preview-tui: image preview with libsixel not working for some images

[Giessen]

Environment details

• Operating System: wsl2
• Desktop Environment:
• Terminal Emulator: Windows Terminal (preview v1.22.3232.0)
• Shell: ZSH
• Custom desktop opener (if applicable):
• Program options used: NNN_PREVIEWIMGPROG='img2sixel' NNN_PLUG='i:preview-tui' nnn -a -i -Pi
• Configuration options set:
• Plugins are installed: preview-tui
• Issue exists on nnn master

Exact steps to reproduce the issue

1.install libsixel
sudo apt-get install libsixel-bin
2.test libsixel
img2sixel -g bird.jpg => ok
img2sixel -g voyage.jpeg => ok
3.compile tmux (v next-3.6) with sixel support and install
git clone https://github.com/tmux/tmux.git
cd tmux
sh autogen.sh
./configure --enable-sixel
make
sudo make install
3.run nnn, open preview-tui pane, navigate to the testing images (bird.jpg, voyage.jpeg, attached bellow)
bird.jpg is ok.
voyage.jpeg shows nothing!!!

Any ideas, please? Thanks a lot.

[Giessen]

testing images.zip

[N-R-K]

2.test libsixel
img2sixel -g bird.jpg => ok
img2sixel -g voyage.jpeg => ok

Did you test this within tmux or without?

[j4james]

By default tmux has a maximum image size of 1 MB (see tmux/tmux#3726), and voyage.jpeg is close to 4 MB once you convert it to sixel. The good news, though, is that tmux recently added an option for changing that limit if you want to make it higher. I don't think that option is included in the current release, but you could always build it yourself if you're desperate.

[N-R-K]

If it's an issue with tmux, then there's nothing to do on our end. Closing.