I want to convert a color pdf to black and white pdf in specific mode I want to convert all text in red or green in black (not in gray).
gs -o output.pdf \
-sDEVICE=pdfwrite \
-dBlackText=true \
-dBlackVector=true \
-sColorConversionStrategy=Gray \
-dProcessColorModel=/DeviceGray \
input.pdf
Step 1 - Installa the following package
sudo apt install imagemagick
Step 2 - Use the following command: convert *.jpeg my_pdf.pdf
The command above might yield an “operation not allowed” error. Fortunately, we
can easily fix it by executing:
sudo sed -i 's/^.*policy.*coder.*none.*PDF.\*//' /etc/ImageMagick-6/policy.xml
or better:
sudo gedit /etc/ImageMagick-6/policy.xml
add or change the row at end of the file (just before </policymap>) with the following:
<policy domain="coder" rights="read | write" pattern="PDF" />
$pattern = '/[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/';
if ($file = fopen("a.vcf", "r")) {
while(!feof($file)) {
$line = fgets($file);
if (preg_match($pattern, $line, $matches)) echo $matches[0]."\n";
}
fclose($file);
}
Step 1: Create a python program called mergePDF.py
import PySimpleGUIQt as sg
import sys
import os
arg = sys.argv[1:]
current_working_directory = os.getcwd() + "/undefined.pdf"
current_working_directory = "/home/max/Scrivania" + "/undefined.pdf"
class Listbox(sg.Listbox):
def dragEnterEvent(self, e):
e.accept()
def dragMoveEvent(self, e):
e.accept()
def dropEvent(self, e):
data = window['LISTBOX'].get_list_values()
items = [str(v).replace("PySide2.QtCore.QUrl('file://", "").replace("')", "") for v in e.mimeData().urls()]
for x in items:
if (x[-4:].upper() != '.PDF'): items.remove(x)
data.extend(items)
window['LISTBOX'].update(data)
window.refresh()
def enable_drop(self):
self.Widget.setAcceptDrops(True)
self.Widget.dragEnterEvent = self.dragEnterEvent
self.Widget.dragMoveEvent = self.dragMoveEvent
self.Widget.dropEvent = self.dropEvent
file_list_column = [
[
Listbox(arg, size=(50, 10), enable_events=True, key='LISTBOX', select_mode="single"),
],
[
sg.Input(default_text=current_working_directory, key='FOLDER')
],
]
image_button_move_column = [
[sg.Button("Up")],
[sg.Button("Down")],
[sg.Button("Delete")],
]
image_button_action_column = [
[
sg.Button("Merge")
],
]
layout = [
[
sg.Column(file_list_column),
sg.VSeperator(),
sg.Column(image_button_move_column),
sg.VSeperator(),
sg.Column(image_button_action_column),
]
]
window = sg.Window("pdfMerge V1.0", layout, finalize=True, resizable=False)
window['LISTBOX'].enable_drop()
def retreive_elem_selected(element):
if element['LISTBOX']:
item = element['LISTBOX'][0]
else: item = ""
return item
def manage_up(item, mylist):
if item:
pos = mylist.index(item)
newpos = pos-1
if newpos>-1:
mylist.insert(
newpos,
mylist.pop(pos)
)
return mylist
def manage_down(item, mylist):
if item:
pos = mylist.index(item)
newpos = pos+1
mylist.insert(
newpos,
mylist.pop(pos)
)
return mylist
def manage_delete(item, mylist):
if item:
mylist.remove(item)
return mylist
def manage_merge(mylist,myfile):
if myfile:
str1 = " ".join(str("\""+x+"\"") for x in mylist)
os.system("qpdf --empty --pages "+ str1 + " -- " + myfile)
else: sg.popup('','The output field is empty')
while True:
event, values = window.read()
item_selected = retreive_elem_selected(values)
mylist = window['LISTBOX'].get_list_values()
if event == sg.WINDOW_CLOSED:
break
if event == 'Merge':
manage_merge(mylist,window['FOLDER'].get())
if event == 'Up':
window['LISTBOX'].update(manage_up(item_selected,mylist))
window['LISTBOX'].set_value(item_selected)
if event == 'Down':
window['LISTBOX'].update(manage_down(item_selected,mylist))
window['LISTBOX'].set_value(item_selected)
if event == 'Delete':
if item_selected:
pos = mylist.index(item_selected)
window['LISTBOX'].update(manage_delete(item_selected,mylist))
mylist = window['LISTBOX'].get_list_values()
if mylist:
if pos < len(mylist):
window['LISTBOX'].set_value(mylist[pos])
else: window['LISTBOX'].set_value(mylist[-1:])
window.close()
Step 2: create a bash file mergePDF.sh to run the mergePDF.py#!/bin/bash
python3 /home/max/batfile/Py/mergePDF.py "$@"
where /home/max/batfile/Py/ is the path where your python file is stored
in my case into /home/max/.local/share/nautilus/scripts
#!/bin/bash
clear
# Example: ./mp4ToMp3.sh ~/Downloads
for entry in "$1"/*.mp4
do
ext="${entry##*.}"
filename="${entry:0:${#entry} - ${#ext}}"
mp3file="${filename}mp3"
echo "$entry ===> $mp3file"
ffmpeg -i "$entry" -vn -acodec libmp3lame -ac 2 -ab 160k -ar 48000 "$mp3file"
done
<script>
var reimg
window.onload=function () {
reimg=document.getElementById('re')
setInterval(function () {
reimg.src=reimg.src.replace(/\?.*/,function () {
return '?'+new Date()
})
},2000)
}
</script>
<img src="http://151.97.160.13/GetImage.cgi?CH=0" id="re">
<html> <style> #main { padding:3em 2em; //background-color:#333; position:absolute; //top:50%; //left:50%; top:0%; left:0%; //margin-top:-150px; //margin-left:-150px; //width:340px; //height:140px; width:100%; height:100%; -moz-opacity: 0.35; -khtml-opacity: 0.35; opacity: 0.35; -ms-filter:"progid:DXImageTransform.Microsoft.Alpha"(Opacity=35); filter: progid:DXImageTransform.Microsoft.Alpha(opacity=35); filter:alpha(opacity=35); } </style> <title>Youtube background in your page</title> <body><div style="position: fixed; z-index: -99; width: 100%; height: 100%"> <iframe frameborder="0" height="100%" width="100%" src="https://youtube.com/embed/DSLgAsrcpGQ?autoplay=1&controls=0&loop=1&showinfo=0&autohide=1&wmode=transparent&hd=1"> </iframe> </div><div id="main" > <center> <img src="http://static.lulu.com/browse/product_thumbnail.php?productId=21371401&resolution=320"> </center> <!-- <iframe frameborder="0" height="100%" width="100%" src="http://www.mypage.com"> </iframe> --> </div></body> </html>
"smile and the world will smile"
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