using convert to convert an ascii text to an image trouble

[McRib]

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#!/bin/bash

OUTPUT=`mycommand`
convert -size 100x65 xc:lightblue -font Courier -pointsize 8 \
           -annotate +0+8 "$OUTPUT" -depth 1  -

running the script gives me:

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convert: no encode delegate for this image format `-'.

Writing to a file works, but I would prefer holding the data in the script...

I also need access to the pixels and would prefer something raw. The device that should get the output needs a special treatment:

ABCD -- where each letter stands for one pixel with 2 bits color depth

DCBA -- is what the devices likes to see :-/

Is Imagemagick able to provide should a fancy format ? If not - how close can I get to it ?

[anthony]

You did not specify what format to use for the output! As the base image was initernally generated IM has no fallback to use.

Replace - with maybe png:- for a PNG format image, output to standard output.

See IM Examples, Image File Handling, Saving Images
http://www.imagemagick.org/Usage/files/#save
In fact you may find the first three sections of IM examples essential reading.