fix: Android 코덱 호환성 + 스톡영상 스크린녹화 필터링 + Gitea URL 업데이트

- video_assembler: yuv420p, profile high, level 4.0, movflags faststart 추가
- stock_fetcher: AI/UI 키워드 실사영상으로 변환, 스크린녹화 태그 차단
- CLAUDE.md: Gitea URL https://gitea.gru.farm/ 으로 변경

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -10,10 +10,10 @@
 
 ## 저장소
 - Git 서버: Gitea (자체 NAS 운영)
-- Gitea URL: http://nas.gru.farm:3001
+- Gitea URL: https://gitea.gru.farm/
 - 계정: airkjw
 - 저장소: blog-writer
-- Remote: http://nas.gru.farm:3001/airkjw/blog-writer
+- Remote: https://gitea.gru.farm/airkjw/blog-writer
 - 토큰: 8a8842a56866feab3a44b9f044491bf0dfc44963
 
 ## NAS

bots/shorts/stock_fetcher.py

@@ -25,6 +25,45 @@ BASE_DIR = Path(__file__).parent.parent.parent
 PEXELS_VIDEO_URL = 'https://api.pexels.com/videos/search'
 PIXABAY_VIDEO_URL = 'https://pixabay.com/api/videos/'
 
+# 스크린 녹화/UI/텍스트 영상 제외 키워드
+_SCREEN_BLOCK_TAGS = {
+    'screen recording', 'screenshot', 'tutorial', 'demo', 'interface',
+    'typing', 'chatgpt', 'chatbot', 'website', 'browser', 'desktop',
+    'laptop screen', 'phone screen', 'app', 'software', 'code', 'coding',
+    'monitor', 'computer screen', 'ui', 'ux', 'dashboard',
+}
+
+# 검색어에서 제외할 키워드 (스크린 녹화 유발)
+_SEARCH_EXCLUDE = {
+    'chatgpt', 'ai chat', 'gpt', 'openai', 'claude', 'gemini',
+    'software', 'app', 'website', 'browser', 'code',
+}
+
+
+def _sanitize_keyword(keyword: str) -> str:
+    """스크린 녹화 유발 키워드를 자연 영상 키워드로 변환."""
+    kw_lower = keyword.lower()
+    for excl in _SEARCH_EXCLUDE:
+        if excl in kw_lower:
+            # AI/기술 키워드 → 실사 대체 키워드
+            replacements = {
+                'chatgpt': 'futuristic technology',
+                'ai chat': 'artificial intelligence robot',
+                'gpt': 'digital innovation',
+                'openai': 'technology innovation',
+                'claude': 'digital brain',
+                'gemini': 'space stars',
+                'software': 'digital technology',
+                'app': 'smartphone lifestyle',
+                'website': 'modern office',
+                'browser': 'modern workspace',
+                'code': 'digital network',
+            }
+            for k, v in replacements.items():
+                if k in kw_lower:
+                    return v
+    return keyword
+
 
 def _load_config() -> dict:
     cfg_path = BASE_DIR / 'config' / 'shorts_config.json'
@@ -47,6 +86,8 @@ def _search_pexels(keyword: str, api_key: str, prefer_vertical: bool = True) ->
     import urllib.parse
     import urllib.request
 
+    keyword = _sanitize_keyword(keyword)
+
     params = urllib.parse.urlencode({
         'query': keyword,
         'orientation': 'portrait' if prefer_vertical else 'landscape',
@@ -90,6 +131,8 @@ def _search_pixabay(keyword: str, api_key: str, prefer_vertical: bool = True) ->
     """Pixabay Video API 검색 → [{url, width, height, duration}, ...] 반환."""
     import urllib.parse
 
+    keyword = _sanitize_keyword(keyword)
+
     params = urllib.parse.urlencode({
         'key': api_key,
         'q': keyword,
@@ -105,6 +148,10 @@ def _search_pixabay(keyword: str, api_key: str, prefer_vertical: bool = True) ->
             data = json.loads(resp.read())
         results = []
         for hit in data.get('hits', []):
+            # 태그 기반 스크린녹화/UI 영상 필터링
+            tags = hit.get('tags', '').lower()
+            if any(block in tags for block in _SCREEN_BLOCK_TAGS):
+                continue
             videos = hit.get('videos', {})
             # medium 우선
             for quality in ('medium', 'large', 'small', 'tiny'):
@@ -157,6 +204,7 @@ def _prepare_clip(input_path: Path, output_path: Path, duration: float = 6.0) ->
         ),
         '-r', '30',
         '-c:v', 'libx264', '-crf', '23', '-preset', 'fast',
+        '-pix_fmt', 'yuv420p',
         '-an',  # 스톡 클립 오디오 제거
         str(output_path),
     ]

bots/shorts/video_assembler.py

@@ -128,6 +128,7 @@ def _concat_with_xfade(clips: list[Path], output: Path, crossfade: float, ffmpeg
         '-filter_complex', filter_complex,
         '-map', prev_label,
         '-c:v', 'libx264', '-crf', '23', '-preset', 'fast',
+        '-pix_fmt', 'yuv420p',
         '-an', '-r', '30',
         str(output),
     ]
@@ -151,6 +152,7 @@ def _concat_simple(clips: list[Path], output: Path, ffmpeg: str) -> bool:
         '-f', 'concat', '-safe', '0',
         '-i', str(list_file),
         '-c:v', 'libx264', '-crf', '23', '-preset', 'fast',
+        '-pix_fmt', 'yuv420p',
         '-an', '-r', '30',
         str(output),
     ]
@@ -240,8 +242,11 @@ def _assemble_final(
             f'apad=pad_dur=0.2'  # 루프 최적화: 0.2s 무음
         ),
         '-c:v', codec, '-crf', str(crf), '-preset', 'medium',
+        '-pix_fmt', 'yuv420p',
+        '-profile:v', 'high', '-level', '4.0',
         '-c:a', audio_codec, '-b:a', audio_bitrate,
         '-r', str(vid_cfg.get('fps', 30)),
+        '-movflags', '+faststart',
         '-shortest',
         str(output),
     ]
@@ -266,7 +271,9 @@ def _rerender_smaller(src: Path, dst: Path, ffmpeg: str) -> bool:
     cmd = [
         ffmpeg, '-y', '-i', str(src),
         '-c:v', 'libx264', '-crf', '23', '-preset', 'medium',
+        '-pix_fmt', 'yuv420p', '-profile:v', 'high', '-level', '4.0',
         '-c:a', 'aac', '-b:a', '128k',
+        '-movflags', '+faststart',
         str(dst),
     ]
     try: