go to tools -> Synchronize first then go to plugin jsvideo settings and syncronize

I met all these requirements and have also successfully synchronized, with no errors. The evidence is that the folder pwg_representative is created and the posters are in there.
That's not the point.
The point is the gallery, that shows a grey thumbnail with an exclamation mark. But if I double click on it, the player shows up correctly, with a still image, and it plays the video.
Please go to this page to see what I mean: https://piwigo.nosotros.ong.br/index.php?/category/9

I did it, still no good, nothing changed.

It might be a codec problem also. try reencode the mp4

No success.
Just to describe what I did.
1) While the container was running, I logged into the container: docker exec -it piwigo bash
2) Then I changed directory to: /app/www/public/_data
3) Then I removed the i folder: rm -r i
4) Then I synchronized in videojs;
5) Then I synchronized in Tools -> Synchronize

As for the codec, I think it isn't the case, since I can play the video, once I double click the reel thumbnail and go to the video page, do you agree?

Uhmm... I'm not sure if it's a permissions thing.
The gallery folder that contains the video shows this:

root@32acda4e55fc:/gallery/galleries/Pre-Visualizacao# ls -la
total 13720
drwxr-x--- 1 abc users     8192 Feb 18 16:51 .
drwxr-x--- 1 abc users     4096 Feb  5 17:47 ..
-rw-r----- 1 abc users 14031408 Jan  1 14:27 20150801_165246.mp4
drwxr-x--- 1 abc users     4096 Feb 20 12:46 pwg_representative

And inside pwg_representative we see this:

root@32acda4e55fc:/gallery/galleries/Pre-Visualizacao/pwg_representative# ls -la
total 136
drwxr-x--- 1 abc users   4096 Feb 20 12:46 .
drwxr-x--- 1 abc users   8192 Feb 18 16:51 ..
-rw-r----- 1 abc users   3855 Feb 19 07:05 20150801_165246-th_0.jpg
-rw-r----- 1 abc users   3776 Feb 19 07:05 20150801_165246-th_10.jpg
-rw-r----- 1 abc users   3837 Feb 19 07:05 20150801_165246-th_15.jpg
-rw-r----- 1 abc users   3671 Feb 19 07:05 20150801_165246-th_5.jpg
-rw-r----- 1 abc users 106659 Feb 20 12:46 20150801_165246.jpg

Just reinforcing what I've said before:
1) The only issue is the gray reel thumbnail in the gallery (https://piwigo.nosotros.ong.br/index.php?/category/9)
2) If I double click that thumbnail, a new page correctly shows the player, exhibiting a still from the video. If I  start it, the video plays without issue

What I'm looking for is fixing #1 above.

EDIT: In case it isn't usual, the abc
user is the default user in this docker container.

EDIT2: Anyway, thanks for the script!

Last edited by gadolf (2023-02-22 18:56:44)

When importing short videos (1-2 second clips from a phone, for example), I found that I had to edit admin/include/functions_upload.inc.php to comment out this line:

$ffmpeg.= ' -ss '.$second;  // Fast seeking

The issue seems to be that an offset within 0-0.2 seconds (approx) of the end of the video fails.

Commenting out this line means the poster is generated from the start of the video.

I did not manage to fix plugins/piwigo-videojs/include/function_sync.php to address this issue in re-syncs. It still eludes me. Search for the bits that refer to $sync_options['postersec'].