When i convert images using ImageMagick "convert" tool i want to get filenames of the created files.
Using "-monitor" command-line argument i can get only input filenames.
Updated Answer
The simplest, and most direct, way of doing this is to use the -verbose option as follows:
convert rose: rose: rose: -verbose image_%04d.png
rose:=>image_0000.png[0] PPM 70x46 70x46+0+0 8-bit sRGB 6.97KB 0.000u 0:00.000
rose:=>image_0001.png[1] PPM 70x46 70x46+0+0 8-bit sRGB 6.97KB 0.000u 0:00.000
rose:=>image_0002.png[2] PPM 70x46 70x46+0+0 8-bit sRGB 6.97KB 0.000u 0:00.000
It took several iterations and far too much dinking around for me to get there, but I'll leave my earlier ideas below in case anyone wants to try out some "off the wall" and, let's say, "contrived", ways of doing similar things...
Option 1
You can use the %p escape sequence and -format and +identify like this:
convert rose: rose: rose: -format "image_%p.png\n" -identify image_%04d.png
image_0.png
image_1.png
image_2.png
Yes, I know it's not quite perfect, but it may be good enough to get you started.
Option 2
This might be another option:
convert rose: rose: rose: -verbose +identify 'rose-%04d.png' | grep png
rose:=>rose-0000.png[0] PPM 70x46 70x46+0+0 8-bit sRGB 7.06KB 0.000u 0:00.000
rose:=>rose-0001.png[1] PPM 70x46 70x46+0+0 8-bit sRGB 7.06KB 0.000u 0:00.000
rose:=>rose-0002.png[2] PPM 70x46 70x46+0+0 8-bit sRGB 7.06KB 0.000u 0:00.000
Option 3
convert -debug "Trace" rose: rose: rose: image_%04d.png 2>&1 | grep "\.png" | sort -u
image_%04d.png
image_0000.png
image_0001.png
image_0002.png
Option 4
Yet another option might be to create a file to mark the current time, and then run your command and find any newer files than the one you created before you started:
touch b4; sleep 1; convert rose: rose: rose: image_%04d.png
find . -newer b4
./image_0000.png
./image_0001.png
./image_0002.png
Option 5
Yet another option using the %o (output filename) escape you suggest - along with -verbose
convert rose: rose: rose: -format "%o" -verbose -identify image_%04d.png
rose:=>image_0000.png[0] PPM 70x46 70x46+0+0 8-bit sRGB 6.97KB 0.000u 0:00.000
rose:=>image_0001.png[1] PPM 70x46 70x46+0+0 8-bit sRGB 6.97KB 0.000u 0:00.000
rose:=>image_0002.png[2] PPM 70x46 70x46+0+0 8-bit sRGB 6.97KB 0.000u 0:00.000