{"record":{"id":"2bd0adc18e364626","repo":"Yalantis/uCrop","slug":"save-other-file-s-saving-a-volumetric-image-2bd0ad","errorCode":null,"errorMessage":"save_other(): File '%s', saving a volumetric image with an external call to ImageMagick or GraphicsMagick only writes the first image slice.","messagePattern":"save_other\\(\\): File '(.+?)', saving a volumetric image with an external call to ImageMagick or GraphicsMagick only writes the first image slice\\.","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"ucrop/src/main/jni/CImg.h","lineNumber":63886,"sourceCode":"       \\param filename Filename, as a C-string.\n       \\param quality Image quality (expressed in percent), when the file format supports it.\n       \\note\n       - The filename extension tells about the desired file format.\n       - This method tries to save the instance image as a file, using external tools from\n       <a href=\"http://www.imagemagick.org\">ImageMagick</a> or\n       <a href=\"http://www.graphicsmagick.org\">GraphicsMagick</a>.\n         At least one of these tool must be installed for the method to succeed.\n       - It is recommended to use the generic method save(const char*, int) const instead,\n         as it can handle some file formats natively.\n    **/\n    const CImg<T>& save_other(const char *const filename, const unsigned int quality=100) const {\n      if (!filename)\n        throw CImgArgumentException(_cimg_instance\n                                    \"save_other(): Specified filename is (null).\",\n                                    cimg_instance);\n      if (is_empty()) { cimg::fempty(0,filename); return *this; }\n      if (_depth>1)\n        cimg::warn(_cimg_instance\n                   \"save_other(): File '%s', saving a volumetric image with an external call to \"\n                   \"ImageMagick or GraphicsMagick only writes the first image slice.\",\n                   cimg_instance,filename);\n\n      const unsigned int omode = cimg::exception_mode();\n      bool is_saved = true;\n      cimg::exception_mode(0);\n      try { save_magick(filename); }\n      catch (CImgException&) {\n        try { save_imagemagick_external(filename,quality); }\n        catch (CImgException&) {\n          try { save_graphicsmagick_external(filename,quality); }\n          catch (CImgException&) {\n            is_saved = false;\n          }\n        }\n      }\n      cimg::exception_mode(omode);","sourceCodeStart":63868,"sourceCodeEnd":63904,"githubUrl":"https://github.com/Yalantis/uCrop/blob/f788b534b48c144edf786c8cddbf0e029e637804/ucrop/src/main/jni/CImg.h#L63868-L63904","documentation":"Generic save_other() path: when neither native codecs nor a specific external wrapper applies, CImg shells out to ImageMagick or GraphicsMagick; for volumetric images (_depth>1) only the first slice reaches the external tool, so the rest of the volume is dropped. CImg warns via cimg::warn() and the save continues.","triggerScenarios":"Calling save_other() (or save() with a format resolved to save_other) on an image with _depth>1 when CImg has no native codec for the extension and falls back to the external ImageMagick/GraphicsMagick binary.","commonSituations":"Saving multi-slice data to formats like BMP/GIF/JPEG on builds without cimg_use_* flags; environments where only command-line ImageMagick is available; misconstructed images with accidental depth dimension.","solutions":["Compile with the appropriate cimg_use_* macro so the native in-process codec handles the format","Iterate slices and save each one separately","Use save_cimg() or save_tiff() for volumetric data","Verify image dimensions: fix constructor argument order if depth>1 is unintended (CImg(w,h,1,c))"],"exampleFix":"// before\nvolume.save(\"out.bmp\");             // external tool fallback, only slice 0\n// after\nfor (int z = 0; z < volume.depth(); ++z)\n  volume.get_slice(z).save_bmp(cimg::format(\"out_%03d.bmp\", z));","handlingStrategy":"validation","validationCode":"if (img.depth() > 1)\n  for (int z = 0; z < img.depth(); ++z) img.get_slice(z).save(cimg::format(\"out_%03d.bmp\", z));\nelse\n  img.save(\"out.bmp\");","typeGuard":"bool is_2d(const cimg_library::CImg<T>& img) { return img.depth() == 1; }","tryCatchPattern":"try { img.save(\"out.bmp\"); } catch (CImgException& e) { /* handle */ }","preventionTips":["Enable native codec macros at build time to avoid the save_other external fallback","Never save _depth>1 images through external-tool formats","Use save_cimg()/save_tiff() for volumetric data"],"tags":["cimg","imagemagick","graphicsmagick","volumetric","data-loss"],"backgroundTag":"unsupported-operation","analyzedSha":"f788b534b48c144edf786c8cddbf0e029e637804","analyzedAt":"2026-09-08T08:36:04.887Z","contentChangedAt":"2026-09-08T08:36:04.887Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}