Hiccup during Image Upload/Processing

[conditionedBeard]

Hello everyone,

Have an error message, which sometimes shows, sometimes it doesn't.
Would like to get some feedback please.

I am running a resize command, which sometimes produces an error.
The command is:

Code: Select all

convert ../testuser/live00001.jpg -resize 225x169 ../thumbs/tinylive.jpg

The two eMails that sometimes arrive with the error message are:

convert: Empty input file ` ../testuser/live00001.jpg' @ error/jpeg.c/EmitMessage/233.
convert: missing an image filename `../thumbs/tinylive.jpg' @ error/convert.c/ConvertImageCommand/2919.

AND

convert: Premature end of JPEG file `../testuser/live00001.jpg' @ warning/jpeg.c/EmitMessage/228.
convert: Corrupt JPEG data: premature end of data segment `../testuser/live00001.jpg' @ warning/jpeg.c/EmitMessage/228.

I believe these are occurring because the images are uploaded by "wireless modems".
These wireless modems have "scetchy" signals... thus the upload sometimes 'hangs' and stays mid-way.

Is there a way to set a parameter, to check if the images is being rewritten, or if it is 0kB, not to process?

Thoughts?
Thank you very much for the help!
Much appreciated

Let me know if you need more information!

-- HP
.

[fmw42]

see unix commands; search google for file tests, e.g

http://tldp.org/LDP/abs/html/fto.html
http://linuxreviews.org/beginner/bash_G ... Reference/

use such tests in an conditional with your convert so that if it fails, it does not do the convert

# test if image an ordinary, readable and non-zero size
if [ -f $infile -a -r $infile -a -s $infile ]; then
convert ...
else
echo "--- FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAS ZERO SIZE ---"
exit 1
fi


OR

if convert -quiet -regard-warnings "$infile" ...
then
: ' do nothing '
else
echo "--- FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAG ZERO SIZE ---"
fi

[conditionedBeard]

Hello fmw42,
It took me a while, yet I did the fix with your examples, and everything is working flawlessly.

Thank you very much for your help.
I didn't thank you when you posted.

Have a good one!

see unix commands; search google for file tests, e.g

http://tldp.org/LDP/abs/html/fto.html
http://linuxreviews.org/beginner/bash_G ... Reference/

use such tests in an conditional with your convert so that if it fails, it does not do the convert

# test if image an ordinary, readable and non-zero size
if [ -f $infile -a -r $infile -a -s $infile ]; then
convert ...
else
echo "--- FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAS ZERO SIZE ---"
exit 1
fi


OR

if convert -quiet -regard-warnings "$infile" ...
then
: ' do nothing '
else
echo "--- FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAG ZERO SIZE ---"
fi