Bug#744177: JBIG and JBIG2 files are not detected

2017-03-28 Thread Paul Wise
Some additional data points for detection of JBIG1/JBIG2 in libmagic: The ITU specifications for both formats are now freely downloadable. JBIG2 has a header containing an 8-byte signature: 97 4A 42 32 0D 0A 1A 0A http://fileformats.archiveteam.org/wiki/JBIG2 There is a sample JBIG2 file in the

Bug#744177: JBIG and JBIG2 files are not detected

2016-07-26 Thread Christoph Biedl
Erik Thiele wrote... > hi > > > Yes, that needs attention. Do you have more public information about > > the file format? I only found the jbigkit sources so far and couldn't > > figure out the details so far. > > JBIG: > http://www.jpeg.org/jbig/index.html > no real information seems to be avai

Bug#744177: JBIG and JBIG2 files are not detected

2014-04-27 Thread Erik Thiele
hi > Yes, that needs attention. Do you have more public information about > the file format? I only found the jbigkit sources so far and couldn't > figure out the details so far. JBIG: http://www.jpeg.org/jbig/index.html no real information seems to be available here. but jbigkit sources could

Bug#744177: JBIG and JBIG2 files are not detected

2014-04-26 Thread Christoph Biedl
tags 744177 confirmed upstream moreinfo thanks Erik Thiele wrote... > ### first lets create a demo image. Thanks for that reproducer. > and here is the bug / wishlist: > > bash$ file * > back85.pbm: Netpbm PBM "rawbits" image data <-- OK > back.pbm: Netpbm PBM "rawbits" image dat

Bug#744177: JBIG and JBIG2 files are not detected

2014-04-10 Thread Erik Thiele
Package: libmagic1 Version: 5.11-2+deb7u3 ### first lets create a demo image. bash$ cat >source_ascii.pbm < source.pbm ### please install jbigkit-bin 2.0-2+deb7u1 ### lets create JBIG and JBIG2 files from our original image: bash$ pbmtojbg source.pbm > comp.jbg bash$ pbmtojbg85 source.pbm > comp.