Feat: Gemini supports video parsing (#10671)

### What problem does this PR solve?

Gemini supports video parsing.


![img_v3_02r8_adbd5adc-d665-4756-9a00-3ae0f12224fg](https://github.com/user-attachments/assets/30d8d296-c336-4b55-9823-803979e705ca)


![img_v3_02r8_ab60c046-1727-4029-ad2e-66097fd3ccbg](https://github.com/user-attachments/assets/441b1487-a970-427e-98b6-6e1e002f2bad)

Close: #10617

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

rag/app/picture.py

@@ -23,44 +23,62 @@ from PIL import Image
 from api.db import LLMType
 from api.db.services.llm_service import LLMBundle
 from deepdoc.vision import OCR
-from rag.nlp import tokenize
+from rag.nlp import rag_tokenizer, tokenize
 from rag.utils import clean_markdown_block
-from rag.nlp import rag_tokenizer
-
 
 ocr = OCR()
 
+# Gemini supported MIME types
+VIDEO_EXTS = [".mp4", ".mov", ".avi", ".flv", ".mpeg", ".mpg", ".webm", ".wmv", ".3gp", ".3gpp"]
+
 
 def chunk(filename, binary, tenant_id, lang, callback=None, **kwargs):
-    img = Image.open(io.BytesIO(binary)).convert('RGB')
     doc = {
         "docnm_kwd": filename,
         "title_tks": rag_tokenizer.tokenize(re.sub(r"\.[a-zA-Z]+$", "", filename)),
-        "image": img,
-        "doc_type_kwd": "image"
     }
-    bxs = ocr(np.array(img))
-    txt = "\n".join([t[0] for _, t in bxs if t[0]])
     eng = lang.lower() == "english"
-    callback(0.4, "Finish OCR: (%s ...)" % txt[:12])
-    if (eng and len(txt.split()) > 32) or len(txt) > 32:
-        tokenize(doc, txt, eng)
-        callback(0.8, "OCR results is too long to use CV LLM.")
-        return [doc]
 
-    try:
-        callback(0.4, "Use CV LLM to describe the picture.")
-        cv_mdl = LLMBundle(tenant_id, LLMType.IMAGE2TEXT, lang=lang)
-        img_binary = io.BytesIO()
-        img.save(img_binary, format='JPEG')
-        img_binary.seek(0)
-        ans = cv_mdl.describe(img_binary.read())
-        callback(0.8, "CV LLM respond: %s ..." % ans[:32])
-        txt += "\n" + ans
-        tokenize(doc, txt, eng)
-        return [doc]
-    except Exception as e:
-        callback(prog=-1, msg=str(e))
+    if any(filename.lower().endswith(ext) for ext in VIDEO_EXTS):
+        try:
+            doc.update({"doc_type_kwd": "video"})
+            cv_mdl = LLMBundle(tenant_id, llm_type=LLMType.IMAGE2TEXT, lang=lang)
+            ans = cv_mdl.chat(system="", history=[], gen_conf={}, video_bytes=binary, filename=filename)
+            callback(0.8, "CV LLM respond: %s ..." % ans[:32])
+            ans += "\n" + ans
+            tokenize(doc, ans, eng)
+            return [doc]
+        except Exception as e:
+            callback(prog=-1, msg=str(e))
+    else:
+        img = Image.open(io.BytesIO(binary)).convert("RGB")
+        doc.update(
+            {
+                "image": img,
+                "doc_type_kwd": "image",
+            }
+        )
+        bxs = ocr(np.array(img))
+        txt = "\n".join([t[0] for _, t in bxs if t[0]])
+        callback(0.4, "Finish OCR: (%s ...)" % txt[:12])
+        if (eng and len(txt.split()) > 32) or len(txt) > 32:
+            tokenize(doc, txt, eng)
+            callback(0.8, "OCR results is too long to use CV LLM.")
+            return [doc]
+
+        try:
+            callback(0.4, "Use CV LLM to describe the picture.")
+            cv_mdl = LLMBundle(tenant_id, LLMType.IMAGE2TEXT, lang=lang)
+            img_binary = io.BytesIO()
+            img.save(img_binary, format="JPEG")
+            img_binary.seek(0)
+            ans = cv_mdl.describe(img_binary.read())
+            callback(0.8, "CV LLM respond: %s ..." % ans[:32])
+            txt += "\n" + ans
+            tokenize(doc, txt, eng)
+            return [doc]
+        except Exception as e:
+            callback(prog=-1, msg=str(e))
 
     return []
 
@@ -79,7 +97,7 @@ def vision_llm_chunk(binary, vision_model, prompt=None, callback=None):
 
     try:
         with io.BytesIO() as img_binary:
-            img.save(img_binary, format='JPEG')
+            img.save(img_binary, format="JPEG")
             img_binary.seek(0)
             ans = clean_markdown_block(vision_model.describe_with_prompt(img_binary.read(), prompt))
             txt += "\n" + ans

rag/llm/cv_model.py

@@ -16,6 +16,7 @@
 import base64
 import json
 import os
+import logging
 from abc import ABC
 from copy import deepcopy
 from io import BytesIO
@@ -529,6 +530,7 @@ class GeminiCV(Base):
 
         client.configure(api_key=key)
         _client = client.get_default_generative_client()
+        self.api_key=key
         self.model_name = model_name
         self.model = GenerativeModel(model_name=self.model_name)
         self.model._client = _client
@@ -571,7 +573,15 @@ class GeminiCV(Base):
                 res = self.model.generate_content(input)
                 return res.text, total_token_count_from_response(res)
 
-    def chat(self, system, history, gen_conf, images=[]):
+
+    def chat(self, system, history, gen_conf, images=[], video_bytes=None, filename=""):
+        if video_bytes:
+            try:
+                summary, summary_num_tokens = self._process_video(video_bytes, filename)
+                return summary, summary_num_tokens
+            except Exception as e:
+                return "**ERROR**: " + str(e), 0
+
         generation_config = dict(temperature=gen_conf.get("temperature", 0.3), top_p=gen_conf.get("top_p", 0.7))
         try:
             response = self.model.generate_content(
@@ -603,6 +613,48 @@ class GeminiCV(Base):
 
         yield total_token_count_from_response(response)
 
+    def _process_video(self, video_bytes, filename):
+        from google import genai
+        from google.genai import types
+        import tempfile
+        from pathlib import Path
+
+        video_size_mb = len(video_bytes) / (1024 * 1024)
+        client = genai.Client(api_key=self.api_key)
+
+        tmp_path = None
+        try:
+            if video_size_mb <= 20:
+                response = client.models.generate_content(
+                    model="models/gemini-2.5-flash",
+                    contents=types.Content(parts=[
+                        types.Part(inline_data=types.Blob(data=video_bytes, mime_type="video/mp4")),
+                        types.Part(text="Please summarize the video in proper sentences.")
+                    ])
+                )
+            else:
+                logging.info(f"Video size {video_size_mb:.2f}MB exceeds 20MB. Using Files API...")
+                video_suffix = Path(filename).suffix or ".mp4"
+                with tempfile.NamedTemporaryFile(delete=False, suffix=video_suffix) as tmp:
+                    tmp.write(video_bytes)
+                    tmp_path = Path(tmp.name)
+                uploaded_file = client.files.upload(file=tmp_path)
+
+                response = client.models.generate_content(
+                    model="gemini-2.5-flash",
+                    contents=[uploaded_file, "Please summarize this video in proper sentences."]
+                )
+
+            summary = response.text or ""
+            logging.info(f"Video summarized: {summary[:32]}...")
+            return summary, num_tokens_from_string(summary)
+        except Exception as e:
+            logging.error(f"Video processing failed: {e}")
+            raise
+        finally:
+            if tmp_path and tmp_path.exists():
+                tmp_path.unlink()
+
 
 class NvidiaCV(Base):
     _FACTORY_NAME = "NVIDIA"