Legacy ImageMagick Discussions Archive

I open a GitHub issue here https://github.com/ImageMagick/ImageMagick/issues/1489

ImageMagick cannot do that either. But I think the best practice may to default to use 8 bit depth like BPG does and also enable the user to change the bit depth from 8 to maybe 12 using -depth argument.

I upload the image to a free hosting website.
https://ibb.co/BwxFQZ4
I think you can use bpgenc -b 12 tmp.png to reproduce the error
or use magick tmp.png tmp.bpg
If you change the line at delegate.xml from -b 12 to -b 8 or just use bpgenc tmp.png (default bit depth for bpgenc is 8. It will work.

I find the problem is that the PNG image I try to encode with BPG cannot be encoded with 12 bit-depth. I use bpgenc tmp.png. It works, but if I use bpgenc -b 12 tmp.png, it raise Segmentation Fault. The delegate file acutually default BPG bit-depth to 12 and cannot be changed with -depth argument ...

Normally, how does IM detect if I instal bpg or not?
The bpg program is just binary files extracted from zip. If I do not add them to the system path, I dont think IM will know I install them.

Is my installation process correct?
I cannot interpret the error msg.

Actually, I have a 7.0.8.27 installed and it works fine.
Could you help me reproducing this error because I dont want to lose the 27 version installation on the other PC? I do not have 27 version installer either.

I try to use BPG on ImageMagick (Windows 64 ImageMagick-7.0.8-28-Q16-x64-dll.exe) I install bpg first I download bpg-0.9.8-win64.zip from BPG website and extract it and add to the system path. I assure I can do bpgenc on command line. Then I install ImageMagick. I then try command magick tmp_0.png ...

Got it Thank you.

I open an issue here https://github.com/ImageMagick/ImageMagick/issues/1378
I guess I need to use other implementations for now.

So what I should do now? Report issue at GitHub and use native or other BPG converter?

I am a new user of ImageMagick. I download and install the newest version ImageMagick-7.0.8-14-Q16-x64-dll on Windows. I try to convert a png file to bpg file. The png file is 199KB but the converted bpg file is 255KB. No matter what quality I set, the size is huge and PSNR is Inf(seems lossless ...