ImportError：无法加载共享库，请确保已安装librtmp

Question

I am using Windows 8, and trying to work with python-librtmp. I have followed the steps to install librtmp from here: http://pythonhosted.org/python-librtmp/ . For me, the two pip install lines worked successfully when run in Windows Powershell. After installation, it says the libraries are in c:\\python27\\lib\\site-packages .

Now, I have opened a Python IDE (IDLE), and typed in import librtmp . This is giving me the following error:

Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    import librtmp
  File "C:\Python27\lib\site-packages\librtmp\__init__.py", line 14, in <module>
    from librtmp_ffi.binding import librtmp
  File "C:\Python27\lib\site-packages\librtmp_ffi\binding.py", line 13, in <module>
    raise ImportError("No shared library could be loaded, "
ImportError: No shared library could be loaded, make sure that librtmp is installed.

The binding.py file:

import librtmp_config

from .ffi import ffi
from .verifier import verifier

for path in librtmp_config.library_paths:
    try:
        librtmp = ffi.dlopen(path)
        break
    except OSError:
        pass
else:
    raise ImportError("No shared library could be loaded, "
                      "make sure that librtmp is installed.")

librtmp = verifier.load_library()

The init .py file in librtmp_config folder:

"""Runtime configuration of python-librtmp.

   This module provides access to variables used by this library
   and makes it possible to customize some behaviour before :mod:`librtmp`
   is imported.

"""
__all__ = ["library_paths"]

#: This is a list of filenames that python-librtmp
#: will attempt to dynamically load `librtmp` from.
library_paths = ["librtmp.so", "librtmp.so.0", "librtmp.dll", "librtmp.so.1", "librtmp.dylib"]

I am pretty new to Python, and this is the first time I am using Python in Windows. When I installed librtmp, it said installation is successful. I exactly followed the steps in the above link. I cannot understand, then why it is saying make sure that librtmp is installed .

Is it some path issue or installation issue? I search for a solution online, but nothing helped.

Do I need to install librtmp separately? After some reading I found, librtmp is present in rtmpdump. I have downloaded rtmpdump zip file from windows. But I don't know how to install it. README says, run "make SYS=mingw", but the zip folder has no makefile!

But there is one subfolder in the rtmpdump folder. That folder contains librtmp.dll. If you see above, the init .py mentions one librtmp.dll in its library path. Does this mean, I have to refer to this .dll in the init .py. But I don't know how to do that.

Can you please help?

Answer 1

Resolved!!! I copied librtmp.dll file from the rtmpdump package into C:\\Python27\\DLLs . From the binding.py and the _init_.py file content I figured, python is unable to locate the dll file. But, still I don't know why it could locate the file in the DLLs folder. I just tried it randomly, and it worked!

If anyone of you can explain the logic it would be great!