try

tiktok2bsky.py

@@ -542,18 +542,23 @@ def get_video_duration(path: str) -> float:
 def compress_video(input_path: str, output_path: str,
                    max_duration: int = VIDEO_MAX_DURATION_S,
                    max_size_bytes: int = VIDEO_MAX_SIZE_BYTES) -> bool:
-    """
-    Trim to max_duration and compress to fit max_size_bytes.
-    Returns True on success.
-    """
     try:
         duration = get_video_duration(input_path)
-        trim_to  = min(duration, max_duration)
 
-        # Target bitrate calculation (leave 10 % headroom)
+        # Guard: ffprobe returned 0 = file is not a valid video
+        if duration <= 0:
+            logging.error(
+                f"❌ compress_video: ffprobe returned duration={duration} "
+                f"— file is not a valid video: {input_path} "
+                f"({os.path.getsize(input_path)} bytes)"
+            )
+            return False
+
+        trim_to = min(duration, max_duration)
+
         target_bits = max_size_bytes * 8 * 0.90
         target_kbps = int(target_bits / trim_to / 1000)
-        video_kbps  = max(200, target_kbps - 128)   # reserve 128 k for audio
+        video_kbps  = max(200, target_kbps - 128)
 
         logging.info(
             f"🎬 Compressing: duration={duration:.1f}s → trim={trim_to:.1f}s, "
@@ -633,7 +638,10 @@ def download_video(url: str, output_path: str,
 
 def download_video_ytdlp(url: str, output_path: str,
                           cookies: list = None) -> bool:
-    """Download a video using yt-dlp, optionally injecting cookies."""
+    """
+    Download a video using yt-dlp with TikTok impersonation support.
+    curl_cffi must be installed for impersonation to work.
+    """
     cookie_file = None
     try:
         import yt_dlp
@@ -644,9 +652,11 @@ def download_video_ytdlp(url: str, output_path: str,
             "quiet":               True,
             "no_warnings":         False,
             "merge_output_format": "mp4",
+            # ── TikTok impersonation ───────────────────────────────────
+            # Requires curl_cffi: pip install curl-cffi
+            "impersonate":         "chrome",
         }
 
-        # Write cookies to a temp Netscape file if provided
         if cookies:
             cookie_file = _write_netscape_cookies(cookies)
             if cookie_file:
@@ -655,14 +665,21 @@ def download_video_ytdlp(url: str, output_path: str,
         with yt_dlp.YoutubeDL(ydl_opts) as ydl:
             ydl.download([url])
 
-        if os.path.exists(output_path) and os.path.getsize(output_path) > 10_000:
-            logging.info(
-                f"✅ yt-dlp download OK: "
-                f"{os.path.getsize(output_path) / 1024 / 1024:.1f} MB"
+        # Validate: must exist AND be a real video (> 50 KB)
+        if os.path.exists(output_path):
+            size = os.path.getsize(output_path)
+            if size > 50_000:
+                logging.info(
+                    f"✅ yt-dlp download OK: {size / 1024 / 1024:.1f} MB"
+                )
+                return True
+            logging.error(
+                f"❌ yt-dlp output too small ({size} bytes) — "
+                f"likely an HTML error page, not a video."
             )
-            return True
+            return False
 
-        logging.error("❌ yt-dlp produced no output file or file too small.")
+        logging.error("❌ yt-dlp produced no output file.")
         return False
 
     except Exception as e:
@@ -672,7 +689,6 @@ def download_video_ytdlp(url: str, output_path: str,
         if cookie_file and os.path.exists(cookie_file):
             os.unlink(cookie_file)
 
-
 def _write_netscape_cookies(cookies: list) -> str | None:
     """Write cookies list to a Netscape-format temp file for yt-dlp."""
     try: