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Jedidiahin's avatar
Jedidiahin
Iron Contributor
Jun 16, 2025

Slow loading of black video thumbnails in MS Windows Explorer

I'm more curious as to why this might be happening rather than looking for an actual fix (because I don't think there would be one)....

I offload the video files from my dashcam's SD card to my computer every few days in case I need them at a later date. To save HDD space, I delete all the blank video files (video files that have been captured at night time with no content).

I've noticed that the thumbnails for these "blank" video files take significantly longer to load than the videos which contain action.

Is there a logical reason behind this?

1 Reply

  • VaughnRamsey's avatar
    VaughnRamsey
    Iron Contributor
    Jun 19, 2025

    If the "blank" videos are encoded differently (e.g., with less efficient compression or different codecs), the thumbnail extraction process might take longer because Windows has difficulty decoding or locating a suitable frame rapidly.