Linux: NetVips.VipsException: unable to write to buffer VipsForeignSave: "��G��" is not a known buffer format

[BurtonShane]

Hi,
I am unable to use Image.WriteToBuffer() in a Linux Docker image.

I'm passing in the extension like shown in the documentation:
imageBytes = img.WriteToBuffer(".png");

This works perfectly fine when running in Windows, but in Linux it throws an exception like "NetVips.VipsException: unable to write to buffer VipsForeignSave: "�� p��" is not a known buffer format".

Tested in both Ubuntu and Alpine Docker images, using the same libvips install/build steps as from here

Image.WriteToFile() works in Linux, but i'd prefer not to have to save things to temp files if i can avoid it

[kleisauke]

Hi Shane,

Thanks for reporting this bug! It's fixed with d96fab4 (it was due to a string pointer which was freed too early).

I've also added a unit test to ensure that this will never happen again. I'll publish a new version (1.0.4) on NuGet today.

[kleisauke]

NetVips 1.0.4 is now available on NuGet.

[BurtonShane]

Thanks for the quick fix! I tested and can confirm its working now