although I haven’t tested to call ffmeg from a commandline, I guess here we have exactly the problem I was refering to in my other posting. I will check. As I need some sleep, I will do that tomorrow.
rmember that there are also multiple types of wma. regular wma, wma pro, wma voice, wma lossless… afaik, only “regular” wma decoders are available on non-windows platforms.