#6 Thumbnailer doesn't work in most filemanagers because incremental loading isn't implemented.

Could not thumbnail '~/jp2-pixbuf-loader/tests/advanced.jp2': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/basic.jp2': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/cmyk.jp2': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/codestream.j2k': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/codestream_color.j2c': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/codestream_mono.j2c': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/complex.jp2': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/large.jpf': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/minimal.jp2': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/normal.jp2': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/relax.jp2': Incremental loading of image type “jp2” is not supported
Could not thumbnail '~/jp2-pixbuf-loader/tests/weird.jpm': Incremental loading of image type “jp2” is not supported

Finally had a look at this, it works in PCManFM because that one doesn't need incremental loading. All the other filemanagers I've tested do, though. ``` Could not thumbnail '~/jp2-pixbuf-loader/tests/advanced.jp2': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/basic.jp2': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/cmyk.jp2': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/codestream.j2k': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/codestream_color.j2c': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/codestream_mono.j2c': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/complex.jp2': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/large.jpf': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/minimal.jp2': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/normal.jp2': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/relax.jp2': Incremental loading of image type “jp2” is not supported Could not thumbnail '~/jp2-pixbuf-loader/tests/weird.jpm': Incremental loading of image type “jp2” is not supported ```