BC1 srgb to BC1

[revcarl]

Hi I don't have a lot of experience with textures but I am doing my best to figure it out. I hope you can bear with me, I will try to give as much detail as I can. I am actually using this tool for modding purposes and it is great. What I am trying to do is convert a BC1 4bpp (sRGB DX10+) dds image to a BC1 4bpp (Linear) dds image. I am doing this because photoshop seems to be the only program that can open the first dds file and I just don't have the money for it. I am able to convert the image and have it work on paint.net but when I convert it back the image is lighter than it originally was. It is making me think that some of the dds files information is being lost in the process that you can't get back. Is this the case or is there a different reason for this happening?
Thank You for any help, RevCarl

PS this is what I am using to convert them:
texconv -f BC1_UNORM -srgbi -if LINEAR "C:\Users\kyle\Downloads\Arkham knight\Mods\resorep\retrieved textures\*.dds"
Then Back:
texconv -f BC1_UNORM_SRGB -srgbo -if LINEAR -bcdither "C:\Users\kyle\Downloads\Arkham knight\Mods\resorep\retrieved textures\Black and grey\DXGI_FORMAT_BC1_UNORM_SRGB\new\*.dds"

[walbourn]

If the original source image is encoded as DXGI_FORMAT_BC1_UNORM_SRGB, then the first line converted it to a DXGI_FORMAT_BC1_UNORM (which can be encoded with a legacy DDS header) after converting the content to a non-sRGB (i.e. linear) form. The -srgbi is redundant if the original format was explictily an sRGB DXGI_FORMAT.

If you wanted to do the original conversion without modifying the color-space, then you'd use:

texconv -f BC1_UNORM -srgbo "C:\...\*.dds" 

For the second line, if your input source is a DXGI_FORMAT_BC1_UNORM, then by specifying BC1_UNORM_SRGB it would perform a color-space conversion. The -srgbo again is redundant becuase the output is an explicitly sRGB DXGI_FORMAT. If you want to avoid a color-conversion, you'd use -srgbi.

-if LINEAR isn't relevant as that's for resizing the image or generating mipmaps.

[revcarl]

Thank You :) I just tried it and it and what you said worked like a charm. I am going to try it in the game when I get time. If it works it should make a lot of people happy.