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some general information about converting documents

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Uwe Steinmann 2024-10-12 13:49:51 +02:00
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doc/README.Converters
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@ -1,3 +1,23 @@
Commands for converting documents
----------------------------------
This file contains commands for converting different document types
into
* text (for fulltext search)
* png (for preview images)
* pdf (for pdf documents)
Such conversions may not necessarily output an excact equivalent of
the input file, but outputs a suitable representation, e.g.
converting an mp3 file into text may output the metadata or even the
lyrics of the song. Converting it into a preview image may result
in a picture of the album cover.
Please note, that when ever a command outputs anything to stderr,
this will considered as a failure of the command. Most command line
programs have a parameter (.e.g. `-q`) to suppress such an output.
Conversion to text for fulltext search
=======================================
@ -78,6 +98,9 @@ message/rfc822
text/plain
iconv -c -f utf-8 -t latin1 '%f' | a2ps -1 -q -a1 -R -B -o - - | ps2pdf - -
The parameter `-q` is important because a2ps sends some statistical
data to stderr, which makes SeedDMS believe the command has failed.
application/x-xopp
xournalpp -p "%o" "%f"