Thumbnails are not generated after trimming a clip

[T3ch5]

After trimming any video, that video will no longer have a thumbnail.

Steps to reproduce the behavior:

1. Trim any video
2. Wait for it to process
3. Refresh the page
4. Missing thumbnail for trimmed videos

I expected a new thumbnail to be generated after trimming within Fireshare

Running in a container on ZimaOS. Accessed from web GUI in Vivaldi browser

[ShaneIsrael]

Can you show me the fireshare logs that happen after you attempt to trim a video. Also please share your docker settings for the app (minus any credentials/keys).

[T3ch5]

user@ZimaOS:~ ➜ $ sudo docker logs joyful_dominic-main_app-1 --tail 20
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[out#0/mp4 @ 0x5612b575da40] video:6951kB audio:148kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.221298%
size= 7116kB time=00:00:06.85 bitrate=8505.5kbits/s speed=9.72x
2026-04-19 19:26:31,685 INFO util.create_video_crop:401 | Created crop /processed/derived/ddf2aa9a2f46e1dfe84a8366ce5d8c38/ddf2aa9a2f46e1dfe84a8366ce5d8c38-cropped.mp4 (start=6.18, end=13.04)
INFO:fireshare:Created crop /processed/derived/ddf2aa9a2f46e1dfe84a8366ce5d8c38/ddf2aa9a2f46e1dfe84a8366ce5d8c38-cropped.mp4 (start=6.18, end=13.04)
DEBUG:fireshare:$ ffmpeg -v quiet -y -i /processed/derived/ddf2aa9a2f46e1dfe84a8366ce5d8c38/ddf2aa9a2f46e1dfe84a8366ce5d8c38-cropped.mp4 -ss 0 -vframes 1 -vf scale=iw:ih:force_original_aspect_ratio=decrease /processed/derived/ddf2aa9a2f46e1dfe84a8366ce5d8c38/poster.jpg
DEBUG:fireshare:Generated poster /processed/derived/ddf2aa9a2f46e1dfe84a8366ce5d8c38/poster.jpg in 0.7208294868469238s
2026-04-19 19:26:35,935 INFO scan.get_folder_suggestions:156 | Loaded suggestions file, keys: 17
INFO:fireshare:Loaded suggestions file, keys: 17
2026-04-19 19:26:35,935 INFO scan.get_folder_suggestions:158 | Returning 0 folder suggestions: []
INFO:fireshare:Returning 0 folder suggestions: []
2026-04-19 19:26:39,343 INFO scan.get_folder_suggestions:156 | Loaded suggestions file, keys: 17
INFO:fireshare:Loaded suggestions file, keys: 17
2026-04-19 19:26:39,343 INFO scan.get_folder_suggestions:158 | Returning 0 folder suggestions: []
INFO:fireshare:Returning 0 folder suggestions: []
2026-04-19 19:26:46,960 INFO scan.get_folder_suggestions:156 | Loaded suggestions file, keys: 17
INFO:fireshare:Loaded suggestions file, keys: 17
2026-04-19 19:26:46,960 INFO scan.get_folder_suggestions:158 | Returning 0 folder suggestions: []
INFO:fireshare:Returning 0 folder suggestions: []

Docker settings.txt

Hopefully nothing compromising there, thanks.

[ShaneIsrael]

From the logs, the thumbnail image was created without issue. In your browser, open up the developer tools panel and view the web console. Then refresh the page. Do you see any errors in the web console or in the network tab? I'm wondering if you have something in your network or reverse proxy settings that could be blocking the frontend from loading the thumbnail images.

I don't see anything obviously wrong with your docker settings.