Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
I'm having trouble running this command on some large tifss. It appears to work on the tiffs as long as they are under 2 GB as soon as they go over it stops working.
Also noteworthy is the fact that I seem to have this problem with morgify as well but not the convert command.
I read somewhere that it might be possible to fix this using bigTiff. If that is the case, how do I compile image magick with big tiff on windows? I have already completed a standard compile using VS.
Last edited by GiantCowFilms on 2017-03-08T11:44:40-07:00, edited 1 time in total.
Yeah, that wasn't my actual value (which is generated by some code that runs the command), so I tried to give an example of a valid one from memory, but clearly that didn't work. I can assure you the actual value is valid.
GiantCowFilms wrote: ↑2017-03-07T18:41:53-07:00
I'm having trouble running this command on some large tifss. It appears to work on the tiffs as long as they are under 2 GB as soon as they go over it stops working.
Also noteworthy is the fact that I seem to have this problem with morgify as well but not the convert command.
I read somewhere that it might be possible to fix this using bigTiff. If that is the case, how do I compile image magick with big tiff on windows? I have already completed a standard compile using VS.
I never managed to make any version of IM work with really big TIff pictures. The TIFF format uses 32bit offsets, and as such, it is limited to 4 gigabytes. Many implementations handle these offsets using signed integers, and thus support files of up to 2 gigabytes, but the only real limit resulting from the format specification is 4 gigabytes. I'm pretty sure the IM integrer (IM uses libtiff iirc) is somehow limited to 2GB. I ended up converting my TIFF files > 2GB with Irfanview into uncompressed PNGs. The PNG integrer is so capacious that you're never gonna reach any kind of limits.
glennrp wrote: ↑2017-03-08T17:21:31-07:00
PNG is also limited to 2Gx2G
Yes, but I think the file size and the file dimensions have been kinda mixed up here. In theory, the PNG integrer allows files as large as 4.61 Exa-pixels (!) (the 2Gx2G dimension you mentioned) but I'm not sure if there's a proper limit for the file size itself.
It seems IM fails to handle TIFF files over 2GB (the file size, whatever the dimensions of the picture), which was the point of this topic. It's probably related to the libtiff library. On the other hand, IM handles huge PNG files without breaking a sweat (as long as there's enough RAM available of course). I tried a couple of v6 and v7 versions on different computers and it seems to always be the case
You have to add the libtiff delegate to Imagemagick, not Imagick. If it was a bundle, then you probably cannot change it. You would have to rebuild Imagemagick from source and include all the current delegates plus add bigtiff delegate.
