Error when converting a PDF to any format

[dstone]

For Calibre 3.20.0 on W10 (also happening on Ubuntu):

Converting a 8.8Mb PDF to AZW3 (or MOBI) I get the following error:

... truncating top of log file

Creating KF8 output
Generating in-line ToC
Generating KF8 markup...
Compressing markup...
Creating indices...
Python function terminated unexpectedly
'H' format requires 0 <= number <= 65535 (Error Code: 1)
Traceback (most recent call last):
File "site.py", line 101, in main
File "site.py", line 78, in run_entry_point
File "site-packages\calibre\utils\ipc\worker.py", line 195, in main
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 33, in gui_convert_override
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 26, in gui_convert
File "site-packages\calibre\ebooks\conversion\plumber.py", line 1252, in run
File "site-packages\calibre\ebooks\conversion\plugins\mobi_ou tput.py", line 329, in convert
File "site-packages\calibre\ebooks\mobi\writer8\mobi.py", line 342, in write
struct.error: 'H' format requires 0 <= number <= 65535

It took almost 4 hours to process this 8.8Mb file, and produced over 100,000 1K blank images in each of the 4 log directories (approx. 450,000 1K images). So I'd call that a bug somewhere.

[kovidgoyal]

That's an error specific to MOBI not any format and its becaue the input document contains too many images for the MOBI format to handle.

[dstone]

OK, I counted. It's a 241 page document with 141 images. What's the limit in MOBI? Please note that I also tried in AZW3, and it also generated 450K image files in the logs (I'm going to stop logging as deleting this takes a while).

[kovidgoyal]

THe images you see in a PDF viewer are not neccessarily all the actual images in the document. PDF is layered and often has images behind a text layer or vice versa, particularly in PDFs created from page scans.

[dstone]

Kovid,

This is not a scanned book. The structure really is just text and images. I tried converting to AZW3, and got the exact same error. Here's the full text of the error:

Spoiler:

calibre, version 3.20.0 (win32, embedded-python: True)
Conversion error: Failed: Convert book 1 of 1 (Learning Bootstrap 4)

Convert book 1 of 1 (Learning Bootstrap 4)
Conversion options changed from defaults:
linearize_tables: True
cover: u'C:\\Users\\dstone\\AppData\\Local\\Temp\\calibre _t2ti_m\\t2vzf6.jpeg'
verbose: 2
read_metadata_from_opf: u'C:\\Users\\dstone\\AppData\\Local\\Temp\\calibre _t2ti_m\\yzi8t_.opf'
output_profile: 'kindle_pw3'
Resolved conversion options
calibre version: 3.20.0
{'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': u'C:\\Users\\dstone\\AppData\\Local\\Temp\\calibre _t2ti_m\\t2vzf6.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.InputProfile object at 0x00000260E81352E8>,
'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': True,
'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_toc_at_start': False,
'new_pdf_engine': False,
'no_chapters_in_toc': False,
'no_images': False,
'no_inline_navbars': False,
'no_inline_toc': False,
'output_profile': <calibre.customize.profiles.KindlePaperWhite3Outpu t object at 0x00000260E81359B0>,
'page_breaks_before': u"//*[name()='h1' or name()='h2']",
'prefer_author_sort': False,
'prefer_metadata_cover': False,
'pretty_print': False,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': u'C:\\Users\\dstone\\AppData\\Local\\Temp\\calibre _t2ti_m\\yzi8t_.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'',
'search_replace': '[]',
'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,
'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\dstone\AppData\Local\Temp\calibre_t2ti_m\ f91iw2.pdf
Converting file to html...
pdftohtml log:
Page-1
Page-2
Page-3
Page-4
Page-5
Page-6
Page-7
link to page 15 link to page 15 link to page 21 link to page 21 link to page 21 link to page 21 link to page 22 link to page 22 link to page 22 link to page 22 link to page 22 link to page 22 link to page 23 link to page 23 link to page 23 link to page 23 link to page 23 link to page 23 link to page 23 link to page 23 link to page 24 link to page 24 link to page 24 link to page 24 link to page 25 link to page 25 link to page 26 link to page 26 link to page 26 link to page 26 link to page 26 link to page 26 link to page 26 link to page 26 link to page 27 link to page 27 link to page 27 link to page 27 link to page 28 link to page 28 link to page 28 link to page 28 link to page 28 link to page 28 link to page 28 link to page 28 link to page 28 link to page 28 link to page 29 link to page 29 link to page 30 link to page 30 link to page 30 link to page 30 link to page 30 link to page 30 link to page 31 link to page 31 link to page 31 link to page 31 link to page 31 link to page 31 link to page 32 link to page 32 link to page 32 link to page 32 link to page 33 link to page 33 link to page 33 link to page 33 link to page 35 link to page 35 Page-8
link to page 36 link to page 36 link to page 36 link to page 36 link to page 38 link to page 38 link to page 39 link to page 39 link to page 39 link to page 39 link to page 40 link to page 40 link to page 40 link to page 40 link to page 41 link to page 41 link to page 41 link to page 41 link to page 41 link to page 41 link to page 41 link to page 41 link to page 42 link to page 42 link to page 42 link to page 42 link to page 42 link to page 42 link to page 42 link to page 42 link to page 43 link to page 43 link to page 44 link to page 44 link to page 45 link to page 45 link to page 47 link to page 47 link to page 48 link to page 48 link to page 48 link to page 48 link to page 49 link to page 49 link to page 49 link to page 49 link to page 51 link to page 51 link to page 51 link to page 51 link to page 52 link to page 52 link to page 52 link to page 52 link to page 53 link to page 53 link to page 55 link to page 55 link to page 55 link to page 55 link to page 57 link to page 57 link to page 59 link to page 59 link to page 65 link to page 65 link to page 65 link to page 65 link to page 66 link to page 66 link to page 67 link to page 67 link to page 68 link to page 68 link to page 70 link to page 70 link to page 71 link to page 71 Page-9
link to page 74 link to page 74 link to page 75 link to page 75 link to page 75 link to page 75 link to page 77 link to page 77 link to page 77 link to page 77 link to page 78 link to page 78 link to page 79 link to page 79 link to page 79 link to page 79 link to page 79 link to page 79 link to page 79 link to page 79 link to page 80 link to page 80 link to page 80 link to page 80 link to page 80 link to page 80 link to page 80 link to page 80 link to page 82 link to page 82 link to page 83 link to page 83 link to page 84 link to page 84 link to page 84 link to page 84 link to page 85 link to page 85 link to page 86 link to page 86 link to page 87 link to page 87 link to page 89 link to page 89 link to page 91 link to page 91 link to page 91 link to page 91 link to page 91 link to page 91 link to page 92 link to page 92 link to page 92 link to page 92 link to page 93 link to page 93 link to page 96 link to page 96 link to page 96 link to page 96 link to page 97 link to page 97 link to page 98 link to page 98 link to page 101 link to page 101 link to page 102 link to page 102 link to page 102 link to page 102 link to page 103 link to page 103 link to page 103 link to page 103 link to page 103 link to page 103 link to page 103 link to page 103 link to page 103 link to page 103 Page-10
link to page 104 link to page 104 link to page 104 link to page 104 link to page 105 link to page 105 link to page 105 link to page 105 link to page 106 link to page 106 link to page 106 link to page 106 link to page 108 link to page 108 link to page 108 link to page 108 link to page 109 link to page 109 link to page 109 link to page 109 link to page 110 link to page 110 link to page 110 link to page 110 link to page 112 link to page 112 link to page 112 link to page 112 link to page 113 link to page 113 link to page 114 link to page 114 link to page 115 link to page 115 link to page 115 link to page 115 link to page 116 link to page 116 link to page 117 link to page 117 link to page 118 link to page 118 link to page 118 link to page 118 link to page 119 link to page 119 link to page 119 link to page 119 link to page 119 link to page 119 link to page 120 link to page 120 link to page 121 link to page 121 link to page 122 link to page 122 link to page 124 link to page 124 link to page 124 link to page 124 link to page 125 link to page 125 link to page 126 link to page 126 link to page 127 link to page 127 link to page 128 link to page 128 link to page 128 link to page 128 link to page 129 link to page 129 link to page 131 link to page 131 link to page 131 link to page 131 link to page 132 link to page 132 link to page 134 link to page 134 link to page 134 link to page 134 Page-11
link to page 136 link to page 136 link to page 136 link to page 136 link to page 137 link to page 137 link to page 137 link to page 137 link to page 138 link to page 138 link to page 139 link to page 139 link to page 140 link to page 140 link to page 142 link to page 142 link to page 144 link to page 144 link to page 145 link to page 145 link to page 146 link to page 146 link to page 147 link to page 147 link to page 149 link to page 149 link to page 150 link to page 150 link to page 151 link to page 151 link to page 153 link to page 153 link to page 156 link to page 156 link to page 158 link to page 158 link to page 161 link to page 161 link to page 164 link to page 164 link to page 167 link to page 167 link to page 168 link to page 168 link to page 169 link to page 169 link to page 170 link to page 170 link to page 171 link to page 171 link to page 172 link to page 172 link to page 174 link to page 174 link to page 174 link to page 174 link to page 175 link to page 175 link to page 176 link to page 176 link to page 176 link to page 176 link to page 178 link to page 178 link to page 179 link to page 179 link to page 179 link to page 179 link to page 180 link to page 180 link to page 182 link to page 182 link to page 182 link to page 182 link to page 182 link to page 182 link to page 184 link to page 184 Page-12
link to page 185 link to page 185 link to page 185 link to page 185 link to page 186 link to page 186 link to page 187 link to page 187 link to page 187 link to page 187 link to page 188 link to page 188 link to page 189 link to page 189 link to page 189 link to page 189 link to page 190 link to page 190 link to page 190 link to page 190 link to page 191 link to page 191 link to page 194 link to page 194 link to page 195 link to page 195 link to page 196 link to page 196 link to page 197 link to page 197 link to page 198 link to page 198 link to page 199 link to page 199 link to page 199 link to page 199 link to page 200 link to page 200 link to page 200 link to page 200 link to page 201 link to page 201 link to page 202 link to page 202 link to page 203 link to page 203 link to page 204 link to page 204 link to page 206 link to page 206 link to page 207 link to page 207 link to page 208 link to page 208 link to page 208 link to page 208 link to page 209 link to page 209 link to page 209 link to page 209 link to page 210 link to page 210 link to page 211 link to page 211 link to page 212 link to page 212 link to page 212 link to page 212 link to page 213 link to page 213 link to page 213 link to page 213 link to page 214 link to page 214 link to page 216 link to page 216 link to page 216 link to page 216 Page-13
link to page 217 link to page 217 link to page 220 link to page 220 link to page 220 link to page 220 link to page 221 link to page 221 link to page 223 link to page 223 link to page 225 link to page 225 link to page 226 link to page 226 link to page 227 link to page 227 link to page 227 link to page 227 link to page 227 link to page 227 link to page 227 link to page 227 link to page 228 link to page 228 link to page 228 link to page 228 link to page 229 link to page 229 link to page 230 link to page 230 link to page 230 link to page 230 link to page 231 link to page 231 link to page 231 link to page 231 link to page 231 link to page 231 link to page 232 link to page 232 link to page 232 link to page 232 link to page 232 link to page 232 link to page 233 link to page 233 link to page 233 link to page 233 link to page 233 link to page 233 link to page 233 link to page 233 link to page 234 link to page 234 link to page 234 link to page 234 link to page 234 link to page 234 link to page 235 link to page 235 Page-14
link to page 21 link to page 32 link to page 52 link to page 75 link to page 102 Page-15
link to page 119 link to page 179 link to page 199 link to page 227 link to page 32 Page-16
Page-17
Page-18
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Page-21
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link to page 32 Page-27
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link to page 21 Page-33
Page-34
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link to page 21 Page-39
link to page 21 Page-40
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link to page 32 link to page 32 Page-84
Page-85
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Page-234
link to page 192 link to page 22 link to page 22 link to page 22 link to page 23 link to page 23 link to page 23 link to page 146 link to page 223 link to page 224 link to page 145 link to page 146 link to page 209 link to page 210 link to page 27 link to page 112 link to page 134 link to page 84 link to page 87 link to page 89 link to page 84 link to page 90 link to page 87 link to page 85 link to page 161 link to page 162 link to page 158 link to page 174 link to page 176 link to page 164 link to page 97 link to page 97 link to page 96 link to page 91 link to page 91 link to page 92 link to page 48 link to page 41 link to page 43 link to page 42 link to page 41 link to page 47 link to page 45 link to page 46 link to page 42 link to page 42 link to page 44 link to page 42 link to page 49 link to page 200 link to page 41 link to page 134 link to page 200 link to page 201 link to page 49 link to page 21 link to page 22 link to page 22 link to page 128 link to page 37 link to page 65 link to page 66 Page-235
link to page 65 link to page 24 link to page 36 link to page 36 link to page 212 link to page 214 link to page 115 link to page 116 link to page 174 link to page 174 link to page 38 link to page 38 link to page 119 link to page 216 link to page 217 link to page 125 link to page 126 link to page 124 link to page 119 link to page 185 link to page 189 link to page 185 link to page 22 link to page 149 link to page 153 link to page 154 link to page 151 link to page 152 link to page 156 link to page 157 link to page 150 link to page 151 link to page 147 link to page 148 link to page 197 link to page 195 link to page 194 link to page 196 link to page 228 link to page 227 link to page 234 link to page 231 link to page 231 link to page 234 link to page 230 link to page 232 link to page 233 link to page 232 link to page 232 link to page 229 link to page 231 link to page 230 link to page 228 link to page 233 link to page 233 link to page 228 link to page 121 link to page 137 link to page 138 link to page 132 link to page 191 link to page 192 link to page 190 link to page 208 link to page 186 link to page 209 link to page 153 link to page 154 link to page 171 link to page 82 link to page 83 link to page 80 Page-236
link to page 79 link to page 80 link to page 79 link to page 80 link to page 79 link to page 83 link to page 79 link to page 186 link to page 216 link to page 92 link to page 93 link to page 94 link to page 75 link to page 76 link to page 77 link to page 23 link to page 21 link to page 111 link to page 202 link to page 208 link to page 108 link to page 109 link to page 82 link to page 83 link to page 127 link to page 104 link to page 105 link to page 39 link to page 221 link to page 222 link to page 29 link to page 42 link to page 80 link to page 79 link to page 68 link to page 67 link to page 70 link to page 71 link to page 66 link to page 67 link to page 22 link to page 53 link to page 52 link to page 53 link to page 55 link to page 55 link to page 56 link to page 57 link to page 59 link to page 61 link to page 62 link to page 64 link to page 65 link to page 53 link to page 54 link to page 58 link to page 103 link to page 104 link to page 139 link to page 140 link to page 134 link to page 132 link to page 128 link to page 131 link to page 132 link to page 130 link to page 128 link to page 131 link to page 23 link to page 24 link to page 27 link to page 232 link to page 29 link to page 232 link to page 35 link to page 35 link to page 30 link to page 28 link to page 30 Page-237
link to page 31 link to page 28 link to page 29 link to page 30 link to page 28 link to page 27 link to page 40 link to page 40 link to page 27 link to page 27 link to page 28 link to page 151 link to page 152 link to page 103 link to page 105 link to page 116 link to page 21 link to page 25 link to page 110 link to page 111 link to page 109 link to page 110 link to page 109 link to page 137 link to page 138 link to page 136 link to page 137 link to page 137 link to page 138 link to page 138 link to page 108 link to page 140 link to page 141 link to page 24 link to page 21 link to page 189 link to page 38 link to page 38 link to page 24 link to page 24 link to page 42 link to page 142 link to page 144 link to page 145 link to page 137 link to page 80 link to page 147 link to page 148 link to page 79 link to page 77 link to page 78 link to page 185 link to page 106 link to page 22 link to page 212 link to page 103 link to page 176 link to page 177 link to page 108 link to page 109 link to page 108 link to page 106 link to page 107 link to page 106 link to page 98 link to page 213 link to page 22 link to page 79 Page-238
link to page 213 link to page 206 link to page 179 link to page 180 link to page 77 link to page 171 link to page 173 link to page 174 link to page 170 link to page 169 link to page 168 link to page 167 link to page 168 link to page 33 link to page 27 link to page 33 link to page 33 link to page 26 link to page 33 link to page 34 link to page 35 link to page 207 link to page 208 link to page 121 link to page 213 link to page 48 link to page 176 link to page 175 link to page 103 link to page 204 link to page 126 link to page 189 link to page 188 link to page 186 link to page 189 link to page 188 link to page 187 link to page 103 link to page 122 link to page 121 link to page 137 link to page 138 link to page 132 link to page 23 link to page 102 link to page 26 link to page 26 link to page 91 link to page 26 link to page 102 link to page 230 link to page 116 link to page 78 link to page 36 link to page 36 link to page 22 link to page 51 link to page 28 link to page 199 link to page 204 link to page 200 link to page 137 Page-239
link to page 130 link to page 80 link to page 71 link to page 72 link to page 77 link to page 79 link to page 86 link to page 85 link to page 25 link to page 25 link to page 26 link to page 40 link to page 39 link to page 26 link to page 26 link to page 30 link to page 31 link to page 30 link to page 31 link to page 103 link to page 114 link to page 117 link to page 115 link to page 116 link to page 112 link to page 113 link to page 114 link to page 118 link to page 115 link to page 168 link to page 232 link to page 232 link to page 211 link to page 131 link to page 220 link to page 32 link to page 38 link to page 35 link to page 33 link to page 36 link to page 232 link to page 185 link to page 182 link to page 184 link to page 183 link to page 225 link to page 104 link to page 210 link to page 211 link to page 106 link to page 107 link to page 140 link to page 141 link to page 209 link to page 213 link to page 213 link to page 213 link to page 212 link to page 208 link to page 210 link to page 211 link to page 201 link to page 202 link to page 203 link to page 124 Page-240
link to page 227 link to page 139 link to page 140 link to page 25 Page-241
Retrieving document metadata...
Generating manifest...
Rendering manifest...
Parsing all content...
Parsing index.html ...
Reading TOC from NCX...
Merging user specified metadata...
Detecting structure...
Flattening CSS and remapping font sizes...
Source base font size is 12.00000pt
Removing fake margins...
Found 119854 items of level: p_1
p_1 left margin stats: Counter({u'0': 119854})
p_1 right margin stats: Counter({u'0': 119854})
Cleaning up manifest...
Trimming unused files from manifest...
Creating AZW3 Output...
Serializing resources...
Splitting markup on page breaks and flow limits, if any...
Splitting on page-break at id=calibre_pb_0
Split into 2 parts
Creating KF8 output
Generating in-line ToC
Generating KF8 markup...
Compressing markup...
Creating indices...
Python function terminated unexpectedly
'H' format requires 0 <= number <= 65535 (Error Code: 1)
Traceback (most recent call last):
File "site.py", line 101, in main
File "site.py", line 78, in run_entry_point
File "site-packages\calibre\utils\ipc\worker.py", line 195, in main
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 33, in gui_convert_override
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 26, in gui_convert
File "site-packages\calibre\ebooks\conversion\plumber.py", line 1252, in run
File "site-packages\calibre\ebooks\conversion\plugins\mobi_ou tput.py", line 329, in convert
File "site-packages\calibre\ebooks\mobi\writer8\mobi.py", line 342, in write
struct.error: 'H' format requires 0 <= number <= 65535

[dwig]

Originally Posted by dstone

Kovid,

This is not a scanned book. The structure really is just text and images.

The "book" wasn't originally a PDF. It may have been text and images in the original format and the PDF may look like just text and images, but that doesn't mean that the utility that generated the PDF didn't convert some text entities, or even all of the text, into images.

[dstone]

The book is text with embedded images. It's not a book of images. If you hover over the text, the text cursor appears for seelecting text. If you hover over an image, you can select the image. If I edit the book with a PDF editor, it's text with embedded images, as described above.

[JSWolf]

You have a Paperwhite. Convert to KF8 (AZW3) and forget Mobi even exists.

[dstone]

Originally Posted by JSWolf

You have a Paperwhite. Convert to KF8 (AZW3) and forget Mobi even exists.

Already tried (see previous posts).

[dstone]

And I tried converting to HTML and using that, but that just messes up the format and I still don't get a table of contents.

[BetterRed]

@dstone - in the Read this before Posting PDF Questions sticky at the top of this sub-forum a number of PDF issues are addressed.

At one time I was converting a lot of PDFs (dozens a day). After investigating several alternatives I settled on doing the initial convert with Mobipocket's Creator, and then used calibre to convert the resultant PRC either to EPUB or to RTF. My main objective was to have a consistent process over lots of PDFs rather than an optimal process for one PDF.

BR