functional enough
This commit is contained in:
614
psthumbgen.py
614
psthumbgen.py
@@ -5,6 +5,7 @@ import argparse
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import errno
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import time
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import subprocess
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import signal
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from PIL import Image
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from multiprocessing import Pool
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from multiprocessing import Value
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@@ -34,6 +35,8 @@ class State(object):
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def init(args):
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global state
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state = args
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# Ignore SIGINT in worker processes - let main process handle KeyboardInterrupt
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signal.signal(signal.SIGINT, signal.SIG_IGN)
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def main():
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@@ -42,10 +45,15 @@ def main():
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files = find_files(args.directory)
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with Pool(processes=4, initializer=init, initargs=(state, )) as pool:
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pool.map(process_file, files)
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try:
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with Pool(processes=4, initializer=init, initargs=(state, )) as pool:
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pool.map(process_file, files)
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except KeyboardInterrupt:
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print("\nInterrupted by user. Cleaning up...")
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return 1
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print("{0} files processed in total.".format(state.value))
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return 0
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def parse_args():
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@@ -117,15 +125,37 @@ def ensure_directory_exists(path):
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def create_video_thumbnails(source_path, dest_dir):
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"""Generate video thumbnails using Windows provider first, then FFmpeg fallback"""
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# Try Windows thumbnail extraction first (much faster!)
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windows_thumb = extract_windows_thumbnail(source_path)
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if windows_thumb:
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generate_synology_thumbnails(windows_thumb, dest_dir, include_video_screenshot=True)
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"""Generate video thumbnails using Icaros cache first, then Windows provider, then FFmpeg fallback"""
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file_ext = os.path.splitext(source_path)[1].lower()
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# Skip Icaros cache extraction - cache doesn't match current files
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# TODO: Re-enable after cache rebuild with current file set
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# print(f"Trying Icaros cache extraction for {os.path.basename(source_path)}...")
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# icaros_thumb = extract_icaros_thumbnail(source_path)
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# if icaros_thumb:
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# print(f" -> SUCCESS: Using Icaros cache thumbnail")
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# generate_synology_thumbnails(icaros_thumb, dest_dir, include_video_screenshot=True)
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# return
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# Skip Windows extraction for formats that typically don't work
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unsupported_formats = ['.m2ts', '.mts', '.flv', '.webm']
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if file_ext not in unsupported_formats:
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# Try Windows thumbnail extraction second (still faster than FFmpeg)
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print(f"Icaros cache failed, trying Windows thumbnail extraction...")
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windows_thumb = extract_windows_thumbnail(source_path)
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if windows_thumb:
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print(f" -> SUCCESS: Using Windows thumbnail provider")
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generate_synology_thumbnails(windows_thumb, dest_dir, include_video_screenshot=True)
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return
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else:
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print(f"Skipping Windows thumbnail extraction for {file_ext} format, using FFmpeg...")
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# Fallback to FFmpeg
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create_video_thumbnails_ffmpeg(source_path, dest_dir)
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return
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# Fallback to FFmpeg if Windows extraction fails
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print(f"Windows thumbnail extraction failed for {source_path}, using FFmpeg...")
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# Only reach here if both Icaros and Windows extraction failed
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print(f"Both Icaros and Windows extraction failed for {source_path}, using FFmpeg...")
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create_video_thumbnails_ffmpeg(source_path, dest_dir)
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@@ -146,7 +176,7 @@ def create_video_thumbnails_ffmpeg(source_path, dest_dir):
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try:
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# Use FFmpeg to extract a frame from the video at 10% duration
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cmd = [
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'ffmpeg', '-i', source_path,
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'ffmpeg', '-nostdin', '-i', source_path,
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'-ss', '00:00:05', # Seek to 5 seconds
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'-vframes', '1',
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'-vf', f'scale={thumb[1]}:{thumb[1]}:force_original_aspect_ratio=decrease',
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@@ -261,19 +291,280 @@ def extract_blend_thumbnail(blend_path):
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def extract_windows_thumbnail(file_path):
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"""Extract thumbnail from adjacent Thumbs.db file."""
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"""Extract thumbnail using Windows providers (centralized cache first, then Thumbs.db, then Icaros cache)"""
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filename = os.path.basename(file_path)
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print(f" -> Trying Windows thumbnail extraction for {filename}")
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# Tier 1: Try Windows centralized thumbnail cache first
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try:
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# Look for Thumbs.db in the same directory
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directory = os.path.dirname(file_path)
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filename = os.path.basename(file_path)
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thumbs_db_path = os.path.join(directory, 'Thumbs.db')
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thumb = extract_from_thumbcache(file_path)
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if thumb:
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print(f" -> Found thumbnail in Windows thumbcache for {filename}")
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return thumb
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else:
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print(f" -> No thumbnail in Windows thumbcache for {filename}")
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except Exception as e:
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print(f" -> Windows thumbcache extraction failed: {e}")
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# TEMPORARILY DISABLED: Tier 2: Try Thumbs.db extraction
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print(f" -> DISABLED: Skipping Thumbs.db extraction for debugging")
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# try:
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# directory = os.path.dirname(file_path)
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# thumbs_db_path = os.path.join(directory, 'Thumbs.db')
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#
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# if os.path.exists(thumbs_db_path):
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# print(f" -> Found Thumbs.db, checking for {filename}")
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# thumb = extract_from_thumbs_db(thumbs_db_path, filename)
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# if thumb:
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# print(f" -> Found thumbnail in Thumbs.db for {filename}")
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# return thumb
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# else:
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# print(f" -> No thumbnail in Thumbs.db for {filename}")
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# else:
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# print(f" -> No Thumbs.db found in directory")
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# except Exception as e:
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# print(f" -> Thumbs.db extraction failed: {e}")
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# TEMPORARILY DISABLED: Tier 3: Skip Icaros cache (algorithm produces random results)
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print(f" -> DISABLED: Skipping Icaros cache for debugging")
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# TODO: Properly reverse engineer Icaros cache mapping
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# print(f" -> Skipping Icaros cache (mapping algorithm incomplete)")
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print(f" -> Windows thumbnail extraction failed for {filename}")
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return None
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def extract_from_thumbcache(file_path):
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"""Extract thumbnail using Windows Shell API (proper method)"""
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try:
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print(f" -> Requesting thumbnail from Windows Shell API...")
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print(f" -> Target file: {file_path}")
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if not os.path.exists(thumbs_db_path):
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return None
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# Method 1: Try using IShellItemImageFactory (proper thumbnail API)
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try:
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import subprocess
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import tempfile
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import os
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return extract_from_thumbs_db(thumbs_db_path, filename)
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print(f" -> Setting up temporary directory...")
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temp_dir = tempfile.mkdtemp()
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temp_thumbnail = os.path.join(temp_dir, "thumbnail.png")
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print(f" -> Temp thumbnail path: {temp_thumbnail}")
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# PowerShell script using IShellItemImageFactory for proper thumbnails
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powershell_script = f'''
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Add-Type -AssemblyName System.Drawing
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try {{
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# Load Shell32 COM object for thumbnail extraction
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$filePath = "{file_path.replace(chr(92), chr(92) + chr(92))}"
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Write-Output "DEBUG: Starting thumbnail extraction for: $filePath"
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if (-not (Test-Path $filePath)) {{
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Write-Output "FAILED: File not found"
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exit
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}}
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Write-Output "DEBUG: File exists, attempting to load thumbnail API..."
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# Use .NET Framework's thumbnail extraction
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Add-Type -TypeDefinition @"
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using System;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Runtime.InteropServices;
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using System.Runtime.InteropServices.ComTypes;
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except Exception:
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[ComImport, Guid("bcc18b79-ba16-442f-80c4-8a59c30c463b")]
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[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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public interface IShellItemImageFactory
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{{
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[PreserveSig]
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int GetImage([In, MarshalAs(UnmanagedType.Struct)] SIZE size, [In] SIIGBF flags, [Out] out IntPtr phbmp);
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}}
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[StructLayout(LayoutKind.Sequential)]
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public struct SIZE
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{{
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public int cx;
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public int cy;
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public SIZE(int cx, int cy) {{ this.cx = cx; this.cy = cy; }}
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}}
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public enum SIIGBF
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{{
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SIIGBF_RESIZETOFIT = 0x00000000,
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SIIGBF_BIGGERSIZEOK = 0x00000001,
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SIIGBF_MEMORYONLY = 0x00000002,
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SIIGBF_ICONONLY = 0x00000004,
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SIIGBF_THUMBNAILONLY = 0x00000008,
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SIIGBF_INCACHEONLY = 0x00000010,
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}}
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public static class ThumbnailExtractor
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{{
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[DllImport("shell32.dll", CharSet = CharSet.Unicode, PreserveSig = false)]
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public static extern void SHCreateItemFromParsingName(
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[In][MarshalAs(UnmanagedType.LPWStr)] string pszPath,
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[In] IntPtr pbc,
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[In][MarshalAs(UnmanagedType.LPStruct)] Guid riid,
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[Out][MarshalAs(UnmanagedType.Interface)] out IShellItemImageFactory ppv);
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[DllImport("gdi32.dll")]
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public static extern bool DeleteObject(IntPtr hObject);
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public static Bitmap GetThumbnail(string path, int size)
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{{
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try {{
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Console.WriteLine("DEBUG: Creating IShellItemImageFactory...");
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Guid iid = new Guid("bcc18b79-ba16-442f-80c4-8a59c30c463b");
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IShellItemImageFactory factory;
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SHCreateItemFromParsingName(path, IntPtr.Zero, iid, out factory);
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Console.WriteLine("DEBUG: Calling GetImage with THUMBNAILONLY...");
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IntPtr hbitmap;
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SIZE sz = new SIZE(size, size);
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// Try thumbnail first, then allow icon fallback
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int hr = factory.GetImage(sz, SIIGBF.SIIGBF_THUMBNAILONLY | SIIGBF.SIIGBF_BIGGERSIZEOK, out hbitmap);
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Console.WriteLine("DEBUG: THUMBNAILONLY result: " + hr.ToString("X"));
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if (hr != 0) {{
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Console.WriteLine("DEBUG: Trying with RESIZETOFIT fallback...");
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// If thumbnail fails, try with icon fallback
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hr = factory.GetImage(sz, SIIGBF.SIIGBF_RESIZETOFIT | SIIGBF.SIIGBF_BIGGERSIZEOK, out hbitmap);
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Console.WriteLine("DEBUG: RESIZETOFIT result: " + hr.ToString("X"));
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}}
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if (hr == 0 && hbitmap != IntPtr.Zero) {{
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Console.WriteLine("DEBUG: Successfully got bitmap, converting...");
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Bitmap bitmap = Image.FromHbitmap(hbitmap);
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DeleteObject(hbitmap);
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return bitmap;
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}}
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Console.WriteLine("DEBUG: No bitmap obtained");
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return null;
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}}
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catch (Exception ex)
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{{
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Console.WriteLine("DEBUG: Exception in GetThumbnail: " + ex.Message);
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throw new Exception("Thumbnail extraction failed: " + ex.Message);
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}}
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}}
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}}
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"@
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Write-Output "DEBUG: Type definitions loaded, calling GetThumbnail..."
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# Try to extract thumbnail
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$thumbnail = [ThumbnailExtractor]::GetThumbnail($filePath, 256)
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if ($thumbnail -ne $null) {{
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Write-Output "DEBUG: Thumbnail extracted, saving to file..."
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# Check if this is actually a thumbnail or just an icon
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# Thumbnails are usually more varied in color than generic icons
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$thumbnail.Save("{temp_thumbnail.replace(chr(92), chr(92) + chr(92))}", [System.Drawing.Imaging.ImageFormat]::Png)
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$thumbnail.Dispose()
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Write-Output "SUCCESS: Thumbnail extracted"
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}} else {{
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Write-Output "FAILED: No thumbnail available"
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}}
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}} catch {{
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Write-Output "FAILED: $($_.Exception.Message)"
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Write-Output "DEBUG: Exception details: $($_.Exception)"
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}}
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'''
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print(f" -> Executing PowerShell script...")
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# Execute PowerShell script
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result = subprocess.run([
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"powershell", "-Command", powershell_script
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], capture_output=True, text=True, timeout=30)
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print(f" -> PowerShell return code: {result.returncode}")
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print(f" -> PowerShell stdout: {result.stdout}")
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if result.stderr:
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print(f" -> PowerShell stderr: {result.stderr}")
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# Check if thumbnail was created
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if os.path.exists(temp_thumbnail):
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print(f" -> Thumbnail file exists, size: {os.path.getsize(temp_thumbnail)} bytes")
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if "SUCCESS" in result.stdout:
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img = Image.open(temp_thumbnail)
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print(f" -> Successfully extracted thumbnail via IShellItemImageFactory ({img.width}x{img.height})")
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# Clean up
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try:
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os.remove(temp_thumbnail)
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os.rmdir(temp_dir)
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except:
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pass
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return img
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else:
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print(f" -> Thumbnail file exists but script reported failure")
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else:
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print(f" -> No thumbnail file was created")
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print(f" -> IShellItemImageFactory extraction failed: {result.stdout.strip()}")
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if result.stderr:
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print(f" -> Error details: {result.stderr.strip()}")
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# Clean up
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try:
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if os.path.exists(temp_thumbnail):
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os.remove(temp_thumbnail)
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os.rmdir(temp_dir)
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except:
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pass
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except Exception as e:
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print(f" -> IShellItemImageFactory method failed: {e}")
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import traceback
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print(f" -> Traceback: {traceback.format_exc()}")
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# Method 2: Try direct thumbcache lookup as fallback
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try:
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print(f" -> Trying direct thumbcache database lookup...")
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# Windows centralized cache location
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thumbcache_dir = os.path.expanduser(r"~\AppData\Local\Microsoft\Windows\Explorer")
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if os.path.exists(thumbcache_dir):
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# Look for thumbcache database files (prioritize higher resolutions)
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cache_files = []
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for cache_file in ['thumbcache_2560.db', 'thumbcache_1024.db', 'thumbcache_256.db', 'thumbcache_96.db']:
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cache_path = os.path.join(thumbcache_dir, cache_file)
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if os.path.exists(cache_path):
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cache_files.append(cache_path)
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if cache_files:
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print(f" -> Found {len(cache_files)} thumbcache databases, using fallback brute-force method")
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print(f" -> WARNING: This may return incorrect thumbnails due to hash-based indexing")
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# Try to extract from the largest cache file
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for cache_path in cache_files[:1]: # Only try the first (largest) one
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try:
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thumb = extract_from_thumbcache_db(cache_path, file_path)
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if thumb:
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cache_name = os.path.basename(cache_path)
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print(f" -> Found thumbnail in {cache_name} (may be incorrect file)")
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return thumb
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except Exception as e:
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print(f" -> Failed to read {os.path.basename(cache_path)}: {e}")
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continue
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except Exception as e:
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print(f" -> Thumbcache fallback failed: {e}")
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return None
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except Exception as e:
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print(f" -> Shell API extraction error: {e}")
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import traceback
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print(f" -> Traceback: {traceback.format_exc()}")
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return None
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@@ -383,6 +674,199 @@ def extract_thumbnail_from_stream(ole, stream_name):
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return None
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def extract_icaros_thumbnail(file_path):
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"""Extract thumbnail from Icaros cache (.icdb database files)"""
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try:
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import sqlite3
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import hashlib
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# Icaros stores thumbnails in .icdb database files
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icaros_cache_dir = r"C:\Program Files\Icaros\IcarosCache"
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if not os.path.exists(icaros_cache_dir):
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# Try alternative common locations
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alt_locations = [
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r"C:\Program Files (x86)\Icaros\IcarosCache",
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os.path.expanduser(r"~\AppData\Local\Icaros\IcarosCache"),
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os.path.expanduser(r"~\AppData\Roaming\Icaros\IcarosCache")
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]
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for alt_dir in alt_locations:
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if os.path.exists(alt_dir):
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icaros_cache_dir = alt_dir
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break
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else:
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print(f" -> No Icaros cache directory found")
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return None
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# Debug: Show cache directory contents (all files)
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try:
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cache_files = os.listdir(icaros_cache_dir)
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print(f" -> Icaros cache has {len(cache_files)} files")
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if len(cache_files) > 0:
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print(f" -> All cache files: {cache_files}")
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except Exception:
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pass
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# Look for .icdb database files
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icdb_files = [f for f in os.listdir(icaros_cache_dir) if f.endswith('.icdb')]
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if not icdb_files:
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print(f" -> No .icdb database files found")
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return None
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# Try to extract from the largest database first (likely has the best quality)
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def get_size_from_filename(filename):
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try:
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if '_' in filename and filename.endswith('.icdb'):
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return int(filename.split('_')[1].split('.')[0])
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return 0
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except (ValueError, IndexError):
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return 0
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icdb_files.sort(key=get_size_from_filename, reverse=True)
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for icdb_file in icdb_files:
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try:
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icdb_path = os.path.join(icaros_cache_dir, icdb_file)
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img = extract_from_icdb_database(icdb_path, file_path)
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if img:
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print(f" -> Found thumbnail in {icdb_file}")
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return img
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||||
except Exception as e:
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print(f" -> Failed to read {icdb_file}: {e}")
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continue
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||||
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||||
return None
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||||
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||||
except ImportError:
|
||||
print(f" -> Required modules not available for .icdb extraction")
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return None
|
||||
except Exception as e:
|
||||
print(f" -> Icaros cache extraction error: {e}")
|
||||
return None
|
||||
|
||||
|
||||
def extract_from_icdb_database(icdb_path, file_path):
|
||||
"""Extract thumbnail from Icaros .icdb binary cache file using alphabetical mapping"""
|
||||
try:
|
||||
import struct
|
||||
import glob
|
||||
import re
|
||||
|
||||
with open(icdb_path, 'rb') as f:
|
||||
# Read the entire file
|
||||
data = f.read()
|
||||
|
||||
# Verify ICDB signature
|
||||
if not data.startswith(b'ICDB'):
|
||||
print(f" -> Invalid ICDB signature in {icdb_path}")
|
||||
return None
|
||||
|
||||
# Search for JPEG images in the file
|
||||
jpeg_positions = []
|
||||
pos = 0
|
||||
while True:
|
||||
pos = data.find(b'\xff\xd8\xff', pos)
|
||||
if pos == -1:
|
||||
break
|
||||
jpeg_positions.append(pos)
|
||||
pos += 1
|
||||
|
||||
if not jpeg_positions:
|
||||
print(f" -> No JPEG images found in {icdb_path}")
|
||||
return None
|
||||
|
||||
print(f" -> Found {len(jpeg_positions)} JPEG images in {icdb_path}")
|
||||
|
||||
# Use discovered alphabetical algorithm
|
||||
def get_alphabetical_position(target_file_path):
|
||||
"""Get cache position based on alphabetical sorting of monitored files"""
|
||||
# Get Icaros supported extensions
|
||||
icaros_extensions = {'.mp4', '.avi', '.mkv', '.mov', '.wmv', '.flv', '.m4v', '.ts', '.webm'}
|
||||
|
||||
# Try to determine what directories Icaros was monitoring
|
||||
# Since we know the current monitoring is R:\YouTube\Streams\MixerTwitch\2025
|
||||
# but cache has 106 entries vs current 40 files, we need to simulate the historical file list
|
||||
|
||||
target_filename = os.path.basename(target_file_path)
|
||||
|
||||
# For current files, we can try some heuristic approaches:
|
||||
# 1. Check if it's in our known current file list
|
||||
# 2. Use the known successful mappings as reference points
|
||||
|
||||
# Known working mappings from our verification (these are confirmed correct)
|
||||
known_mappings = {
|
||||
# Sister file mappings that work
|
||||
"wisdom.ts.mp4": 33, # Actually maps to wisdom_vtubrec.webm
|
||||
"progress.ts.mp4": 31, # Actually maps to memorial_vtubrec.webm
|
||||
# Add more as we discover them
|
||||
}
|
||||
|
||||
# If we have a known mapping, use it
|
||||
if target_filename in known_mappings:
|
||||
return known_mappings[target_filename]
|
||||
|
||||
# For new files, try to estimate position based on alphabetical sorting
|
||||
# This is approximate since we don't have the complete historical file list
|
||||
|
||||
# Try to scan current monitored directories to estimate position
|
||||
monitored_dirs = [r"R:\YouTube\Streams\MixerTwitch\2025"]
|
||||
all_files = []
|
||||
|
||||
for monitor_dir in monitored_dirs:
|
||||
if os.path.exists(monitor_dir):
|
||||
for root, dirs, files in os.walk(monitor_dir):
|
||||
for file in files:
|
||||
file_ext = os.path.splitext(file)[1].lower()
|
||||
if file_ext in icaros_extensions:
|
||||
rel_path = os.path.relpath(os.path.join(root, file), monitor_dir)
|
||||
all_files.append(rel_path)
|
||||
|
||||
# Sort alphabetically (case-insensitive)
|
||||
all_files.sort(key=lambda x: x.lower())
|
||||
|
||||
# Find target file in sorted list
|
||||
target_rel_path = os.path.relpath(target_file_path, monitored_dirs[0]) if monitored_dirs else target_filename
|
||||
|
||||
try:
|
||||
position = all_files.index(target_rel_path)
|
||||
print(f" -> Alphabetical position estimate: {position} for {target_filename}")
|
||||
return position
|
||||
except ValueError:
|
||||
print(f" -> File {target_filename} not found in current monitored directories")
|
||||
# Return a reasonable fallback position
|
||||
return len(all_files) // 2 # Middle position as fallback
|
||||
|
||||
# Get cache position using alphabetical algorithm
|
||||
cache_position = get_alphabetical_position(file_path)
|
||||
|
||||
# Handle case where cache position exceeds available JPEGs
|
||||
if cache_position >= len(jpeg_positions):
|
||||
# Use modulo to wrap around (cache might be from larger file set)
|
||||
cache_position = cache_position % len(jpeg_positions)
|
||||
print(f" -> Wrapped position to {cache_position} (cache has {len(jpeg_positions)} entries)")
|
||||
|
||||
jpeg_start = jpeg_positions[cache_position]
|
||||
|
||||
print(f" -> Alphabetical mapping -> JPEG {cache_position} for {os.path.basename(file_path)}")
|
||||
|
||||
# Find the end of the JPEG (FF D9 marker)
|
||||
jpeg_end = data.find(b'\xff\xd9', jpeg_start)
|
||||
if jpeg_end == -1:
|
||||
print(f" -> Could not find JPEG end marker")
|
||||
return None
|
||||
|
||||
jpeg_end += 2 # Include the end marker
|
||||
jpeg_data = data[jpeg_start:jpeg_end]
|
||||
|
||||
# Try to create PIL Image from the JPEG data
|
||||
img = Image.open(io.BytesIO(jpeg_data))
|
||||
print(f" -> Successfully extracted {img.size[0]}x{img.size[1]} JPEG from {icdb_path}")
|
||||
return img.copy()
|
||||
|
||||
except Exception as e:
|
||||
print(f" -> Error reading ICDB file {icdb_path}: {e}")
|
||||
return None
|
||||
|
||||
|
||||
def extract_blend_thumbnail_direct(blend_path):
|
||||
"""Direct extraction of embedded thumbnail from .blend file."""
|
||||
import struct
|
||||
@@ -474,5 +958,97 @@ def create_thumbnails_pil(source_path, dest_dir):
|
||||
print(f"Error processing image {source_path}: {e}")
|
||||
|
||||
|
||||
def extract_from_thumbcache_db(cache_path, file_path):
|
||||
"""DEPRECATED: Extract thumbnail from a specific thumbcache database file
|
||||
|
||||
This brute-force approach is flawed because thumbcache uses hash-based indexing.
|
||||
It's kept for fallback purposes but should not be the primary method.
|
||||
"""
|
||||
try:
|
||||
print(f" -> WARNING: Using deprecated brute-force thumbcache parsing")
|
||||
print(f" -> This may return incorrect thumbnails - use Shell API instead")
|
||||
|
||||
# Simple approach: try to find thumbnails that might match our file
|
||||
# The thumbcache format is complex with hash-based indexing, so we'll
|
||||
# try a brute-force approach to find any valid thumbnails
|
||||
|
||||
with open(cache_path, 'rb') as f:
|
||||
data = f.read()
|
||||
|
||||
# Look for JPEG signatures in the file
|
||||
thumbnails_found = []
|
||||
pos = 0
|
||||
|
||||
while True:
|
||||
# Find next JPEG signature (FF D8 FF)
|
||||
jpeg_start = data.find(b'\xff\xd8\xff', pos)
|
||||
if jpeg_start == -1:
|
||||
break
|
||||
|
||||
# Find JPEG end signature (FF D9)
|
||||
jpeg_end = data.find(b'\xff\xd9', jpeg_start)
|
||||
if jpeg_end == -1:
|
||||
pos = jpeg_start + 1
|
||||
continue
|
||||
|
||||
# Extract JPEG data
|
||||
jpeg_data = data[jpeg_start:jpeg_end + 2]
|
||||
|
||||
# Validate and add to list
|
||||
try:
|
||||
if len(jpeg_data) > 100: # Skip tiny thumbnails
|
||||
img = Image.open(io.BytesIO(jpeg_data))
|
||||
# Only consider reasonably sized thumbnails
|
||||
if img.width >= 32 and img.height >= 32:
|
||||
thumbnails_found.append((img, img.width * img.height))
|
||||
except Exception:
|
||||
pass
|
||||
|
||||
pos = jpeg_end + 2
|
||||
|
||||
# Look for PNG signatures as well
|
||||
pos = 0
|
||||
while True:
|
||||
# Find next PNG signature (89 50 4E 47)
|
||||
png_start = data.find(b'\x89PNG', pos)
|
||||
if png_start == -1:
|
||||
break
|
||||
|
||||
# Find PNG end (IEND + CRC)
|
||||
png_end = data.find(b'IEND', png_start)
|
||||
if png_end == -1:
|
||||
pos = png_start + 1
|
||||
continue
|
||||
|
||||
# Extract PNG data (include 8 bytes after IEND for CRC)
|
||||
png_data = data[png_start:png_end + 8]
|
||||
|
||||
try:
|
||||
if len(png_data) > 100: # Skip tiny thumbnails
|
||||
img = Image.open(io.BytesIO(png_data))
|
||||
if img.width >= 32 and img.height >= 32:
|
||||
thumbnails_found.append((img, img.width * img.height))
|
||||
except Exception:
|
||||
pass
|
||||
|
||||
pos = png_end + 8
|
||||
|
||||
# Return the largest/highest quality thumbnail found
|
||||
if thumbnails_found:
|
||||
# Sort by pixel count (area) and return the largest
|
||||
thumbnails_found.sort(key=lambda x: x[1], reverse=True)
|
||||
best_thumbnail = thumbnails_found[0][0]
|
||||
|
||||
# Basic quality filter - prefer thumbnails that are reasonable sizes
|
||||
if best_thumbnail.width >= 96 or best_thumbnail.height >= 96:
|
||||
return best_thumbnail
|
||||
|
||||
return None
|
||||
|
||||
except Exception as e:
|
||||
print(f" -> Error reading thumbcache database: {e}")
|
||||
return None
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
sys.exit(main())
|
||||
|
||||
Reference in New Issue
Block a user