madshi bug tracker - eac3to
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0000288eac3tobugpublic2015-05-04 01:462018-03-11 18:06
nautilus7 
madshi 
normalmajoralways
assignedopen 
3.29
0000288: Cannot extract pgs/sup subtitles from mkv files
PGS/SUP subtitles cannot be demuxed correctly from mkv files. This happens with all files I have tried. It's happening now for quite a long time, if not forever.

Only way to demux pgs/sup from mkv is using mkvextract, since eac3to outputs a broken file.
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Issue History
2015-05-04 01:46nautilus7New Issue
2018-03-11 08:16mkverNote Added: 0002242
2018-03-11 18:06madshiNote Added: 0002243
2018-03-11 18:06madshiAssigned To => madshi
2018-03-11 18:06madshiStatusnew => assigned

Notes
(0002242)
mkver   
2018-03-11 08:16   
eac3to currently ignores whether the track in the Matroska file has been compressed (picture based subtitles are very compressible, so mkvmerge uses zlib compression for them by default) and simply extracts the data out of the file as is; it does not decompress it at all.
(0002243)
madshi   
2018-03-11 18:06   
That makes sense, eac3to doesn't support zlib decompression atm.