No video preview thumbnails

[HawaiianPizza]

Nextcloud version: 20.0.7
Operating system and version: Ubuntu 20.04.2 LTS on Raspberry Pi 4

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None of my videos uploaded onto my Nextcloud (installed via Docker-Compose) are showing any thumbnails. Images (GIF, JPEG, PNG) are fine and thumbnails are generated. However, it's not the same for videos.

I've attached an image of how my videos look like.

[DatAres37]

What makes you think that Nextcloud generates video thumbnails? There are no video thumbnails on the official Nextcloud demo for me.

[J0WI]

Video preview thumbnails require FFmpeg: https://github.com/nextcloud/docker/tree/master/.examples#ffmpeg

[fstani]

What makes you think that Nextcloud generates video thumbnails? There are no video thumbnails on the official Nextcloud demo for me.

As @J0WI pointed out it does support generating video thumbnails if you have FFmpeg installed, my suggestion would be to have a full version of nextcloud with that pre-installed if possible.
But that aside, we can just create our own Dockerfile and upload to dockerhub, you can either grab the full example and just build and upload or create one with just FFmpeg.

FROM nextcloud:apache

RUN set -ex; \
    apt-get update; \
    apt-get install -y ffmpeg; \

CMD ["apache2-foreground"]

My guess is something like that should work

[fstani]

If you want to test you can also just drop in the shell in your container, and install FFmpeg manually

You will also need to add this:

'enable_previews' => true,
  'enabledPreviewProviders' =>
  array (
    0 => 'OC\\Preview\\TXT',
    1 => 'OC\\Preview\\MarkDown',
    2 => 'OC\\Preview\\OpenDocument',
    3 => 'OC\\Preview\\PDF',
    4 => 'OC\\Preview\\MSOffice2003',
    5 => 'OC\\Preview\\MSOfficeDoc',
    6 => 'OC\\Preview\\Image',
    7 => 'OC\\Preview\\Photoshop',
    8 => 'OC\\Preview\\TIFF',
    9 => 'OC\\Preview\\SVG',
   10 => 'OC\\Preview\\Font',
   11 => 'OC\\Preview\\MP3',
   12 => 'OC\\Preview\\Movie',
   13 => 'OC\\Preview\\MKV',
   14 => 'OC\\Preview\\MP4',
   15 => 'OC\\Preview\\AVI',
 )

To your config.php

[boombatower]

Any chance a ffmpeg/video or full variant can be provided as a tag similar to alpine? I imagine video previews is a rather common desired feature.

[fstani]

I would also rather just use a package from the maintaner rather than having to build my own, but @boombatower I'm going to build one and put it on dockerhub, since I'm using it as well 😄

[boombatower]

I built such an image (just install ffmpeg on base production image). Could do it fancy and mimic all the tags with ffmpeg, but... I think the new repository linking does not work properly for official images like it used to so I'll probably have to setup a trigger to rebuild it.

Would much prefer and official image.

[rosalinamia3]

Hi to all,
i am new in here.
I am sorry but I have the same problem too.
No video previews.
I have asked my server provider to install ffmpeg as I have no root privileges.
Nothing has changed. All the videos uploaded before and after the ffmpeg installation have no previews.
I have also added a cron job /public_html/occ preview:pre-generate -vvv but nothing happened.
I have installed the app Preview Generator and follow their instructions:
"The first time you install this app, before using a cron job, you properly want to generate all previews via: ./occ preview:generate-all -vvv

Important: To enable pre-generation of previews you must add php /var/www/nextcloud/occ preview:pre-generate to a system cron job that runs at times of your choosing."
But nothing happened.
Do you have any suggestions?
Is there a chance to have a support for this issue? Is this a problem that it will show up on every nextcloud installation?
Thanks in advance for your support.
Regards

[J0WI]

I have asked my server provider to install ffmpeg as I have no root privileges.

This issue is only for the Docker image.

You should to compare your enabledPreviewProviders with #1432 (comment).

[rosalinamia3]

Hi @J0WI,
thanks for your reply.
I have already in my config.php file following:
'enable_previews' => true,
'enabledPreviewProviders' =>
array (
0 => 'OC\Preview\TXT',
1 => 'OC\Preview\MarkDown',
2 => 'OC\Preview\OpenDocument',
3 => 'OC\Preview\PDF',
4 => 'OC\Preview\MSOffice2003',
5 => 'OC\Preview\MSOfficeDoc',
6 => 'OC\Preview\Image',
7 => 'OC\Preview\Photoshop',
8 => 'OC\Preview\TIFF',
9 => 'OC\Preview\SVG',
10 => 'OC\Preview\Font',
11 => 'OC\Preview\MP3',
12 => 'OC\Preview\Movie',
13 => 'OC\Preview\MKV',
14 => 'OC\Preview\MP4',
15 => 'OC\Preview\AVI',
)
What I have found out since now is. I am on a shared hosting server and also nextcloud app Preview Generator works fine but creates only image previews not video previews.
I believe the only ffmpeg creates video previews but I do not know where ffmpeg creates thumbnails (path) and what is the ssh comand to let ffmpeg generates all previews.
hope you can help

[rosalinamia3]

I have run this comand:
/home/st9284/ffmpeg/ffmpeg -version
ffmpeg version N-53260-ga37109d555-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
libavutil 56. 55.100 / 56. 55.100
libavcodec 58. 92.100 / 58. 92.100
libavformat 58. 46.101 / 58. 46.101
libavdevice 58. 11.100 / 58. 11.100
libavfilter 7. 86.100 / 7. 86.100
libswscale 5. 8.100 / 5. 8.100
libswresample 3. 8.100 / 3. 8.100
libpostproc 55. 8.100 / 55. 8.100

what is Docker?

[J0WI]

Nextcloud expects th ffmpeg in one these directories: https://github.com/nextcloud/server/blob/v21.0.1/lib/private/legacy/OC_Helper.php#L469

Please use https://help.nextcloud.com/ for arbitrary questions.

I'm closing the issue, because the initial cause was already solved in #1432 (comment)

[boombatower]

@J0WI Do we need to open another issue then for providing a container image flavor with ffmpeg installed?