PDF to PNGs: get output filenames

[peterpham]

I wrote a bash script to watch for pdf in a directory and convert them into png files.
Each pdf may have more than one pages.
Is there an easy way to grab for exactly converted png files?

I used command as

Code: Select all

convert -density 400 myfile.pdf myfile-%03d.png 

so png files will be:

• myfile-000.png
  myfile-001.png
  myfile-002.png
  ...

Can I somehow grab these output filenames into a variable?
The reasons why I want to do this are:

• -Log generated output files
  -Continue to do image optimize on each pdf

[fmw42]

filename1=`convert myfile-000.png -format "%t" info:` gives the top of the filename (no suffix)
filename1=`convert myfile-000.png -format "%f" info:` gives the full filename with suffix

see
http://www.imagemagick.org/script/escape.php

[peterpham]

filename1=`convert myfile-000.png -format "%t" info:` gives the top of the filename (no suffix)
filename1=`convert myfile-000.png -format "%f" info:` gives the full filename with suffix

see
http://www.imagemagick.org/script/escape.php

This won't work as I don't know what the PNG will be.
As I said, I convert PDF to PNG and it can produce multiple PNGs file.

I think using "-format" is the right direction, but not sure how to make it work.
I have tried, for example, following

Code: Select all

convert -density 400 myfile.pdf myfile-%03d.png -format "%f" info:

However, it would give me (say, my PDF has 3 pages)

Code: Select all

myfile.pdf myfile.pdf myfile.pdf 

while I actually want this

Code: Select all

myfile-000.png myfile-001.png myfile-002.png

[fmw42]

filename1=`convert myfile-000.png -format "%t" info:` gives the top of the filename (no suffix)
filename1=`convert myfile-000.png -format "%f" info:` gives the full filename with suffix

see
http://www.imagemagick.org/script/escape.php

This won't work as I don't know what the PNG will be.
As I said, I convert PDF to PNG and it can produce multiple PNGs file.

I think using "-format" is the right direction, but not sure how to make it work.
I have tried, for example, following

Code: Select all

convert -density 400 myfile.pdf myfile-%03d.png -format "%f" info:

However, it would give me (say, my PDF has 3 pages)

Code: Select all

myfile.pdf myfile.pdf myfile.pdf 

while I actually want this

Code: Select all

myfile-000.png myfile-001.png myfile-002.png

try

convert -density 400 myfile.pdf myfile-%03d.png | convert myfile-*.png -format "%f" info:
myfile-000.png
myfile-001.png
myfile-002.png

[peterpham]

try

convert -density 400 myfile.pdf myfile-%03d.png | convert myfile-*.png -format "%f" info:
myfile-000.png
myfile-001.png
myfile-002.png

It doesn't work if the script runs for the first time.
I receive an error saying

unable to open image `myfile-*.png': No such file or directory @ error/blob.c/OpenBlob/2572.

So probably the png weren't generated at the time when the second convert runs.

When I run this script for the second time, yes, indeed, I get

• myfile-000.png
  myfile-001.png
  myfile-002.png

[fmw42]

You are right, but this seems to work the first time (after I deleted the images created earlier so as to test again for a first time run)


convert -density 400 myfile.pdf myfile-%03d.png
convert myfile-*.png -format "%f" info:

You might also try some kind of delay in the pipe stream, thought I am not enough a unix person to say what that would be.