ThumbnailCity / Known bugs

2019-08-19
2026-10-10
 COMVIC

Known bugs for ThumbnailCity Version 1.3.11 and Version 2.1.9 are followings. Click on the underlined line to expand the content.

If you specify a thumbnail using the embed feature from the preview, ThumbCityPV.exe may prevent your PC from logging off or restarting.
  • This issue is a bug in ThumbnailCity that occurs in Version 2.1 and later.
  • If your PC is prevented from logging off or restarting, it is safe to force-close ThumbCityPV.exe.
  • This bug is scheduled to be fixed in the Version 2.2 series.
When deleting jecket photo with thumbnail or bookmark specified while Emb=On in the Viewer, an error such as ERROR-003 appears and the Viewer closes.
  • This is a bug that occurs in ThumbnailCity Version 2.
  • To avoid this bug, remove the thumbnail and bookmark associated with the jacket photo before deleting the jacket photo itself.
  • This bug will be fixed in Version 2.2.
Viewers and sandbox processes may cause app errors with certain videos.
  • This problem is a ThumbnailCity’s bug that occurs in Version 1 and Version 2.
  • It had been fixed in Version 1.3.11 and Version 2.1.11.
In case of using DirectShow, when a mp4 container video which has the non-unit matrix display attribute (tkhd’s matrix) is displayed in the Viewer, the Preview, or generated thumbnails or bookmarks the display attribute is ignored.
  • This problem often occurs with videos with rotation attributes taken on mobile devices and other devices.
  • This problem is a ThumbnailCity’s bug that occurs in Version 1 and Version 2.
  • This does not occur when using MediaFoundation or libVLC.
  • It had been fixed in Version 1.3.11 and Version 2.1.8.
When a thumbnail or bookmarks are specified for the movie that frame size changes during playback and then displayed by the WMP Plugin, the images are not displayed.
  • This failure is a bug of ThumbnailCity.
  • It had been fixed in Version 1.3.11 and Version 2.1.3.
Thumbnails in the folder are not updated when you specify thumbnails by the Viewer.

The causes and action are as follows.

  • In case of the registry is overwritten by other software
    • Typical such a softwares are Icaros and K-Lite codec pack, etc. This problem occurs when you install/uninstall these software or change their settings.
    • In case of this, “Thumbnail function” of “System settings” for the relevant extension is turned off. “System settings” can be start from start menu.
    • You can recover by changing the “Thumbnail function” that is OFF in “System Settings” to ON.
  • In case of the function is suppressed by antivirus software(security software)
    • In this case, some kind of warning is often displayed by the antivirus software.
    • In this case, refer here.
The Viewer or ThumbCitySB.exe may display the “ACCESS_VIOLATION…” dialog and then close.
  • This issue is caused by a problem with either the linked program or ThumbnailCity.
  • The following third-party programs have been confirmed to have caused this issue in the past. If the module name matches the name displayed in the dialog, please update the relevant product (third-party program) to the latest version.
      Product NameModule Name
      Media PreviewVideoPreview.dll
      Logitech Webcam Softwarelvcod64.dll
      IcarosIcarosThumbnailProvider.dll, IcarosCache.dll
      NahimicOSD audio driversNahimicOSD.dll
      Bandisoft DirectShow Filterbdfilters64.dll
      BlackBerry Linkmc_demux_mp4_ds.ax
      ATOKATOK31TIP.dll
      FFmpeg (including the version bundled with Icaros)avcodec-ics-xx.dll, avutil-mp-xx.dll
      VLC Media PlayerVSFilter64.dll
      Microsoft DTV-DVD Video Decodermsmpeg2vdec.dll

If you see any warnings or errors, please also refer to the FAQ.

If you find any troubles / bugs other than the above, please notify us (refer contact information in readme).

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