Hi, I have issues with the generation of video preview thumbnails for some movies. For most movies it works just fine, but some (about 5) the following behavior can be observed: when triggering “Analyze” manually, there is no spinning activity wheel which normally indicates the progress of previe…

I have yes, I primarily have REMUX quality files, and it often fails as you have described. I have also tried repackaging them with mkvtoolnix, didn’t change the outcome.

Okay interesting… I also have many Remux files, but the mkv’s that don’t work for me are all h264/x264 encodes. Here is the video codec information metadata copied from Plex from such a file: Codec H264 Bitrate 8541 kbps Language Deutsch Bit Depth 8 Chroma Location left Chroma Subsampling 4:2:0 Co…

Been having the same issue for quite a while now. I usually put all my movies in an MP4 container, but same thing. Some generate thumbnails just fine, while others fail with the same type of error message. I’m encoding the movies with the same program and output settings. There’s no real pattern…

I have the same error message, server # 1.19.5.3035

I’m just moving to Plex from Emby and while everything else is fine, I’m finding this error too on certain files. I’m running on a Linux Docker installation, but I’ve also tried the Windows server, with the same results. I think I’ve narrowed it down. Most of my TV programmes are ripped from my DV…

Thank you very much for pinpointing the issue. Maybe someone of the dev team could have a look into this? :slight_smile:

Okay, I think I’ve narrowed it down further and found the problem, in my case at least. When you encode to H264 format, you can choose to output as “Closed GOP” or “Open GOP”. GOP stands for “Group of Pictures” and it’s something to do with the way that various compression frames are arranged. Some…

Whatever’s going wrong, I don’t think it’s as simple as open_gop=1. Can you create and share a partial file that exhibits this problem? I just encoded a file with open_gop=1. I put it in plex. Video preview thumbnails were generated successfully. Encoding settings : cabac…

index-sd.bif generation happens in two main steps, I believe. First the Transcoder, Plex’s fancy version of FFmpeg, is used to extract a bunch of jpeg stills from the movie. Then those are splatted together into the index-sd.bif file. The command Plex uses to extract thumbnails looks a lot like thi…

Video Preview Thumbnail Generation Fails for Some Items

Plex Media Server

f18cc June 30, 2020, 5:21pm 4

Here’s the mediainfo for a REMUX file I have that doesn’t work:

failed_bif.txt (13.7 KB)

Plex stuck on creating thumbnails (FFmpeg issue)

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Video Preview Thumbnail Generation Fails for Some Items

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