This is a script based in the one that Mutant Bob wrote in BlenderStackExchange here, in request to a question of mine (aka he did the hard code). Thank him!
- Changes (pose) bone rotation mode - Converts keyframes from one rotation mode to another: - Creates fcurves/keyframes in target rotation mode - Deletes previous fcurves/keyframes. - Converts multiple bones - Converts multiple Actions
EDIT: @draguu fixed the installation as an addon. Thanks!
Here is the GitHub (currently 0.2).
And here I upload a file to test.
IMPORTANT: the file uploaded here has 0.1 version. Please, download last version from Github.