Preview Thumbnails generated incorrectly for a specific set of files

[Manujito]

Hi, I recently discovered an issue with preview thumbnails being generated incorrectly, for a specific set of files.

I have a few movies in my library that are encoded by the same third party. I don’t know the encoder settings or software, but they all come from the same “place”, basically.

The issue is that preview thumbnails show the same frame throughout the movie, typically the intro credits/logos.

The weird thing is that I thought some of these files were exempt from this issue, but they just had previews generated before this bug came around, since I recently updated a file that was working fine (I just changed some subtitles) and now the newly generated previews present the same problem.

The server attemps to generate the previews, but it clearly has some issue with this type of file, since it shows a sliver of the yellow progress bar for the longest time, and then ends it abruptly:

I can provide some samples if needed, or more information (maybe via PM) but I would love to keep using these versions without this annoying glitch.

Server Version#: 1.26.0.5715 (it’s an ongoing issue from a while ago)
Player Version#: Any

[Volts]

Try setting GenerateBIFKeyframesOnly → 0.

Thumbnail Previews (Roku & iOS) not displaying on 1080P HEVC content / 720P HEVC content and 480P content works

In the Media Info for these items, I assume that “Indexes sd” isn’t present? [image] Yes, Plex can generate video preview thumbnails for HEVC content. It does so by extracting keyframes from the video. There are a few scenarios where unusually encoded videos can prevent this process from succeeding. If you’d like to share a sample file with me, I can confirm or deny that it’s related to the file encoding. Alternatively, you can try changing a hi…

I’m optimistic this will help, but I’d also like to see a sample - repeating the same frame is a different symptom.

[Manujito]

I already tried that a few months ago after searching and finding a similar topic, but thank you anyway. I might give it another go, you never know, but this might be a different issue.

EDIT: just tried again, and this time correctly (last time I didn’t change the registry) and it finally worked. It’s not a setting I can keep forever, since it’s a waste of time and power, but I can go through all of these specific files and then disable it.

Thanks again for the quick reply, saved me a lot of headache.