parse: add support for non-seekable streams

[sbraz]

Currently, the parse() method supports file-like objects but they have to be seekable: https://github.com/sbraz/pymediainfo/blob/5ccb77050af8d88feae5847e584ca1652d25e077/pymediainfo/init.py#L480-L483

The mediainfo binary is able to parse piped input so I assume the library supports non-seekable streams.

@jeromemartinez, how would I go about implementing this? Do I naively ignore MediaInfo_Open_Buffer_Continue_GoTo_Get and pass an arbitrary size to MediaInfo_Open_Buffer_Continue like this? It works with a test stream but I'm not sure it's the right way :D

diff --git a/pymediainfo/__init__.py b/pymediainfo/__init__.py
index 5cce5fa..852c2b3 100644
--- a/pymediainfo/__init__.py
+++ b/pymediainfo/__init__.py
@@ -457,13 +457,8 @@ class MediaInfo:
                 )
             for option_name, option_value in mediainfo_options.items():
                 lib.MediaInfo_Option(handle, option_name, option_value)
-        try:
-            filename.seek(0, 2)
-            file_size = filename.tell()
-            filename.seek(0)
-        except AttributeError:  # filename is not a file-like object
-            file_size = None
 
+        file_size = 2**64 - 1
         if file_size is not None:  # We have a file-like object, use the buffer protocol:
             # Some file-like objects do not have a mode
             if "b" not in getattr(filename, "mode", "b"):
@@ -476,13 +471,6 @@ class MediaInfo:
                     # 4th bit = finished
                     if lib.MediaInfo_Open_Buffer_Continue(handle, buffer, len(buffer)) & 0x08:
                         break
-                    # Ask MediaInfo if we need to seek
-                    seek = lib.MediaInfo_Open_Buffer_Continue_GoTo_Get(handle)
-                    # https://github.com/MediaArea/MediaInfoLib/blob/v20.09/Source/MediaInfoDLL/MediaInfoJNI.cpp#L127
-                    if seek != ctypes.c_uint64(-1).value:
-                        filename.seek(seek)
-                        # Inform MediaInfo we have sought
-                        lib.MediaInfo_Open_Buffer_Init(handle, file_size, filename.tell())
                 else:
                     break
             lib.MediaInfo_Open_Buffer_Finalize(handle)