i have Photos in multiple directories. I want to use jpegtran (command line tool) to recursivly go through each one, optimise it, and save it (overwrite it)
if they are all in one folder i use this
for JPEG in *.jpg ; do jpegtran -optimize $JPEG > $JPEG; done
but i can't get it working recursivly and overwriting the same file (rather than to a new filename)
any tips?
jpegtran whole directory
find /the/image/path -name "*.jpg" -type f -exec jpegtran -copy none -optimize -outfile {} {} \;
How about using the find command:
find /your/dir -name '*.jpg' -exec echo jpegtran -optimize {} \;
Run the command, if you like the output, remove echo to execute it.
It is usually a whole lot easier to use find in such cases, because what you want to do is act on a few filenames. The find utility will give you those names. Assuming you have GNU (or maybe even BSD) tools, the following example will illustrate this common scenario.
For example:
$ find ~/images/wallpapers/TEMP/ -type f -iname '*jpg' \
-exec sh -c 'jpegtran -outfile {}.out -optimize {}; mv {}.out {} ' \;
find looks for all files ending with jpg in the TEMP folder, recursively.
For every full file path found (denoted by `{}'), find will run the command given to -exec
the -exec option cheats and runs several commands instead of one through sh
Notes
cat file > file is not allowed because simultaneously reading from, and writing to the same file is not a well defined or even supported operation in bash.
Talking about Python approach:
Firstly make an list of all of your paths.
Then:
import subprocess
for path in paths:
for image_name in arr:
subprocess.call(["jpegtran", "-your", "-instructions"])
Let's say your instruction is something like:
jpegtran -optimize -progressive -scans script_new.txt -outfile progressive.jpg original.jpg
So your instruction will be like:
subprocess.call(["jpegtran", "-optimize", "-progressive", "-scans", f"{scan_name}.txt", "-outfile", name_progressive, name_original])
For your convenience, name_progressive, name_original and scan_name are variables and concept f-string is used.
Related
I'm trying to source a file that I can get from the output of find using these commands:
find ./ -iname activate.fish -exec source {} \;
and
find ./ -iname activate.fish -exec builtin source {} \;
But both these commands give the error of the form find: ‘source’: No such file or directory or find: ‘builtin’: No such file or directory. Seems like exec of find is not able to recognize fish's builtins ?
What I basically want to achieve is a single command that will search for Python's virtualenv activate scripts in the current directory and execute them.
So doing something like -exec fish -c 'source {}; \ would not help. I've tried it as well and it doesn't error out but does not make the changes either.
Any ideas what can be done for this ?
Thanks!
Perhaps you need:
for file in (find ./ -iname activate.fish)
source $file
end
# or
find ./ -iname activate.fish | while read file
source $file
end
Command substitution executes the command, splits on newlines, and returns that list.
As mentioned in comments, seems like -exec does not run in or affect the current shell environment. So find -exec is not gonna work for my use case.
Instead, this will work:
source (find ./ -iname activate.fish)
I have to execute command in bash for all files in a folder with the extension ".prot'
The command is called "bezogener_Spannungsgradient" and it's called like that:
bezogener_Spannungsgradient filename.prot
Thanks!
find . -maxdepth 1 -name \*.prot -exec bezogener_Spannungsgradient {} \;
-maxdepth <depth> keeps find from recursing into subdirectories beyond the given depth.
-name <pattern> limits find to files matching the pattern. The escape is necessary to keep bash from expanding the find option into a list of matching files.
-exec <cmd> {} \; executes <cmd> on each found file (replacing {} with the filename). If the command is capable of processing a list of files, use + instead of \;.
I generally recommend becoming familiar with the lots of other options of find; it's one of the most underestimated tools out there. ;-)
You could do this:
for f in *.prot; do
bezogener_Spannungsgradient "$f"
done
I have created an ImageMagick command to join images with certain names:
convert -append *A_SLIDER.jpg *B_SLIDER.jpg out.jpg
I have lots of folders with files named *A_SLIDER.jpg and *B_SLIDER.jpg next to each other (only ever one pair in a directory).
I would like to recursively search a directory with many folders and execute the command to join the images.
If it is possible to name the output image based on the input images that would be great e.g.
=> DOGS_A_SLIDER.jpg and DOGS_B_SLIDER.jpg would combine to DOGS_SLIDER.jpg
Something like this, but back up first and try on a sample directory only!
#!/bin/bash
find . -name "*A_SLIDER*" -execdir bash -c ' \
out=$(ls *A_SLIDER*);
out=${out/_A/}; \
convert -append "*A_SLIDER*" "*B_SLIDER*" $out' \;
Find all files containing the letters "A_SLIDER" and go to the containing directory and start bash there. While you are there, get the name of the file, and remove the _A part to form the output filename. Then execute ImageMagick convert with the _A_ and the corresponding _B_ files to form the output file.
Or, a slightly more concise suggestion from #gniourf_gniourf... thank you.
#!/bin/bash
find . -name "*A_SLIDER.jpg" -type f -execdir bash -c 'convert -append "$1" "${1/_A_/_B_}" "${1/_A/}"' _ {} \;
The "find" command will recursively search folders:
$ find . -name "*.jpg" -print
That will display all the filenames. You might instead want "-iname" which does case-insensitive filename matching.
You can add a command line with "-exec", in which "{}" is replaced by the name of the file. You must terminate the command line with "\;":
$ find . -name "*.jpg" -exec ls -l {} \;
You can use sed to edit the name of a file:
$ echo DOGS_A_SLIDER.jpg | sed 's=_.*$=='
DOGS
Can you count on all of your "B" files being named the same as the corresponding "A" files? That is, you will not have "DOGS_A_SLIDER.jpg" and "CATS_A_SLIDER.jpg" in the same directory. If so, something like the following isn't everything you need, but will contribute to your solution:
$ find . -type f -name "*.jpg" -exec "(echo {} | sed 's=_.*==')" \;
That particular sed script will do the wrong thing if you have any directory names with underscores in them.
"find . -type f" finds regular files; it runs modestly faster than without the -type. Use "-d" to find directories.
I currently have ~40k RAW images that are in a nested directory structure. (Some folders have as many as 100 subfolders filled with files.) I would like to move them all into one master directory, with no subfolders. How could this be accomplished using mv? I know the -r switch will copy recursively, but this copies folders as well, and I do not wish to have subdirectories in the master folder.
If your photos are in /path/to/photos/ and its subdirectories, and you want to move then in /path/to/master/, and you want to select them by extension .jpg, .JPG, .png, .PNG, etc.:
find /path/to/photos \( -iname '*.jpg' -o -iname '*.png' \) -type f -exec mv -nv -t '/path/to/master' -- {} +
If you don't want to filter by extension, and just move everything (i.e., all the files):
find /path/to/photos -type f -exec mv -nv -t '/path/to/master' -- {} +
The -n option so as to not overwrite existing files (optional if you don't care) and -v option so that mv shows what it's doing (very optional).
The -t option to mv is to specify the target directory, so that we can stack all the files to be moved at the end of the command (see the + delimiter of -exec). If your mv doesn't support -t:
find /path/to/photos \( -iname '*.jpg' -o -iname '*.png' \) -type f -exec mv -nv -- {} '/path/to/master' \;
but this will be less efficient, as one instance of mv will be created for each file.
Btw, this moves the files, it doesn't copy them.
Remarks.
The directory /path/to/master must already exist (it will not be created by this command).
Make sure the directory /path/to/master is not in /path/to/photos. It would make the thing awkward!
Make use of -execdir option of find:
find /path/of/images -type f -execdir mv '{}' /master-dir \;
As per man find:
-execdir utility [argument ...] ;
The -execdir primary is identical to the -exec primary with the exception that
utility will be executed from the directory that holds the current
file. The filename substituted for the string ``{}'' is not qualified.
Since -execdir makes find execute given command from each directory therefore only base filename is moved without any parent path of the file.
find <base location of files> -type -f -name \*\.raw -exec mv {} master \;
If your hierachy is only one level deep, here is another way using the automated tools of StringSolver:
mv -a firstfolder/firstfile.raw firstfile.raw
The -a options immediately applies the similar transformation to all similar files at a nesting level 1 (i.e. for all other subfolders).
If you do not trust the system, you can use other options such as -e to explain the transformation or -t to test it on all files.
DISCLAIMER: I am a co-author of this work for academic purposes, and working on a bash script renderer. But the system is already available for testing purposes.
I'm trying to create a batch file in linux that will allow me to change extensions of files in multiple subdirectories. After much searching and experimenting i've found what seems to be a solution:
find /volume1/uploads -name "*.mkv" -exec rename .mkv .avi {} +
When running the script i get the following error:
find: -exec CMD must end by ';'
I've tried adding ; and \; (with or without +) but to no avail. What's wrong with the command and how can I fix it?
Edit: Running on a Synology NAS with DSM 4.2
you have to escape all characters that would be interpreted by bash. in your case these are the semicolon and the curly braces (you forgot to escape the latter in your code):
find /volume1/uploads -name "*.mkv" -exec rename .mkv .avi \{\} \;
the {} (in our case \{\}) is expanded to the filename, so the actual call would look like rename .mkv .avi /volume1/uploads/foo/bla.mkv (which is not the exact syntax the /usr/bin/rename needs, at least on my system).
instead it would be something like:
find /volume1/uploads -name "*.mkv" -exec rename 's/\.mkv$/.avi/' \{\} \;
UPDATE
if you don't want to (or cannot) use perl's rename script, you could use the following simple bash script and save it as /tmp/rename.sh
#!/bin/sh
INFILE=$1
OUTFILE="${INFILE%.mkv}.avi"
echo "moving ${INFILE} to ${OUTFILE}"
mv "${INFILE}" "${OUTFILE}"
make it executable (chmod u+x /tmp/rename.sh) and call:
find /volume1/uploads -name "*.mkv" -exec /tmp/rename.sh \{\} \;
UPDATE2
it turned out that this question is really not about bash but about busybox.
with a limited shell interpreter like busybox, the simplest solution is just to append the new file extension:
find /volume1/uploads -name "*.mkv" -exec mv \{\} \{\}.avi \;
Not sure how different find and rename commands are on your DSM 4.2 OS so try something like:
find /volume1/uploads -name "*.mkv" | while read filename;
do mv -v "${filename}" "$(echo "${filename}" | sed -e 's/\.mkv$/\.avi/')"
done