{"id":3935,"date":"2013-05-14T15:06:15","date_gmt":"2013-05-14T12:06:15","guid":{"rendered":"http:\/\/mummila.net\/kommentit\/?p=3935"},"modified":"2013-05-14T15:07:27","modified_gmt":"2013-05-14T12:07:27","slug":"zero-check-failed-in-ifo_read-c904-for-pgc-subp_controli-0x00000001","status":"publish","type":"post","link":"https:\/\/mummila.net\/kommentit\/2013\/05\/14\/zero-check-failed-in-ifo_read-c904-for-pgc-subp_controli-0x00000001\/","title":{"rendered":"Zero check failed in ifo_read.c:904 for pgc->subp_control[i] = 0x00000001"},"content":{"rendered":"

When reading ’The Snowman’ DVD from 2004, I get this output:<\/p>\n

jani@saegusa:DVD$ dvdbackup -i \/dev\/sr0 -M
\nlibdvdread: Using libdvdcss version 1.2.12 for DVD access<\/p>\n

libdvdread: Attempting to retrieve all CSS keys
\nlibdvdread: This can take a _long_ time, please be patient<\/p>\n

libdvdread: Get key for \/VIDEO_TS\/VIDEO_TS.VOB at 0x0000015a
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_01_0.VOB at 0x000001c1
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_01_1.VOB at 0x00023749
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_02_0.VOB at 0x000241f0
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_02_1.VOB at 0x0002423d
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_03_0.VOB at 0x00024f03
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_03_1.VOB at 0x00024f50
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_04_0.VOB at 0x00025d8f
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_04_1.VOB at 0x00025ddc
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_05_0.VOB at 0x000e2c65
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_05_1.VOB at 0x000e2cb2
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_06_0.VOB at 0x000eb4df
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_06_1.VOB at 0x000eb52c
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_07_0.VOB at 0x000f7617
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_07_1.VOB at 0x000f7664
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_08_0.VOB at 0x00128eb1
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_08_1.VOB at 0x00128efe
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_09_0.VOB at 0x001da296
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_09_1.VOB at 0x001da2e3
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_10_0.VOB at 0x001e3856
\nlibdvdread: Elapsed time 0
\nlibdvdread: Get key for \/VIDEO_TS\/VTS_10_1.VOB at 0x001e38a3
\nlibdvdread: Elapsed time 0
\nlibdvdread: Found 10 VTS’s
\nlibdvdread: Elapsed time 0
\n*** Zero check failed in \/build\/buildd\/libdvdread-4.2.0\/src\/ifo_read.c:904
\nfor pgc->subp_control[i] = 0x00000001
\n*** Zero check failed in \/build\/buildd\/libdvdread-4.2.0\/src\/ifo_read.c:904
\nfor pgc->subp_control[i] = 0x00000001
\n*** Zero check failed in \/build\/buildd\/libdvdread-4.2.0\/src\/ifo_read.c:904
\nfor pgc->subp_control[i] = 0x00000001<\/p>\n

This doesn’t prevent dvdbackup from finishing up, and the resulting copy looks to be fine (on cursory inspection). While dvdbackup is running, the issue also doesn’t cause an OOM as in Bug #377414<\/a>. Still, I tested libdvdread4_4.2.0+20130428-0ubuntu0~bryce~precise1_amd64.deb from Bryce Harrington’s PPA [1], but it just slightly changed the ”Zero check failed” output:<\/p>\n

*** Zero check failed in ifo_read.c:904
\nfor pgc->subp_control[i] = 0x00000001
\n*** Zero check failed in ifo_read.c:904
\nfor pgc->subp_control[i] = 0x00000001
\n*** Zero check failed in ifo_read.c:904
\nfor pgc->subp_control[i] = 0x00000001<\/p>\n

This DVD is the only one I’ve come across manifesting this, and I’ve backed up some 40 DVDs so far on this same setup.<\/p>\n

*[1] https:\/\/launchpad.net\/~bryce\/+archive\/lp377414\/+build\/4542681<\/p>\n","protected":false},"excerpt":{"rendered":"

When reading The Snowman DVD I get this output. Doesn’t prevent dvdbackup from finishing up, and the resulting copy looks to be fine.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8860],"tags":[],"class_list":["post-3935","post","type-post","status-publish","format-standard","hentry","category-vianhallintajarjestelmat","sijainti-launchpad"],"_links":{"self":[{"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/posts\/3935","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/comments?post=3935"}],"version-history":[{"count":4,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/posts\/3935\/revisions"}],"predecessor-version":[{"id":3938,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/posts\/3935\/revisions\/3938"}],"wp:attachment":[{"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/media?parent=3935"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/categories?post=3935"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/tags?post=3935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}