Frequently asked questions (FAQ)

About operation

  • Start the viewer from the folder’s context menu. Refer usage page for details. For V1 here, for V2 here.

  • Press F1 to display keyboard instruction.

About feature

  • You can do this using the embed feature. For other cases, please refer to this TIPS.

  • Since the specification by ThumbnailCity does not clear, it takes time to redisplay the thumbnails for the first time, but the specified thumbnail will be displayed. No need to re-specify.

  • Turn off the OneDrive files-on-demand feature. When the files-on-demand feature is ON, Explorer displays thumbnails generated on the cloud side, so the ThumbnailCity function is not used. This feature can be turned ON / OFF by right-clicking the OneDrive icon in the task tray -> setting -> setting tab.

  • Frame caching is a function that caches a frame (image) that has been displayed once, and then retrieves it from the cache and quickly displays it the next time the frame at that position is displayed.
  • However, if a frame is moved during frame retrieval processing (when the mouse cursor is in a waiting state), the retrieval process is canceled and processing to retrieve the moved frame is started, so the frame is not cached. In other words, if you perform an operation after the screen changes, it will be cached, but if you perform the operation before the screen changes, it will not be cached.

About error and warning

  • An error has occurred due to the movie cannot be decoded with Media Foundation, Direct Show and libVLC.
  • If the movie is AVC or HEVC and has a pixel bit depth of 10 bits, you may be able to decode it by applying this tool. For details, please refer to the readme included with the zip file.
  • In addition, for AVC-encoded FLV movies, you can generate the thumbnail by enabling the “FLV Media Source” which is bundled in ThumbnailCity. To enable “FLV Media Source”, do “Modify” in “Apps & features” or do “Modify” from the installer.
  • If you are using Version 2 or later, you may be able to decode with libVLC, which is bundled in VLC Media Player.
  • Other cases above, it is necessary to install a Media Source or Splitter for the container which you want to play. Also Decoder or Rendering filter is required which suit to encoded data you want to play. Check container and encode type which you want to play by using “MediaInfo”, etc, then install codec-pack, other software which be able to play container and encode data.
  • In order to specify a thumbnail for movie file other than mp4 container, the media containing the file must be formatted with NTFS or ReFS. FAT etc. are not supported.
  • This message appears when you try to copy or move a movie file to media that is not formatted with NTFS or ReFS when a thumbnail or bookmarks are specified for the movie without using the embedding feature, or when ADS cache is enabled.
  • If you try to copy or move a movie file with thumbnail or bookmarks specified without using the embedding feature, the thumbnail or bookmark informations will not be reflected in the copy or move destination.
  • In cases other than the above, no particular harm will occur.
  • This error occurs when you manually move / rename or delete file(s) located in the ThumbnailCity installed folder. It will be fixed if you restore the file(s) to its original location.
  • You may be using a non-official version of ThumbnailCity. Alpha versions, beta versions, RC versions, etc. other than official release versions may contain defects, so an expiration date has been set. Please check the version you are using from the readme, etc., and install the latest release version if necessary.
  • If you got ThumbnailCity through official site, this is a false positive from your antivirus software. To avoid this, refer here.

About license

  • When purchasing online via PayPal, you can pay using your bank account or debit card registered with PayPal.

  • The email is sent automatically immediately after the purchase process is completed, usually within a few minutes.
  • Please check to see if the email has been sorted into a spam folder or other folder. We are experiencing cases of emails being sorted into the spam folder, especially in Gmail.
  • Please make sure that the email address you have registered with PayPal is available to receive your message. If your email address is not available, please contact us at the contact information provided in the readme, even if it is from a different address.
  • If none of the above apply, please contact us at the contact information provided in the readme.

Other questions

If you have any other questions, please write them in the comments section and we will answer them.

  • There is no need to fill in the name and email fields.
  • Comments and spam unrelated to product questions will be deleted.
  • If there is a large amount of spam, etc., we may stop collecting questions without prior notice.
  • Questions and answers will be moved to the FAQ as necessary.

6 Comments

  • 管理者によるコメントのテスト
    コメントは、こんな感じに表示されます。
    管理者による承認は不要にしています。
    名前, メールアドレス, ウェブサイト欄の入力は不要です。

  • 試用期間が過ぎましたと出るがライセンスは認証済みと出て使えないみたいです。
    登録は
    xxx@gmail.com [mailAddressは伏せさせて頂きました]
    かもしれません。

    • 上記FAQの「エラーや警告について」の「ライセンスキーを登録済みであるにも係わらず…」には該当しないでしょうか? アルファ、ベータ、RC版はreadme.txtにその旨を記載してあります。readme.txtはスタートメニュから開くことができます。
      該当しない場合は、不具合の可能性が高いので、お手数ですがreadme.txtの11に記載している方法でログを取得頂き、当方まで提供お願いします。

  • ThumbnailCity Version 2.0.11 RC6
    Copyright (C) 2016, 2023, Akey/COMVIC, All Rights Reserved
    でしたが、再インストールすれば良いのでしょうか?
    検索するとfree版が出てきますが、それで認証すれば良いのでしょうか?

    • 以下URLのページの「ダウンロードリンク」から、お使いのOSと同じビットバージョンのシェアウェア版をダウンロードし、インストールしてください。既にインストールされているRC6版をアンインストールする必要はありません。
      http://local.comvic.mydns.jp/thumbnailcity/

  • ありがとうございました。修正出来た様です

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