bitsgalore

ImageMagick / OpenJPEG build and install notes

I always end up getting this wrong; steps below worked for Linux Mint 19.3 (based on Ubuntu 18.04). Build/installation order is important; JPEG 2000 support in ImageMagick only works if OpenJPEG is found at build time, so we have to start with that. Note that for OpenJPEG an 'openjpeg-dev' Debian package exists. As I'm not entirely sure this is the most up-to-date version, and JPEG 2000 support is important for me, I'm compiling this library from the sources here. Otherwise everything under the 'OpenJPEG' could probably be subsituted by the one-liner sudo at-get install openjpeg-dev).

Cmake

bitsgalore

#! /usr/bin/env python3

"""
Geolocate web domains. Input file is a text file where each line contains
1 web domain.

Author: Johan van der Knijff
Requirements:

1. Unix/Linux environment with 'host' tool installed,

bitsgalore

<?xml version='1.0' encoding='UTF-8'?>
<jpylyzer xmlns="http://openpreservation.org/ns/jpylyzer/v2/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://openpreservation.org/ns/jpylyzer/v2/ http://jpylyzer.openpreservation.org/jpylyzer-v-2-0.xsd">
<toolInfo>
    <toolName>jpylyzer</toolName>
    <toolVersion>2.0.0</toolVersion>
</toolInfo>
<file xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ns0="adobe:ns:meta/" xmlns:ns2="http://ns.adobe.com/xap/1.0/" xmlns:ns4="http://ns.adobe.com/photoshop/1.0/" xmlns:ns5="http://ns.adobe.com/xap/1.0/mm/" xmlns:ns6="http://ns.adobe.com/xap/1.0/sType/ResourceEvent#" xmlns:ns7="http://ns.adobe.com/tiff/1.0/" xmlns:ns8="http://ns.adobe.com/exif/1.0/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
    <fileInfo>
        <fileName>jpeg2000_2x.jp2</fileName>
        <filePath>/home/johan/Downloads/jpeg2000_2x.jp2</filePath>

bitsgalore

#!/bin/bash

# Check value of last-modified date header for list of URLs
#
#  Uses curl:  https://curl.haxx.se/

# Display usage message if command line does not contain expected
# number of arguments
if [ "$#" -ne 2 ] ; then
    echo "Usage: checkLastModified.sh fileIn fileOut" >&2

bitsgalore

<?xml version='1.0' encoding='UTF-8'?>
<jpylyzer xmlns="http://openpreservation.org/ns/jpylyzer/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://openpreservation.org/ns/jpylyzer/ http://jpylyzer.openpreservation.org/jpylyzer-v-1-1.xsd">
    <toolInfo>
        <toolName>jpylyzer</toolName>
        <toolVersion>1.18.0</toolVersion>
    </toolInfo>
    <fileInfo>
        <fileName>openJPEG15.jp2</fileName>
        <filePath>/home/johan/jpylyzer-test-files/openJPEG15.jp2</filePath>
        <fileSizeInBytes>670372</fileSizeInBytes>

bitsgalore

Reading a tape with dd and mt

In the simplest case, reading data from a tape involves nothing more than a dd command line such as this one:

dd if=/dev/nst0 of=file0001.dd bs=16384

Here, the "if" argument tells dd to read input from the non-rewind block device /dev/nst0, and the value of "of" defines the file where

bitsgalore

Proposed jpylyzer output format changes

Johan van der Knijff, 3 July 2019

This document describes some proposed changes to the jpylyzer output format for the upcoming jpylyzer 2.0 release (which is foreseen for November 2019). The main occasion for these changes is the addition of raw codestream validation functionality. Since this functionality will lead to a small (but nevertheless breaking) change to jpylyzer's output format, this is a good moment for fixing a few other inconsistencies.

Related Github issues are:

• Add option to validate raw codestreams (through API, possibly also CLI) #113
• Suggested output improvements (jpylyzer 2.x) #55

bitsgalore

<?xml version='1.0' encoding='UTF-8'?>
<jpylyzer xmlns="http://openpreservation.org/ns/jpylyzer/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://openpreservation.org/ns/jpylyzer/ http://jpylyzer.openpreservation.org/jpylyzer-v-2-0.xsd">
<toolInfo>
    <toolName>jpylyzer</toolName>
    <toolVersion>2.0.0a1</toolVersion>
</toolInfo>
<file>
    <fileInfo>
        <fileName>aware.jp2</fileName>
        <filePath>/home/johan/test/aware.jp2</filePath>

bitsgalore

<?xml version='1.0' encoding='UTF-8'?>
<jpylyzer xmlns="http://openpreservation.org/ns/jpylyzer/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://openpreservation.org/ns/jpylyzer/ http://jpylyzer.openpreservation.org/jpylyzer-v-2-0.xsd">
<toolInfo>
    <toolName>jpylyzer</toolName>
    <toolVersion>2.0.0a1</toolVersion>
</toolInfo>
<file>
    <fileInfo>
        <fileName>aware.jp2</fileName>
        <filePath>/home/johan/test/aware.jp2</filePath>

bitsgalore

<?xml version='1.0' encoding='UTF-8'?>
<jpylyzer xmlns="http://openpreservation.org/ns/jpylyzer/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://openpreservation.org/ns/jpylyzer/ http://jpylyzer.openpreservation.org/jpylyzer-v-2-0.xsd">
<toolInfo>
    <toolName>jpylyzer</toolName>
    <toolVersion>2.0.0a1</toolVersion>
</toolInfo>
<file>
    <fileInfo>
        <fileName>is_codestream.j2c</fileName>
        <filePath>/home/johan/test/is_codestream.j2c</filePath>