
+    const lineEnd = charOffset + line.length;
+    const lineMatches = segMatches
+      .filter((m) => m.occurrenceStart < lineEnd && m.occurrenceEnd > lineStart)
+      .map((m) => ({
+        ...m,
+        occurrenceStart: Math.max(0, m.occurrenceStart - lineStart),
+        occurrenceEnd: Math.min(line.length, m.occurrenceEnd - lineStart),
+      }));
+    charOffset = lineEnd;
+    return buildInlineAssLine(line, lineMatches, baseFontSize);
+  });
+  return assLines.join("\\N");
+}
+
+function buildAssContent(
+  records,
+  styleInput,
+  videoWidth,
+  videoHeight,
+  keywordMatches = [],
+  options = {},
+) {
+  const inlineKeywords = options.inlineKeywords === true;
   const style = normalizeBurnStyle(styleInput);
   const width = Math.max(320, Number(videoWidth) || 1920);
   const height = Math.max(320, Number(videoHeight) || 1080);
@@ -529,11 +604,23 @@ function buildAssContent(records, styleInput, videoWidth, videoHeight, keywordMa
     const end = formatAssTime(Math.max(r.end, r.start + 500));
     const display = normalizeDisplayText(r.text);
     const segMatches = filterMatchesForRecord(r, keywordMatches);
-    const baseDisplay =
-      segMatches.length > 0
-        ? stripKeywordsFromDisplay(display, segMatches)
-        : display;
-    const text = assEscapeText(wrapSubtitleText(baseDisplay || " ", style.maxCharsPerLine));
+    let text;
+    if (inlineKeywords && segMatches.length > 0) {
+      text = buildInlineAssTextForRecord(
+        display,
+        segMatches,
+        style.maxCharsPerLine,
+        fontSize,
+      );
+    } else {
+      const baseDisplay =
+        segMatches.length > 0
+          ? stripKeywordsFromDisplay(display, segMatches)
+          : display;
+      text = assEscapeText(
+        wrapSubtitleText(baseDisplay || " ", style.maxCharsPerLine),
+      );
+    }
     if (!text.replace(/\\N/g, "").trim()) return "";
     return `Dialogue: 0,${start},${end},Default,,0,0,0,,${text}`;
   }).filter(Boolean);
@@ -781,14 +868,20 @@ globalThis.__nodejsMain = async function main(params) {
       let keywordMatches = [];
       const enableKeywords = p.enableKeywordEffects !== false;
       const keywordGroups = buildKeywordGroups(p);
+      const useInlineKeywords =
+        enableKeywords &&
+        keywordGroups.length > 0 &&
+        isInlineKeywordRenderMode(p.keywordRenderMode);
+
       if (enableKeywords && keywordGroups.length > 0) {
         keywordMatches = matchKeywordsInRecords(records, keywordGroups);
         logSubtitle("info", "关键词匹配", {
           groups: keywordGroups.length,
           matches: keywordMatches.length,
+          inlineEmphasis: useInlineKeywords,
           keywords: keywordMatches.slice(0, 8).map((m) => m.keyword),
         });
-        if (keywordMatches.length > 0) {
+        if (keywordMatches.length > 0 && !useInlineKeywords) {
           keywordDrawtextFilter = buildKeywordDrawtextFilter(keywordMatches, {
             videoWidth: width,
             videoHeight: height,
@@ -804,14 +897,18 @@ globalThis.__nodejsMain = async function main(params) {
       const assPath = makeOutputPath("subtitle", "ass");
       fs.writeFileSync(
         assPath,
-        buildAssContent(records, burnStyle, width, height, keywordMatches),
+        buildAssContent(records, burnStyle, width, height, keywordMatches, {
+          inlineKeywords: useInlineKeywords,
+        }),
         "utf8",
       );
 
       globalThis.__native?.emitProgress?.(
         keywordDrawtextFilter
           ? "正在烧录字幕并叠加关键词特效…"
-          : "正在烧录字幕到视频…",
+          : useInlineKeywords && keywordMatches.length > 0
+            ? "正在烧录字幕（关键词内联高亮）…"
+            : "正在烧录字幕到视频…",
       );
       current = await addSubtitleToVideo(current, assPath, keywordDrawtextFilter);
       pipelineNative.deleteFile(audioPath);

scripts/nodejs/subtitle_keyword_drawtext.js

@@ -356,13 +356,19 @@ function stripKeywordsFromDisplay(displayText, matches) {
   return chars.join("").trim();
 }
 
-/** @param {{ start: number, end: number }} record 毫秒 */
+/** @param {{ start: number, end: number, text?: string }} record 毫秒 */
 function filterMatchesForRecord(record, matches) {
-  const segStart = record.start / 1000;
-  const segEnd = record.end / 1000;
-  return matches.filter(
-    (m) => m.startSec >= segStart - 0.02 && m.endSec <= segEnd + 0.02,
-  );
+  const display = normalizeDisplayText(record.text);
+  if (!display) return [];
+  return matches.filter((m) => m.lineText === display);
+}
+
+/**
+ * inline-emphasis：关键词用 ASS 内联样式，与正文同行同序（不用 drawtext 叠层）
+ * @param {string} [mode]
+ */
+function isInlineKeywordRenderMode(mode) {
+  return String(mode || "inline-emphasis") === "inline-emphasis";
 }
 
 module.exports = {
@@ -372,5 +378,6 @@ module.exports = {
   normalizeDisplayText,
   stripKeywordsFromDisplay,
   filterMatchesForRecord,
+  isInlineKeywordRenderMode,
   resolveFontFile,
 };