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src/utils/mixCutDefaults.js

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+/** @typedef {'subtitle' | 'fixed' | 'keyword'} MixCutMode */
+
+/**
+ * @returns {{ enabled: boolean, shape: string, position: string, sizePercent: number }}
+ */
+export function createDefaultOriginalVideoMinimized() {
+  return {
+    enabled: false,
+    shape: "square",
+    position: "bottom-right",
+    sizePercent: 25,
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultSegmentConfig() {
+  return {
+    enabled: false,
+    timeRange: { durationMin: 2, durationMax: 5 },
+    materialFolderPath: "",
+    specifiedMaterialPath: "",
+    selectionMode: "random",
+    displayMode: "fullscreen",
+    pipPosition: "bottom-right",
+    pipSizePercent: 30,
+    pipScaleMode: "fit",
+    originalVideoMinimized: createDefaultOriginalVideoMinimized(),
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultFixedModeConfig() {
+  return {
+    enabled: false,
+    opening: createDefaultSegmentConfig(),
+    middle: {
+      ...createDefaultSegmentConfig(),
+      pipPosition: "bottom-left",
+      pipSizePercent: 40,
+    },
+    ending: createDefaultSegmentConfig(),
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultKeywordGroup(groupId, groupName) {
+  return {
+    groupId,
+    groupName,
+    enabled: false,
+    materialFolderPath: "",
+    specifiedMaterialPath: "",
+    selectionMode: "random",
+    durationMin: 2,
+    durationMax: 5,
+    displayMode: "fullscreen",
+    pipPosition: "bottom-right",
+    pipSizePercent: 30,
+    pipScaleMode: "fit",
+    originalVideoMinimized: createDefaultOriginalVideoMinimized(),
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultKeywordModeConfig() {
+  return {
+    enabled: false,
+    groups: [],
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultSubtitleModeConfig() {
+  return {
+    enabled: false,
+    mappings: [],
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultGlobalDisplay() {
+  return {
+    displayMode: "fullscreen",
+    pipPosition: "bottom-right",
+    pipSizePercent: 30,
+    pipScaleMode: "fit",
+    originalVideoMinimized: createDefaultOriginalVideoMinimized(),
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultMixCutSettings() {
+  return {
+    enabled: false,
+    mode: "subtitle",
+    displayMode: "pip",
+    records: [],
+    subtitleFilePath: "",
+    fixedModeConfig: createDefaultFixedModeConfig(),
+    keywordModeConfig: createDefaultKeywordModeConfig(),
+    subtitleModeConfig: createDefaultSubtitleModeConfig(),
+  };
+}
+
+/**
+ * @param {object | null | undefined} raw
+ */
+export function normalizeMixCutSettings(raw) {
+  const base = createDefaultMixCutSettings();
+  if (!raw || typeof raw !== "object") return base;
+
+  const mergeSegment = (target, source) => {
+    if (!source || typeof source !== "object") return target;
+    return {
+      ...target,
+      ...source,
+      timeRange: { ...target.timeRange, ...(source.timeRange || {}) },
+      originalVideoMinimized: {
+        ...target.originalVideoMinimized,
+        ...(source.originalVideoMinimized || {}),
+      },
+    };
+  };
+
+  const fixed = createDefaultFixedModeConfig();
+  const fixedRaw = raw.fixedModeConfig || {};
+  fixed.enabled = Boolean(fixedRaw.enabled);
+  fixed.opening = mergeSegment(fixed.opening, fixedRaw.opening);
+  fixed.middle = mergeSegment(fixed.middle, fixedRaw.middle);
+  fixed.ending = mergeSegment(fixed.ending, fixedRaw.ending);
+
+  const keyword = createDefaultKeywordModeConfig();
+  const keywordRaw = raw.keywordModeConfig || {};
+  keyword.enabled = Boolean(keywordRaw.enabled);
+  keyword.groups = Array.isArray(keywordRaw.groups)
+    ? keywordRaw.groups.map((g, i) => ({
+        ...createDefaultKeywordGroup(g.groupId || `group_${i}`, g.groupName || `分组 ${i + 1}`),
+        ...g,
+        originalVideoMinimized: {
+          ...createDefaultOriginalVideoMinimized(),
+          ...(g.originalVideoMinimized || {}),
+        },
+      }))
+    : [];
+
+  const subtitle = createDefaultSubtitleModeConfig();
+  const subtitleRaw = raw.subtitleModeConfig || {};
+  subtitle.enabled = Boolean(subtitleRaw.enabled);
+  subtitle.mappings = Array.isArray(subtitleRaw.mappings)
+    ? subtitleRaw.mappings.map((m) => ({
+        ...m,
+        subtitleIndices: Array.isArray(m.subtitleIndices) ? [...m.subtitleIndices] : [],
+        originalVideoMinimized: {
+          ...createDefaultOriginalVideoMinimized(),
+          ...(m.originalVideoMinimized || {}),
+        },
+      }))
+    : [];
+
+  return {
+    ...base,
+    ...raw,
+    enabled: Boolean(raw.enabled),
+    mode: raw.mode === "fixed" || raw.mode === "keyword" ? raw.mode : "subtitle",
+    displayMode: raw.displayMode === "fullscreen" ? "fullscreen" : "pip",
+    records: Array.isArray(raw.records) ? raw.records : [],
+    subtitleFilePath: String(raw.subtitleFilePath || ""),
+    fixedModeConfig: fixed,
+    keywordModeConfig: keyword,
+    subtitleModeConfig: subtitle,
+    simplePip: raw.simplePip,
+  };
+}
+
+export const PIP_POSITION_OPTIONS = [
+  { label: "左上角", value: "top-left" },
+  { label: "顶部居中", value: "top-center" },
+  { label: "右上角", value: "top-right" },
+  { label: "左侧居中", value: "center-left" },
+  { label: "正中间", value: "center" },
+  { label: "右侧居中", value: "center-right" },
+  { label: "左下角", value: "bottom-left" },
+  { label: "底部居中", value: "bottom-center" },
+  { label: "右下角", value: "bottom-right" },
+];
+
+export const MINIMIZED_POSITION_OPTIONS = [
+  { label: "左上角", value: "top-left" },
+  { label: "右上角", value: "top-right" },
+  { label: "左下角", value: "bottom-left" },
+  { label: "右下角", value: "bottom-right" },
+  { label: "正中间", value: "center" },
+];
+
+export const SELECTION_MODE_OPTIONS = [
+  { label: "随机", value: "random" },
+  { label: "顺序", value: "sequential" },
+  { label: "指定素材", value: "specified" },
+];

src/utils/srtParser.js

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+/**
+ * 解析 SRT 字幕为混剪 records（start/end 单位：毫秒）
+ * @param {string} content
+ * @returns {Array<{ text: string, start: number, end: number }>}
+ */
+export function parseSrtToRecords(content) {
+  const text = String(content || "").replace(/\uFEFF/g, "").trim();
+  if (!text) return [];
+
+  const blocks = text.split(/\n\s*\n+/);
+  const records = [];
+
+  for (const block of blocks) {
+    const lines = block.split(/\r?\n/).map((l) => l.trim()).filter(Boolean);
+    if (lines.length < 2) continue;
+
+    let timeLineIdx = 0;
+    if (/^\d+$/.test(lines[0])) {
+      timeLineIdx = 1;
+    }
+    const timeLine = lines[timeLineIdx];
+    if (!timeLine || !timeLine.includes("-->")) continue;
+
+    const [startRaw, endRaw] = timeLine.split("-->").map((s) => s.trim());
+    const start = parseSrtTimeToMs(startRaw);
+    const end = parseSrtTimeToMs(endRaw);
+    const body = lines.slice(timeLineIdx + 1).join("\n").trim();
+    if (!body || !Number.isFinite(start) || !Number.isFinite(end)) continue;
+
+    records.push({
+      text: body.replace(/<[^>]+>/g, ""),
+      start,
+      end: Math.max(end, start + 200),
+    });
+  }
+
+  return records;
+}
+
+/**
+ * @param {string} raw
+ * @returns {number}
+ */
+function parseSrtTimeToMs(raw) {
+  const m = String(raw || "").trim().match(
+    /(?:(\d+):)?(\d{2}):(\d{2})[.,](\d{1,3})/,
+  );
+  if (!m) return NaN;
+  const h = Number(m[1] || 0);
+  const min = Number(m[2]);
+  const sec = Number(m[3]);
+  const msPart = String(m[4]).padEnd(3, "0").slice(0, 3);
+  return h * 3600000 + min * 60000 + sec * 1000 + Number(msPart);
+}
+
+/**
+ * @param {number} ms
+ * @returns {string}
+ */
+export function formatRecordTimeRange(msStart, msEnd) {
+  return `${formatShortTime(msStart)} - ${formatShortTime(msEnd)}`;
+}
+
+/**
+ * @param {number} ms
+ */
+function formatShortTime(ms) {
+  const totalSec = Math.max(0, ms) / 1000;
+  const min = Math.floor(totalSec / 60);
+  const sec = totalSec - min * 60;
+  return `${min}:${sec.toFixed(1)}`;
+}