When PIL is installed 64-bit in win7 python2.7, a message indicating JPEG support not available is displayed.

When PIL is installed 64-bit in python2.7 under win7, a message is displayed, such as JPEG support not available, indicating that the image Connection Library is unavailable,

The error message returned when the error message does not exist in 32-Bit mode. The solution is as follows:

1. Download PIL source code http://www.pythonware.com/products/pil/

Decompress the package to d: \ temp \ PIL.

2. Solve JPEG support

Download idea

Decompress the package to d: \ temp \ jpeg.

Modify jconfig. vc to jconfig. h and makefile. vc to makefile.

Prompt for running Visual Studio 2008x64 Win64 command

Enter the d: \ temp \ jpeg directory, and then enter nmake clean all

Copy all the files under d: \ temp \ jpeg to the Directory d: \ temp \ PIL \ lib \ jpeg (created under the directory)

In d: \ temp \ PIL \ setup. py, set cmd_root to cmd_root = "D:/test/PIL/lib/jpeg"

Then run cmd to enter the d: \ temp \ PIL directory and run python setup. py build.

3. Solve PNG support

Download the latest source code from http://zlib.net/to d:?temp=zlib

Find the d: \ test \ zlib \ contrib \ vstudio \ vc9 \ zlibstat. vcproj file, open it in notepad, replace all zlib_winapis; empty

Double-click d: \ test \ zlib \ contrib \ vstudio \ vc9 \ zlibvc. sln to open

Choose "generate"> "Configuration Manager"> "Active solution platform"> "add x64" from the drop-down list.

Compile the solution

Prompt for running Visual Studio 2008x64 Win64 command

Enter d: \ temp \ zlib and enter nmake-f win32 \ Makefile. msc AS = ml64 LOC = "-DASMV-DASMINF-I." OBJA = "inffasx64.obj gvmat64.obj inffas8664.obj"

Copy all files under d: \ temp \ zlib and d: \ test \ zlib \ contrib \ vstudio \ vc9 \ x64 \ Release to d: \ temp \ PIL \ lib \ zlib directory

Modify ZLIB_ROOT in d: \ temp \ PIL \ setup. py to ZLIB_ROOT = "D:/test/PIL/lib/zlib"

Then run cmd to enter the d: \ temp \ PIL directory and run python setup. py build.