usingFileName() with original file extension

[adbhutagaurangadas]

While using addAllMediaFromRequest() or addMediaFromUrl() is there any possibility now to set custom file name with the original file extension? I have not found yet.

[adbhutagaurangadas]

You have moved this to discussions, but I meant that it is not proper behaviour for these functions. Suppose, I upload several files, and they are not necessary jpgs. Now I'm using addAllMediaFromRequest() on server side, and I want files to have some specific names. For example, I want 'abc.original_extension' for the main file. My conversions will be named as 'abc-conversion_name.jpg'. This works. But how about the main file? How can I know the original extension? I think that the proper behaviour could be setting only the name before dot with usingFileName(), but extension should remain automatically as it is in original file.
If I use now usingFileName('abc') I'm getting right conversion names, but main file sets to 'abc' without extension. And there is no way to find out and set the original extension inside FileAdder.