Salve, this is the size report for the current PDF output:
info: This is pdfsizeopt.py rUNKNOWN. info: computing statistics for PDF: /ubuntu-manual-beta.pdf info: PDF size is 4854757 bytes info: stat contents_objs = 354956 bytes (7%) info: stat font_data_objs = 80251 bytes (2%) info: stat header = 15 bytes (0%) info: stat image_objs = 4106007 bytes (85%) info: stat linearized_xref = 0 bytes (0%) info: stat other_objs = 260003 bytes (5%) info: stat separator_data = 24 bytes (0%) info: stat trailer = 49 bytes (0%) info: stat wasted_between_objs = 0 bytes (0%) info: stat xref = 53452 bytes (1%) It shows, the low hanging fruit is in the images (85%). The codec options for images are JPG and PNG. I would go JPG on a case-by-case basis (everything with photos or large desktop background in it) and PNG by default. 24-bit PNG is a waste for screenshots in general. If the shot »needs« 24-bit, then it should be JPG. Otherwise I recommend to automatically quantize with a good quantizer and dither (i.e. not Floyd-Steinberg or random). This works well: https://code.launchpad.net/~exoticorn/+junk/exoquant $ exoquant -v -n 48 screenshots/en/*.png For discussion and other (less automated) methods see: http://xiphmont.livejournal.com/35634.html This saves 60% file size at negligible visual deterioration. Then, switching XeTeX (via setting in dvipdfmx.cfg2) to use PDF version 1.6 saves another 260k. Result: 1.8 MB vs. 4.9 MB info: This is pdfsizeopt.py rUNKNOWN. info: computing statistics for PDF: /ubuntu-manual/main.pdf info: PDF size is 1715143 bytes info: stat contents_objs = 355569 bytes (21%) info: stat font_data_objs = 96548 bytes (6%) info: stat header = 15 bytes (0%) info: stat image_objs = 950772 bytes (55%) info: stat linearized_xref = 0 bytes (0%) info: stat other_objs = 259314 bytes (15%) info: stat separator_data = 24 bytes (0%) info: stat trailer = 49 bytes (0%) info: stat wasted_between_objs = 0 bytes (0%) info: stat xref = 52852 bytes (3%) info: end of stats The exoquant run could be put into the Makefile, but there may be images that need more colors than 48, so I dunno. Exoquant preserves alpha channel so semi-transparent figures are possible. --Tobias
<<attachment: quantized-example.png>>
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