• Linux Mint How To Set Desktop Background Image From Bash Prompt CLI


    The way of doing it in mint is different than gnome and ubuntu. gsettings set org.mate.background picture-filename /path/to/file.jpg *If you try to use the gnome way it will NOT work with Linux Mint: gsettings set org.gnome.desktop.background picture-uri /some/pic.jpg........
  • ImageMagick Convert PDF Not Authorized


    You'll have to edit the policy.xml file to fix this: convert -density 300 output.pdf agreement.jpg convert.im6: not authorized `output.pdf' @ error/constitute.c/ReadImage/454. convert.im6: no images defined `agreement.jpg' @ error/convert.c/ConvertImageCommand/3044. sudo vi /etc/ImageMagick*/policy.xml #change # ........
  • ImageMagick Converted PDF to JPEG some files have a black background solution


    Use these flags: convert -alpha flatten -alpha remove "output.pdf" ljll.jpg And even the pesky black backgrounds should be gone after converting to jpg........
  • Linux ln symlink how to update existing symbolic link


    ln -s --force newfile.jpg existingsymlink.jpg All you do is use the --force flag to force/update the existing one. The above modifies a symlink called "existingsymlink.jpg" and points it to "newfile.jpg" as the source.........
  • convert.im6: Unknown field with tag 317 (0x13d) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/788.


    convert "file.TIF" "resize.jpg" convert.im6: Unknown field with tag 317 (0x13d) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/788. I've been getting this error in ImageMagick on some .tif files even though it seems to actually convert properly.........
  • ImageMagick How To Convert Specific PDF Pages or a Range


    A very handy feature of ImageMagick's convert command is that it can convert PDF's to other image formats like jpg but did you know you can even manually select a range or specific pages from the PDF? Here is an example of converting a range of pages from a PDF in this case pages 25 to 36: convert -density 300 "vSphere 6.5-1.pdf[25-36]" vsphere.jpg Here is an example of converti........
  • imagemagick convert to chop off top of image


    This is useful if you have a bunch of images/scans where the same area at the top needs to be chopped. Sometimes the -trim option (such as the case of white space on top)is wrong and ends up cropping the image and losing some text. ImageMagick's convert is very useful but tricky to find some things out as I find it to be less than intuitive sometimes. Chopping off the bottom convert -crop -0-400 image.jpg image.pdf........
  • css responsive images


    add this style="background-size: contain;max-width: 100%; height: auto;" to your img code. Example: ........
  • imagemagick pdf convert error solution - **** Warning: can't process font stream, loading font by the name. Can't find CMap Identity-UTF16-H building a CIDDecoding resource. Warning: falling back to Identity ordering **** Error reading a conte


    **** Warning: can't process font stream, loading font by the name. Can't find CMap Identity-UTF16-H building a CIDDecoding resource. Warning: falling back to Identity ordering **** Error reading a content stream. The page may be incomplete. **** File did not complete the page properly and may be damaged. **** This file had errors that were repaired or ignored. ****........
  • use ffmpeg to watermark videos if mencoder/bmovl fail


    If you have this problem: http://realtechtalk.com/mencoder_bmovl_error_vf_bmovl_Unknown_command_Ignoring_-1860-articles Then ffmpeg is for you. Go here if you are using Linux Mint and cannot find or install it to use an external PPA........
  • mencoder bmovl error vf_bmovl: Unknown command: ''. Ignoring.


    Based on this tutorial: http://www.linuxjournal.com/content/overlay-images-video-using-mplayer-and-mencoder mencoder -oac pcm -ovc raw -vf bmovl=0:0:tfifo -o $output $file vf_bmovl: Unknown command: ''. Ignoring. ........
  • Linux Ubuntu Mint how to view RAW image files .arw?


    Ijust use "ufraw" and it does the trick perfectly. Now Iwish I could figure out how to batch convert them into .jpg with ImageMagick (it seems support for .raw is not guaranteed or it has to be compiled in). apt-get install ufraw........
  • linux bash mass rename tool Centos/Debian/Ubuntu


    Say you have a bunch of files like this: file-01.jpg file-02.jpg ............... What if you want to mass rename them? the rename tool can work just like sed For Debian based distros: Note "file" is what we search for and "newname" is what we replace it with, so substitute according to your requirements. rename s/file/newname/ name-file-*.jpg For R........
  • imagemagick converting jpg images to pdf file size too large


    If the file size is too large you need to resize them on the fly: convert -resize 25% *.jpg output.pdf The resize flag takes a % I have tried without and it seems to take it as pixels and becomes way too small. You can also play with the "-quality 25" flag to decrease file size even more.........
  • convert imagemagick pdf to jpg is too small when converting solution


    It is a common issue and here is the solution (increase the density/dpi): convert -density 120 some.pdf output.jpg You will need to play with the density setting to get the perfect file size and resolution. If you want a smaller file you can always use the "-quality" switch and eg. -quality 25 would be 25%/100 quality........
  • Linux how to combine images into a single one using convert from ImageMagick


    convert -append file1.jpg file2.jpg output.jpg The above is all there is to it. file1.jpg and file2.jpg are the ones to combine (the order is used)and output.jpg is the combined image.........
  • Linux bash read exif data tags from image jpeg/tiff/jpg


    Use the program exiftags exiftags 20141031_155127.jpg-45460829d582e9.jpg exiftags: couldn't find Exif data........
  • PHP Warning: imagecreatefromjpeg(): gd-jpeg, libjpeg: recoverable error: Premature end of JPEG file


    I was having an issue with only certain random/jpeg files with the functions imagecreatefromjpeg imagecreatetruecolor and other related ones. This issue was annoying basically it seems like a libgd issue/bug with newer versions of PHP and it was difficult to trace-out. One very useful thing that helped me was using "php-cgi" and passing the query string as an argument eg: php-cgi images.php source=IMG.jpg (that way you get all the error messages wh........
  • convert PDF to JPG howto in Linux


    Use imagemagick: convert -density 200 file.pdf file.jpg Increase the "density" value to get a higher resolution/larger file an decrease it to go smaller. This is really the quickest and simplest way.........
  • Login and download all files script


    This is very handy if you're too busy and don't have time to download whatever files you need. The -D specifies the domains allowed, this is because I specified -H which means foreign hosts are allowed, if you don't restrict them you'll end up going to the whole internet via ads and other links just like a search Engine would follow. -l 0 specifies to go deep, to as many levels as possible/as exist. -e robots=off is important because robots.txt often says you can't vie........
  • Convert PDF to JPG/JPEG without low resolution/small picture size


    convert -density 400 somepdf.pdf -scale 2000x1000 output.jpg The key is the "-density 400" switch and also -scale 2000x1000 To give credit I found the solution here: http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=10928 That was the perfect solution when I was frustrated with how small the resulting JPG's resulted. I'm sure this will help a lot of people when it comes time to converting a PDF to JPG which I'm amazed Imag........
  • Convert doc images/jpg/jpeg to PDF


    Use "ImageMagick" which can be installed easily on most UNIX/Linux distros. Remember that it will go with the standard file listing to determine the order but I believe you can manually specify multiple jpg's in the arguments. Convert image/jpg to PDF convert *.jpg yourpdf.pdf This is a very handy and free tool. Convert DOC/TXT documents to PDF If you wanted to convert a .doc file or text........
  • GNOME/Nautilus Resize Images/Pictures from File Manager by right clicking


    Just install the following package "nautilus-image-converter" and you will be able to right click any image and convert the size and rotate it. My only wish is that you could also convert the image type from say tiff to jpg etc... This is an awesome/handy/feature and great tool to have. This is one way where GNOME/Nautilus excel, the possibilities are endless to simplify and make simple/mundane tasks quicker and more efficient than ever.........
  • PDF File Conversion/Solution Using Imagemagick to create PDF files for free, quickly and efficiently


    I'm really starting to love ImageMagick, I've used it to mass convert/resize family photos with scripts and all kinds of handy things. Today I just learned that you can create PDF files with it too, say if you have images scanned or anything else it's very simple: convert *.jpeg output.pdf You can replace jpg with whatever format your files are in. One thing to remember is that you can specify the order that the images/pages are added to the PDF manu........
  • PHP cannot access /usr/bin/openssl


    PHP cannot access /usr/bin/opensslI have verified the username that runs the process is able to access /usr/bin/openssl and it does exist but the PHP script is saying it doesn't exist: [code:1:1fd0f3abbe] if (!file_exists($OPENSSL)) { //echo "ERROR: OPENSSL $OPENSSL not foundn"; }[/code:1:1fd0f3abbe] I don't get itI can clearly see the contents of /usr/bin by using the PHP system fu........
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