diff --git a/VideoCompress/.gitignore b/VideoCompress/.gitignore
new file mode 100644
index 0000000..2e29888
--- /dev/null
+++ b/VideoCompress/.gitignore
@@ -0,0 +1,7 @@
+logs
+test
+config.json
+*.xml
+tmp
+build
+dist
\ No newline at end of file
diff --git a/pdf_index/README.md b/pdf_index/README.md
new file mode 100644
index 0000000..bfd7908
--- /dev/null
+++ b/pdf_index/README.md
@@ -0,0 +1,36 @@
+# Streamlit PDF 目录查看器
+
+一个最小可运行的 Streamlit 应用：
+- 读取 `doc.pdf`（放在当前目录），或通过页面上传 PDF。
+- 使用 PyMuPDF 提取 PDF 目录（Table of Contents）。
+- 在下拉框选择目录项后，显示该目录项对应的页面范围（到下一个目录项前一页）。
+- 使用 `st.pdf` 组件内嵌查看选定页面范围的临时 PDF。
+
+## 快速开始（Windows / cmd）
+
+1) 建议创建虚拟环境（可选）
+```cmd
+python -m venv .venv
+.venv\Scripts\activate
+```
+
+2) 安装依赖
+```cmd
+pip install -r requirements.txt
+```
+
+3) 将你的 PDF 放到本目录并命名为 `doc.pdf`（或在页面中上传）。
+
+4) 运行应用
+```cmd
+streamlit run app.py
+```
+
+## 用法说明
+- 左侧边栏可上传 PDF；若本地存在 `doc.pdf`，也会自动被加载。
+- 目录下拉框显示形如 `title (page)`。
+- 若 PDF 无目录，本应用会提示；可选择“全部页面”查看。
+
+## 已知限制
+- 目录页码通常为 PDF 内部页码（从 1 开始），个别 PDF 的 TOC 可能与实际页面偏移不一致。
+- 页面范围切片依赖 TOC 顺序，若 TOC 不规范可能导致范围不准。
diff --git a/pdf_index/app.py b/pdf_index/app.py
new file mode 100644
index 0000000..7c69fe8
--- /dev/null
+++ b/pdf_index/app.py
@@ -0,0 +1,121 @@
+from dataclasses import dataclass
+from typing import Any, List, Optional, Tuple
+from pathlib import Path
+
+import fitz  # PyMuPDF
+import streamlit as st
+from streamlit_pdf_viewer import pdf_viewer
+
+
+@dataclass
+class TocItem:
+    level: int
+    title: str
+    page_from: int  # 1-based
+    page_to: Optional[int]  # 1-based inclusive; None means until end
+
+
+def read_toc(doc: fitz.Document) -> List[Tuple[int, str, int]]:
+    # Returns list of (level, title, page) where page is 1-based per PyMuPDF
+    toc: List[Tuple[int, str, int]] = []
+    try:
+        get_toc: Any = getattr(doc, "get_toc", None)
+        if callable(get_toc):
+            toc = get_toc(simple=True)  # type: ignore[no-any-return]
+    except Exception:
+        toc = []
+    return [(lvl, title, max(1, pg)) for (lvl, title, pg) in toc]
+
+
+def normalize_ranges(toc: List[Tuple[int, str, int]], page_count: int) -> List[TocItem]:
+    if not toc:
+        return []
+    items: List[TocItem] = []
+    for i, (lvl, title, page) in enumerate(toc):
+        start = min(max(1, page), page_count)
+        if i + 1 < len(toc):
+            next_page = toc[i + 1][2]
+            end = max(1, min(page_count, next_page - 1))
+            if end < start:
+                end = start
+        else:
+            end = page_count
+        items.append(TocItem(level=lvl, title=title, page_from=start, page_to=end))
+    return items
+
+
+def _hash_doc(doc:fitz.Document):
+    "This is a fake hash, ENSURE GLOBAL DOCUMENT SAME"
+    return "12"
+
+@st.cache_resource(hash_funcs={fitz.Document:_hash_doc})
+def slice_pdf_pages(src_doc: fitz.Document, page_from: int, page_to: int) -> bytes:
+    # Create a new PDF with selected 1-based inclusive page range
+    new_pdf = fitz.open()
+    try:
+        start_i = max(1, page_from) - 1
+        end_i = max(start_i, page_to - 1)
+        for p in range(start_i, min(end_i, src_doc.page_count - 1) + 1):
+            new_pdf.insert_pdf(src_doc, from_page=p, to_page=p)
+        out = new_pdf.tobytes()
+        return out
+    finally:
+        new_pdf.close()
+        src_doc.close()
+
+
+def format_label(item: TocItem) -> str:
+    return f"{item.title} ({item.page_from:03d} - {item.page_to:03d})"
+
+@st.cache_resource
+def read_pdf():
+    pdf_path = Path("doc.pdf")
+    if not pdf_path.exists():
+        st.error("找不到doc.pdf")
+        st.stop()
+    
+    doc = fitz.open(pdf_path, filetype="pdf")
+    def _close_doc():
+        "Never close doc due to cache in global streamlit app."
+        pass
+    doc.close = _close_doc
+    page_count = doc.page_count
+
+    # 读取目录
+    raw_toc = read_toc(doc)
+    items = normalize_ranges(raw_toc, page_count)
+        
+    return doc,page_count,items
+
+
+def main():
+    st.set_page_config(page_title="PDF 目录查看器", layout="wide")
+    st.title("PDF 目录查看器")
+
+    doc,page_count,items = read_pdf()
+
+    st.subheader("目录")
+    labels = ["请选择"] + [format_label(it) for it in items]
+    selection = st.selectbox("选择章节", labels, index=0)
+    if selection == "请选择":
+        st.stop()
+    idx = labels.index(selection)
+    chosen = items[idx]
+    selected_range = (chosen.page_from, chosen.page_to or page_count)
+
+    rng_from, rng_to = selected_range
+    
+    st.subheader("预览")
+    try:
+        sliced_bytes = slice_pdf_pages(doc, rng_from, rng_to)
+        st.download_button("下载",sliced_bytes,file_name=f"{chosen.title}.pdf")
+        pdf_viewer(sliced_bytes,rendering=st.session_state.get("render","unwrap"))
+        # st.pdf(io.BytesIO(sliced_bytes), height=height, key="pdf_preview")
+    except Exception as e:
+        st.error(f"渲染失败：{e}")
+        
+    st.selectbox("使用其他渲染方式",["unwrap","legacy_embed","legacy_iframe"],key="render")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/pdf_index/requirements.txt b/pdf_index/requirements.txt
new file mode 100644
index 0000000..77d4d50
--- /dev/null
+++ b/pdf_index/requirements.txt
@@ -0,0 +1,3 @@
+streamlit>=1.37.0
+pymupdf>=1.24.0
+streamlit_pdf_viewer