Green video thumbnails on nautilus

Wed Jan 30, 2019 · 144 words

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How to fix green thumbnails on .mkv videos

• First install ffmpeg and ffmpegthumbnailer

On Ubuntu:

1. Enable universe and multiverse repos on software app.

2. Update: sudo apt update

3. Install restricted extras: sudo apt-get install ubuntu-restricted-extras

4. Finally install ffmpeg and ffmpegthumbnailer: sudo apt install ffmpeg ffmpegthumbnailer

On Debian: sudo apt install ffmpeg ffmpegthumbnailer

On Arch and derivatives: sudo pacman -S ffmpeg ffmpegthumbnailer

• Second remove thumbnail folder: rm -r ~/.cache/thumbnails

• Third edit totem.thumbnailer file: sudo nano /usr/share/thumbnailers/totem.thumbnailer

Change the value on TryExec with ffmpegthumbnailer.

Change the value on Exec with ffmpegthumbnailer -s %s -i %i -o %o -c png -f -t 10

Finally, the edited lines should look like this:

TryExec=ffmpegthumbnailer
Exec=ffmpegthumbnailer -s %s -i %i -o %o -c png -f -t 10

• Finally restart nautilus: nautilus -q

If the changes don’t apply for all files should be useful removing again the thumbnail folder. rm -r ~/.cache/thumbnails