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Old 08-19-2020, 10:18 AM   #1
Sarmat89
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PNG images lost in conversion
I'm trying to convert an EPUB file to the FB2 format. All PNG images are converted into JPEG for some reason.

The conversion log:

Code:
J:\Calibre Portable\Calibre\app\pylib.zip\dateutil\parser.py:601: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
Conversion options changed from defaults:
  verbose: 2
  filter_css: u',color,padding-top,padding-left,background-color,padding-right,padding,padding-bottom,background'
  sectionize: u'nothing'
  fb2_genre: u'sf_fantasy'
  chapter: u"//*[((name()='h1' or name()='h2' or name()='h3' or name()='h4' or name()='h5') and re:test(., '\\s*((chapter|book|section|part|\u0447\u0430\u0441\u0442\u044c|\u0433\u043b\u0430\u0432\u0430|\u043a\u043d\u0438\u0433\u0430)\\s+)|([IVX0-9]+\\.\\s+)|((prolog|prologue|epilogue|\u043f\u0440\u0435\u0434\u0438\u0441\u043b\u043e\u0432\u0438\u0435|\u043f\u0440\u043e\u043b\u043e\u0433|\u044d\u043f\u0438\u043b\u043e\u0433)(\\s+|$))', 'i')) or @class = 'chapter']"
  read_metadata_from_opf: u'%TEMP%\\calibre_dzsy1r\\gl_4da.opf'
  cover: u'%TEMP%\\calibre_dzsy1r\\lompf9.jpeg'
  output_profile: 'generic_eink'
Resolved conversion options
calibre version: 3.38.1
{'asciiize': False,
 'author_sort': None,
 'authors': None,
 'base_font_size': 0.0,
 'book_producer': None,
 'change_justification': u'original',
 'chapter': u"//*[((name()='h1' or name()='h2' or name()='h3' or name()='h4' or name()='h5') and re:test(., '\\s*((chapter|book|section|part|\u0447\u0430\u0441\u0442\u044c|\u0433\u043b\u0430\u0432\u0430|\u043a\u043d\u0438\u0433\u0430)\\s+)|([IVX0-9]+\\.\\s+)|((prolog|prologue|epilogue|\u043f\u0440\u0435\u0434\u0438\u0441\u043b\u043e\u0432\u0438\u0435|\u043f\u0440\u043e\u043b\u043e\u0433|\u044d\u043f\u0438\u043b\u043e\u0433)(\\s+|$))', 'i')) or @class = 'chapter']",
 'chapter_mark': u'pagebreak',
 'comments': None,
 'cover': u'%TEMP%\\calibre_dzsy1r\\lompf9.jpeg',
 'debug_pipeline': None,
 'dehyphenate': True,
 'delete_blank_paragraphs': True,
 'disable_font_rescaling': False,
 'duplicate_links_in_toc': False,
 'embed_all_fonts': False,
 'embed_font_family': None,
 'enable_heuristics': False,
 'expand_css': False,
 'extra_css': None,
 'fb2_genre': u'sf_fantasy',
 'filter_css': u',color,padding-top,padding-left,background-color,padding-right,padding,padding-bottom,background',
 '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 0x02E71510>,
 '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,
 'no_chapters_in_toc': False,
 'no_inline_navbars': False,
 'output_profile': <calibre.customize.profiles.GenericEink object at 0x02E71710>,
 'page_breaks_before': u'/',
 'prefer_metadata_cover': False,
 'pretty_print': False,
 'pubdate': None,
 'publisher': None,
 'rating': None,
 'read_metadata_from_opf': u'%TEMP%\\calibre_dzsy1r\\gl_4da.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': '[]',
 'sectionize': u'nothing',
 'series': None,
 'series_index': None,
 '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,
 'transform_css_rules': '[]',
 'unsmarten_punctuation': False,
 'unwrap_lines': True,
 'use_auto_toc': False,
 'verbose': 2}
InputFormatPlugin: EPUB Input running
on %TEMP%\calibre_dzsy1r\gygeqr.epub
Parsing all content...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/main.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Styles/sgc_styles.css ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Styles/main.css ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Parsing OEBPS/Text/blah.xhtml ...
Reading TOC from NCX...
Merging user specified metadata...
Detecting structure...
Flattening CSS and remapping font sizes...
Filtering CSS properties: , background-color, padding-left, padding-top, background, padding-bottom, padding, padding-right, color
Source base font size is 12.00000pt
Removing fake margins...
Found 8 items of level: p_2
Found 1086 items of level: p_1
Found 46 items of level: div_1
Found 1 items of level: div_2
Ignoring level p_2
p_1  left margin stats: Counter({u'0': 1086})
p_1  right margin stats: Counter({u'0': 1086})
div_1  left margin stats: Counter()
div_1  right margin stats: Counter()
div_2  left margin stats: Counter()
div_2  right margin stats: Counter()
Cleaning up manifest...
Trimming unused files from manifest...
Creating FB2 Output...
Rasterizing SVG images...
Converting XHTML to FB2 markup...
Converting OEBPS/Text/main.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
Converting OEBPS/Text/blah.xhtml to FictionBook2 XML
FB2 output written to %TEMP%\calibre_dzsy1r\j76xqm.fb2
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Old 08-19-2020, 11:15 AM   #2
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Quote:
Originally Posted by Sarmat89 View Post
I'm trying to convert an EPUB file to the FB2 format. All PNG images are converted into JPEG for some reason.
I was under the impression that a FB2 ebook file stored images as Base64 encoded blobs. Personally, I was not impressed the one time I converted some epubs to fb2 for a friend. A simple epub with 7 or 8 full page images went from 12.8MiB to 207.4Mib.

Just looked at that old conversion and the Base64 images show as:

6 as <binary id="img_5" content-type="image/png"> ... </binary>

2 as <binary id="img_0" content-type="image/jpeg"> ... </binary>

The original images are 1 GIF, 1 TIFF, 4 PNG and 2 JPEG ( 1 of the jpegs is in an svg wrapper). The bolded number varies from 0 to 7.
Last edited by DNSB; 08-19-2020 at 11:25 AM. Reason: Added old conversion image type comment
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Old 08-19-2020, 11:16 AM   #3
kovidgoyal
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The only way that can happen is if your png files dont have png mimetypes/extensions.
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Old 08-19-2020, 11:54 AM   #4
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No, they have png extension and image/png MIME type.
Here is an example file which illustrates the problem.
Attached Files
File Type: epub test.epub (2.2 KB, 190 views)
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Old 08-19-2020, 12:43 PM   #5
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Quote:
Originally Posted by Sarmat89 View Post
No, they have png extension and image/png MIME type.
Here is an example file which illustrates the problem.
I have to agree something odd is happening here. The filetype is showing as jpeg in the converted FB2 file. I then wrapped the image in svg and the file type showed as png. I've attached the two FB2 output files in a .zip file.

Over to the devs...

Code:
    <svg xmlns="http://www.w3.org/2000/svg" height="100%" preserveAspectRatio="xMidYMid meet" version="1.1" viewBox="0 0 75 27" width="100%" xmlns:xlink="http://www.w3.org/1999/xlink"><image height="75" width="27" xlink:href="../Images/image.png"/></svg>
  </div>
Last edited by DNSB; 08-19-2020 at 01:45 PM.
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Old 08-19-2020, 01:11 PM   #6
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Converts to PNG for me, see attached. What OS/calibre version?
Attached Files
File Type: zip test.fb2.zip (888 Bytes, 192 views)
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Old 08-19-2020, 01:12 PM   #7
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From your log I see you are using 3.38, that's no longer supported. Upgrade.
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Old 08-21-2020, 05:24 PM   #8
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Good, I see it was fixed.
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