PDF>MOBI Random blank pages inserted no matter what I do.

[Xff34]

Hello everyone,
I have an issue I've been dealing with for hours now and I completely don't know what to do anymore.

I have a couple of pdf books (very obscure, scanned, with no other formats available) and I've been trying to convert them into .mobi for a 2016 basic Kindle. I convert because PDFs on Kindle tend to stop working after two dozens of pages or so.

When I convert and view it on the Kindle, I am getting random blank pages approximately every 1-3 pages. For example page 25, blank, page 26, page 27, blank.

It's horribly infuriating and after going through the settings I don't know what's wrong anymore. Most of the PDFs don't contain any text, it's usually only a scanned picture per page.

I have tried .azw3 but when I go through a few pages, the Kindle errors and asks me to redownload the file. I can't open .epub and can't use the send by e-mail function either since it's a borrowed Kindle and I don't have access to the account.

I leave the default settings except the pages I attached to the post where I changed some things (default settings produced blank pages too).

Any help is greatly appreciated, the fact I only need a sequence of images with no text made me wonder if I should try creating a comic book archive and then try converting to .mobi but I don't know how much time it would take and if there's an easier option (or preferably something wrong with my settings ).

Here is the conversion log, but I'm not sure if it helps.

Spoiler:

Convert book 1 of 1 (萌え美少女キャラのつくりかた)
Conversion options changed from defaults:
mobi_ignore_margins: True
prefer_metadata_cover: True
chapter_mark: u'none'
remove_fake_margins: False
read_metadata_from_opf: u'C:\\Users\\V\\AppData\\Local\\Temp\\calibre_hri4 85\\rs4h0b.opf'
verbose: 2
no_inline_toc: True
input_profile: 'kindle'
no_chapters_in_toc: True
cover: u'C:\\Users\\V\\AppData\\Local\\Temp\\calibre_hri4 85\\em5vae.jpeg'
page_breaks_before: u'/'
output_profile: 'kindle'
share_not_sync: True
chapter: u'/'
Resolved conversion options
calibre version: 3.34.0
{'asciiize': False,
'author_sort': None,
'authors': None,
'base_font_size': 0.0,
'book_producer': None,
'change_justification': u'original',
'chapter': u'/',
'chapter_mark': u'none',
'comments': None,
'cover': u'C:\\Users\\V\\AppData\\Local\\Temp\\calibre_hri4 85\\em5vae.jpeg',
'debug_pipeline': None,
'dehyphenate': True,
'delete_blank_paragraphs': True,
'disable_font_rescaling': False,
'dont_compress': False,
'duplicate_links_in_toc': False,
'embed_all_fonts': False,
'embed_font_family': None,
'enable_heuristics': False,
'expand_css': False,
'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.KindleInput object at 0x0000029B4EEB8208>,
'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_file_type': u'old',
'mobi_ignore_margins': True,
'mobi_keep_original_images': False,
'mobi_toc_at_start': False,
'new_pdf_engine': False,
'no_chapters_in_toc': True,
'no_images': False,
'no_inline_navbars': True,
'no_inline_toc': True,
'output_profile': <calibre.customize.profiles.KindleOutput object at 0x0000029B4EEB86A0>,
'page_breaks_before': u'/',
'personal_doc': u'[PDOC]',
'prefer_author_sort': False,
'prefer_metadata_cover': True,
'pretty_print': False,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': u'C:\\Users\\V\\AppData\\Local\\Temp\\calibre_hri4 85\\rs4h0b.opf',
'remove_fake_margins': False,
'remove_first_image': False,
'remove_paragraph_spacing': False,
'remove_paragraph_spacing_indent_size': 1.5,
'renumber_headings': True,
'replace_scene_breaks': u'',
'search_replace': '[]',
'series': None,
'series_index': None,
'share_not_sync': True,
'smarten_punctuation': False,
'sr1_replace': None,
'sr1_search': None,
'sr2_replace': None,
'sr2_search': None,
'sr3_replace': None,
'sr3_search': None,
'start_reading_at': None,
'subset_embedded_fonts': False,
'tags': None,
'timestamp': None,
'title': None,
'title_sort': None,
'toc_filter': None,
'toc_threshold': 6,
'toc_title': None,
'transform_css_rules': '[]',
'unsmarten_punctuation': False,
'unwrap_factor': 0.45,
'unwrap_lines': True,
'use_auto_toc': False,
'verbose': 2}
InputFormatPlugin: PDF Input running
on C:\Users\V\AppData\Local\Temp\calibre_hri485\vzrth b.pdf
Converting file to html...
pdftohtml log:
Page-1
Page-2
Page-3
Page-4
Page-5
Page-6
Page-7
Page-8
Page-9
Page-10
Page-11
Page-12
Page-13
Page-14
Page-15
Page-16
Page-17
Page-18
Page-19
Page-20
Page-21
Page-22
Page-23
Page-24
Page-25
Page-26
Page-27
Page-28
Page-29
Page-30
Page-31
Page-32
Page-33
Page-34
Page-35
Page-36
Page-37
Page-38
Page-39
Page-40
Page-41
Page-42
Page-43
Page-44
Page-45
Page-46
Page-47
Page-48
Page-49
Page-50
Page-51
Page-52
Page-53
Page-54
Page-55
Page-56
Page-57
Page-58
Page-59
Page-60
Page-61
Page-62
Page-63
Page-64
Page-65
Page-66
Page-67
Page-68
Page-69
Page-70
Page-71
Page-72
Page-73
Page-74
Page-75
Page-76
Page-77
Page-78
Page-79
Page-80
Page-81
Page-82
Page-83
Page-84
Page-85
Page-86
Page-87
Page-88
Page-89
Page-90
Page-91
Page-92
Page-93
Page-94
Page-95
Page-96
Page-97
Page-98
Page-99
Page-100
Page-101
Page-102
Page-103
Page-104
Page-105
Page-106
Page-107
Page-108
Page-109
Page-110
Page-111
Page-112
Page-113
Page-114
Page-115
Page-116
Page-117
Page-118
Page-119
Page-120
Page-121
Page-122
Page-123
Page-124
Page-125
Page-126
Page-127
Page-128
Page-129
Page-130
Page-131
Page-132
Page-133
Page-134
Page-135
Page-136
Page-137
Page-138
Page-139
Page-140
Page-141
Page-142
Page-143
Page-144
Page-145
Page-146
Page-147
Page-148
Page-149
Page-150
Page-151
Page-152
Page-153
Page-154
Page-155
Page-156
Page-157
Page-158
Page-159
Page-160
Retrieving document metadata...
Generating manifest...
Rendering manifest...
Parsing all content...
Parsing index.html ...
Generating default TOC from spine...
Merging user specified metadata...
Detecting structure...
Auto generated TOC with 0 entries.
Flattening CSS and remapping font sizes...
Source base font size is 16.00000pt
Cleaning up manifest...
Trimming unused files from manifest...
Creating MOBI Output...
Serializing resources...
Creating MOBI 6 output
Applying case-transforming CSS...
Parsing manglecase.css ...
Rasterizing SVG images...
Converting XHTML to Mobipocket markup...
Serializing markup content...
Compressing markup content...
No TOC, MOBI index not generated
MOBI output written to C:\Users\V\AppData\Local\Temp\calibre_hri485\pvxqa p.mobi

[kovidgoyal]

you are likely getting the blank pages because a bit of the image extends beyond the page. The best way to convert image only books is to first convert them to cbz files and trhen convert those in calibre. there are plenty of tools available that will extract all the images from a PDF file