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Old 02-19-2011, 04:26 PM   #31
rickhan
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Since almost all of the 100+ of the RAR archives have the same problem with the OPF file, they aren't corrupted. Whatever program that was used created them that way.
So what exactly would fix them?
I've never dealt with OPF files before. I could probably write a program to open the archives and edit the OPF file.
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Old 02-19-2011, 04:33 PM   #32
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just delete the opf files from the rar archives. calibre should still detect the html file inside the rar archive.
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Old 04-19-2012, 11:23 AM   #33
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Unhappy Spine is empty
Just to say, if the developer cannot help may be I can.

The 'spine is empty' problem happens a lot. It happens when you use the GUI (+ Kindle serial number) to DeDRM files

[Mod: Remaining detailed description of use of DeDRM tools deleted. Such discussion is not permitted on MobileRead. ]
Last edited by pdurrant; 04-19-2012 at 01:23 PM. Reason: detailed De-DRM discussion not permitted.
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Old 04-19-2012, 01:24 PM   #34
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Quote:
Originally Posted by ace_765 View Post
Just to say, if the developer cannot help may be I can.

The 'spine is empty' problem happens a lot. It happens when you use the GUI (+ Kindle serial number) to DeDRM files
Any problem to do with DRM removal is not a calibre problem, as calibre has no DeDRM capabilities itself.

Any problems with DRM removal tools should be raised at the place you got the tools.
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Old 04-19-2012, 02:20 PM   #35
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Angry Spine is empty (again)
Just did some research for this 'spine is empty' bug

Check out:

https://bugs.launchpad.net/calibre/+bug/908835

It suggests that you need a 64-bit machine with oodles of RAM (Kovid's recommendation).

Another site suggests that you need to upgrade your version of Calibre.

Basically, the file is too big and Calibre cannot decompress it, and it has a problem going from html to a css stylesheet.

Like I said, big files with zillions of chapters and links cause problems. If I do find a REAL workaround (this problem requires a source code re-write) I will let you know
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Old 04-19-2012, 02:27 PM   #36
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Calibre capabilities
Quote:
Originally Posted by pdurrant View Post
Any problem to do with DRM removal is not a calibre problem, as calibre has no DeDRM capabilities itself.

Any problems with DRM removal tools should be raised at the place you got the tools.
Well, yes Calibre does have DeDRM capabilities. It has plugins which do the job. Toolsv5 if you must know. I won't go into detail

I agree it is a programming related issue
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Old 04-19-2012, 02:32 PM   #37
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Quote:
Originally Posted by ace_765 View Post
Well, yes Calibre does have DeDRM capabilities. It has plugins which do the job. Toolsv5 if you must know. I won't go into detail
Those are not official Calibre plugins - they are 3rd party ones that happen to be compatible with Calibre.
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Old 04-19-2012, 03:07 PM   #38
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Let us be clear

I have DeDRM'd smaller files (from the same publisher) and converted them to epub very quickly, and without a hitch

It is the larger files which cause problems

Those plugins work if your e-reader is connected to your PC (it deosn't find the PIDs all the time) but the other software does (every time).

I have two files which give the 'spine is empty' error message. One is 30.3MB and the other is 36.4MB. Unofficial or not, those plugins worked on the smaller files.

This is an OEB error, a large file-handling error. Small files with limited TOCs and chapters convert easily. I HAVE CONVERTED OVER 200 OF THEM
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Old 04-19-2012, 03:49 PM   #39
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Spine is NOT empty
Just so you know, a 15.2MB file gave the following output:

Convert book 1 of 1 (The ******** with an active table of contents))
Resolved conversion options
calibre version: 0.8.47
{'asciiize': False,
'author_sort': None,
'authors': None,
'base_font_size': 0.0,
'book_producer': None,
'change_justification': u'original',
'chapter': u"//*[((name()='h1' or name()='h2') and re:test(., '\\s*((chapter|book|section|part)\\s+)|((prolog|pr ologue|epilogue)(\\s+|$))', 'i')) or @class = 'chapter']",
'chapter_mark': u'pagebreak',
'comments': None,
'cover': None,
'debug_pipeline': None,
'dehyphenate': True,
'delete_blank_paragraphs': True,
'disable_font_rescaling': False,
'dont_compress': False,
'duplicate_links_in_toc': False,
'enable_heuristics': True,
'extra_css': None,
'extract_to': None,
'filter_css': u'',
'fix_indents': True,
'font_size_mapping': None,
'format_scene_breaks': True,
'html_unwrap_factor': 0.4,
'input_encoding': None,
'input_profile': <calibre.customize.profiles.MobipocketInput object at 0x04247E50>,
'insert_blank_line': False,
'insert_blank_line_size': 0.5,
'insert_metadata': False,
'isbn': None,
'italicize_common_cases': True,
'keep_ligatures': False,
'language': None,
'level1_toc': None,
'level2_toc': None,
'level3_toc': None,
'line_height': 0.0,
'linearize_tables': False,
'margin_bottom': 5.0,
'margin_left': 5.0,
'margin_right': 5.0,
'margin_top': 5.0,
'markup_chapter_headings': True,
'max_toc_links': 50,
'minimum_line_height': 120.0,
'mobi_ignore_margins': False,
'mobi_keep_original_images': False,
'mobi_toc_at_start': False,
'no_chapters_in_toc': False,
'no_inline_navbars': False,
'no_inline_toc': False,
'output_profile': <calibre.customize.profiles.MSReaderOutput object at 0x04250130>,
'page_breaks_before': u"//*[name()='h1' or name()='h2']",
'personal_doc': u'[PDOC]',
'prefer_author_sort': False,
'prefer_metadata_cover': False,
'pretty_print': False,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': u'C:\\Users\\ANDREW~1\\AppData\\Local\\Temp\\calib re_0.8.47_tmp_hvzlqp\\bmq0bz.opf',
'remove_fake_margins': True,
'remove_first_image': False,
'remove_paragraph_spacing': False,
'remove_paragraph_spacing_indent_size': 1.5,
'renumber_headings': True,
'replace_scene_breaks': u'',
'series': None,
'series_index': None,
'share_not_sync': False,
'smarten_punctuation': False,
'sr1_replace': None,
'sr1_search': None,
'sr2_replace': None,
'sr2_search': None,
'sr3_replace': None,
'sr3_search': None,
'tags': None,
'timestamp': None,
'title': None,
'title_sort': None,
'toc_filter': None,
'toc_threshold': 6,
'toc_title': None,
'unsmarten_punctuation': False,
'unwrap_lines': True,
'use_auto_toc': True,
'verbose': 2}
InputFormatPlugin: MOBI Input running
on C:\Users\ANDREW~1\AppData\Local\Temp\calibre_0.8.4 7_tmp_hvzlqp\f9r3rz.mobi
Extracting text...
Adding anchors...
Extracting images...
Cleaning up HTML...
Parsing HTML...
Converting style information to CSS...
Creating OPF...
Parsing all content...
Parsing styles.css ...
Parsing The_Ultimate-_of_Philosophy.html ...
********* Heuristic processing HTML *********
There are 1133 blank lines. 0.0205242468706 percent blank
minimum chapters required are: 290
found 0 pre-existing headings
common had 146 hits - 146 chapters with no title, 0 chapters with titles, 0.0 percent.
chapter had 2 hits - 2 chapters with no title, 0 chapters with titles, 0.0 percent.
numeric had 55 hits - 55 chapters with no title, 0 chapters with titles, 0.0 percent.
numeric_title had 13 hits - 13 chapters with no title, 0 chapters with titles, 0.0 percent.
plain_number had 11 hits - 11 chapters with no title, 0 chapters with titles, 0.0 percent.
uppercase had 1488 hits - 1488 chapters with no title, 0 chapters with titles, 0.0 percent.
Marked 0 headings, Searching for common section headings
marked 1 chapters. - INTRODUCTION
marked 2 chapters. - INTRODUCTION
marked 3 chapters. - DEDICATION
marked 4 chapters. - Part 1
marked 5 chapters. - Part 2
marked 6 chapters. - Part 3
marked 7 chapters. - Part 4
marked 8 chapters. - Part 5
marked 9 chapters. - Part 6
marked 10 chapters. - Part 7
marked 11 chapters. - Part 8
marked 12 chapters. - Part 9
marked 13 chapters. - Part 10
marked 14 chapters. - Part 11
marked 15 chapters. - Part 12
marked 16 chapters. - Part 13
marked 17 chapters. - Part 14
marked 18 chapters. - Part 15
marked 19 chapters. - Part 16
marked 20 chapters. - Part 17
marked 21 chapters. - Part 18
marked 22 chapters. - Part 19
marked 23 chapters. - Part 20
marked 24 chapters. - Part 21
marked 25 chapters. - Part 22
marked 26 chapters. - Part 23
marked 27 chapters. - Part 24
marked 28 chapters. - Part 25
marked 29 chapters. - Part 26
marked 30 chapters. - Part 27
marked 31 chapters. - Part 28
marked 32 chapters. - Part 29
marked 33 chapters. - Part 30
marked 34 chapters. - Part 31
marked 35 chapters. - Part 32
marked 36 chapters. - Part 33
marked 37 chapters. - Part 34
marked 38 chapters. - Part 35
marked 39 chapters. - Part 36
marked 40 chapters. - Part 37
marked 41 chapters. - Part 38
marked 42 chapters. - Part 39
marked 43 chapters. - Part 40
marked 44 chapters. - Part 41
marked 45 chapters. - Part 42
marked 46 chapters. - Part 43
marked 47 chapters. - Part 44
marked 48 chapters. - Part 45
marked 49 chapters. - Part 46
marked 50 chapters. - Part 47
marked 51 chapters. - Part 48
marked 52 chapters. - Part 49
marked 53 chapters. - Part 50
marked 54 chapters. - Part 51
marked 55 chapters. - Part 52
marked 56 chapters. - Part 53
marked 57 chapters. - Part 54
marked 58 chapters. - Part 55
marked 59 chapters. - Part 56
marked 60 chapters. - Part 57
marked 61 chapters. - Part 58
marked 62 chapters. - Part 59
marked 63 chapters. - Part 60
marked 64 chapters. - Part 61
marked 65 chapters. - Part 62
marked 66 chapters. - Part 63
marked 67 chapters. - Part 64
marked 68 chapters. - Part 65
marked 69 chapters. - Part 66
marked 70 chapters. - Part 67
marked 71 chapters. - Part 68
marked 72 chapters. - Part 69
marked 73 chapters. - Part 1
marked 74 chapters. - Part 2
marked 75 chapters. - Part 3
marked 76 chapters. - Part 4
marked 77 chapters. - Part 5
marked 78 chapters. - Part 6
marked 79 chapters. - INTRODUCTION
marked 80 chapters. - BOOK I
marked 81 chapters. - BOOK II
marked 82 chapters. - BOOK III
marked 83 chapters. - BOOK IV
marked 84 chapters. - BOOK V
marked 85 chapters. - BOOK VI
marked 86 chapters. - BOOK VII
marked 87 chapters. - BOOK VIII
marked 88 chapters. - BOOK IX
marked 89 chapters. - BOOK X
marked 90 chapters. - DEDICATION
marked 91 chapters. - PREFACE
marked 92 chapters. - INTRODUCTION
marked 93 chapters. - INTRODUCTION
marked 94 chapters. - INTRODUCTION
marked 95 chapters. - PART 1
marked 96 chapters. - PART 2
marked 97 chapters. - PART 3
marked 98 chapters. - PART 4
marked 99 chapters. - PART 5
marked 100 chapters. - PART 6
marked 101 chapters. - PART 7
marked 102 chapters. - PART 8
marked 103 chapters. - PART 9
marked 104 chapters. - PART 10
marked 105 chapters. - PART 11
marked 106 chapters. - PART 12
marked 107 chapters. - BOOK II OF THE PASSIONS
marked 108 chapters. - BOOK III OF MORALS
marked 109 chapters. - PREFACE
marked 110 chapters. - INTRODUCTION
marked 111 chapters. - PREFACE
marked 112 chapters. - PREFACE
marked 113 chapters. - INTRODUCTION
marked 114 chapters. - INTRODUCTION
marked 115 chapters. - BOOK I
marked 116 chapters. - BOOK II
marked 117 chapters. - BOOK IV
marked 118 chapters. - INTRODUCTION
marked 119 chapters. - INTRODUCTION
marked 120 chapters. - INTRODUCTION
marked 121 chapters. - INTRODUCTION
marked 122 chapters. - INTRODUCTION
marked 123 chapters. - INTRODUCTION
marked 124 chapters. - INTRODUCTION
marked 125 chapters. - INTRODUCTION
marked 126 chapters. - INTRODUCTION
marked 127 chapters. - INTRODUCTION
marked 128 chapters. - INTRODUCTION
marked 129 chapters. - INTRODUCTION AND ANALYSIS
marked 130 chapters. - INTRODUCTION
marked 131 chapters. - INTRODUCTION
marked 132 chapters. - INTRODUCTION
marked 133 chapters. - INTRODUCTION AND ANALYSIS
marked 134 chapters. - INTRODUCTION AND ANALYSIS
marked 135 chapters. - INTRODUCTION
marked 136 chapters. - INTRODUCTION AND ANALYSIS
marked 137 chapters. - BOOK I
marked 138 chapters. - BOOK II
marked 139 chapters. - BOOK III
marked 140 chapters. - BOOK IV
marked 141 chapters. - BOOK V
marked 142 chapters. - PREFACE
marked 143 chapters. - PREFACE
marked 144 chapters. - PREFACE
marked 145 chapters. - CHAPTER XVII
marked 146 chapters. - CHAPTER XIX
Total wordcount is: 4335642, Average words per section is: 29696, Marked up 146 chapters
Hard line breaks check returned False
Median line length is 1298, calculated with html format
Fixing hyphenated content
Looking for more split points based on punctuation, currently have 146
Formatting scene breaks
Initial parse failed, using more forgiving parsers
Parsing The_Ultimate *****.html as HTML
HTML 5 parsing failed, falling back to older parsers
Traceback (most recent call last):
File "site-packages\calibre\ebooks\oeb\parse_utils.py", line 259, in parse_html
File "site-packages\calibre\ebooks\oeb\parse_utils.py", line 95, in html5_parse
ValueError: html5lib resulted in a tree with nesting depth > 100

Forcing The_Ultimate-_of_Philosophy.html into XHTML namespace
Generating default TOC from spine...
Merging user specified metadata...
Detecting structure...
Detected chapter: Part 1
Detected chapter: Part 2
Detected chapter: Part 3
Detected chapter: Part 4
Detected chapter: Part 5
Detected chapter: Part 6
Detected chapter: Part 7
Detected chapter: Part 8
Detected chapter: Part 9
Detected chapter: Part 10
Detected chapter: Part 11
Detected chapter: Part 12
Detected chapter: Part 13
Detected chapter: Part 14
Detected chapter: Part 15
Detected chapter: Part 16
Detected chapter: Part 17
Detected chapter: Part 18
Detected chapter: Part 19
Detected chapter: Part 20
Detected chapter: Part 21
Detected chapter: Part 22
Detected chapter: Part 23
Detected chapter: Part 24
Detected chapter: Part 25
Detected chapter: Part 26
Detected chapter: Part 27
Detected chapter: Part 28
Detected chapter: Part 29
Detected chapter: Part 30
Detected chapter: Part 31
Detected chapter: Part 32
Detected chapter: Part 33
Detected chapter: Part 34
Detected chapter: Part 35
Detected chapter: Part 36
Detected chapter: Part 37
Detected chapter: Part 38
Detected chapter: Part 39
Detected chapter: Part 40
Detected chapter: Part 41
Detected chapter: Part 42
Detected chapter: Part 43
Detected chapter: Part 44
Detected chapter: Part 45
Detected chapter: Part 46
Detected chapter: Part 47
Detected chapter: Part 48
Detected chapter: Part 49
Detected chapter: Part 50
Detected chapter: Part 51
Detected chapter: Part 52
Detected chapter: Part 53
Detected chapter: Part 54
Detected chapter: Part 55
Detected chapter: Part 56
Detected chapter: Part 57
Detected chapter: Part 58
Detected chapter: Part 59
Detected chapter: Part 60
Detected chapter: Part 61
Detected chapter: Part 62
Detected chapter: Part 63
Detected chapter: Part 64
Detected chapter: Part 65
Detected chapter: Part 66
Detected chapter: Part 67
Detected chapter: Part 68
Detected chapter: Part 69
Detected chapter: Part 1
Detected chapter: Part 2
Detected chapter: Part 3
Detected chapter: Part 4
Detected chapter: Part 5
Detected chapter: Part 6
Detected chapter: BOOK I
Detected chapter: BOOK II
Detected chapter: BOOK III
Detected chapter: BOOK IV
Detected chapter: BOOK V
Detected chapter: BOOK VI
Detected chapter: BOOK VII
Detected chapter: BOOK VIII
Detected chapter: BOOK IX
Detected chapter: BOOK X
Detected chapter: PART 1
Detected chapter: PART 2
Detected chapter: PART 3
Detected chapter: PART 4
Detected chapter: PART 5
Detected chapter: PART 6
Detected chapter: PART 7
Detected chapter: PART 8
Detected chapter: PART 9
Detected chapter: PART 10
Detected chapter: PART 11
Detected chapter: PART 12
Detected chapter: BOOK II OF THE PASSIONS
Detected chapter: BOOK III OF MORALS
Detected chapter: BOOK I
Detected chapter: BOOK II
Detected chapter: BOOK IV
Detected chapter: BOOK I
Detected chapter: BOOK II
Detected chapter: BOOK III
Detected chapter: BOOK IV
Detected chapter: BOOK V
Detected chapter: CHAPTER XVII
Detected chapter: CHAPTER XIX
Auto generated TOC with 109 entries.
Flattening CSS and remapping font sizes...
Source base font size is 18.00000pt
Removing fake margins...
Parsing stylesheet.css ...


Calibre generates a default TOC from the spine. The only conclusion you can reach is the following:

1. When X piece of software DeDRM's a large file, it somehow damages the spine or renders the spine unreadable. This in turn makes it unconvertible. This conversion was carried out using heuristics.
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Old 04-19-2012, 03:52 PM   #40
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Quote:
Originally Posted by ace_765 View Post
Calibre generates a default TOC from the spine. The only conclusion you can reach is the following:

1. When X piece of software DeDRM's a large file, it somehow damages the spine or renders the spine unreadable. This in turn makes it unconvertible. This conversion was carried out using heuristics.
I think you may have reached an erroneous conclusion, but if that's what you think is happening, the place to raise it is at the source of the DeDRM software.
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Old 04-19-2012, 04:47 PM   #41
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Conclusion
So what is the right conclusion?
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Old 04-19-2012, 04:56 PM   #42
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So what is the right conclusion?

I wouldn't like to speculate very much as to the right conclusion, i.e. the root cause of the problems you're seeing, as it could be any of many things.

But it's most unlikely to be the DRM removal software, as for ePubs, removing the DRM is simply a case of decrypting the encrypted files.

If I had to speculate I'd suggest that the problem existed in the original file.
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Old 04-19-2012, 05:02 PM   #43
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Smile Conclusion (contd)
This same DeDRM'd file can be viewed by Calibre but not converted by it, which suggests that you are right.

So there must be a problem DURING the conversion process, which goes back to what I said earlier that it is a programming-related issue.

Damage must occur when Calibre extracts the data (from a DeDRM'd file) and tries to re-compile it.

I'll test this theory on a large, non DeDRM'd file and let you know Or, the original file may be corrupt/damaged, which as a programmer, I know a lot about. You may be right about there being a problem with the original file. Not that I produce corrupt files, more that I have had a fair amount of experience with them
Last edited by ace_765; 04-19-2012 at 05:15 PM.
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Old 04-20-2012, 11:33 AM   #44
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spine is empty fix
I usually see it in rar files with html content. The opf file has a bad spine reference. You can read them just fine, but they won't convert.
You can delete the reference, or just delete the whole OPF file. Calibre generates a new one.

This cause has nothing to do with deDREM software. I would think just ignoring this error would fix it, or regenerating the OPF file.
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Old 07-01-2012, 02:37 PM   #45
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Once I extracted the opf file (with WinRAR), i was able to add and convert the rar file to epub just fine with calibre. I found that when I convert just the html file, the logos etc were missing.
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