In fact, we need to convert the WMA audio file to FLAC. But there is a lack of ways to convert WMA to more convenient formats. Can you recommend us a library that can help us, or something like that?
You need JAVE :
The JAVE library (Java Audio Video Encoder) is the Java wrapper for the ffmpeg project. Developers can take advantage of JAVE to transcode audio and video files from a format to another. In the example, you can transcode the AVI file to MPEG one, you can change the DivX video stream (for example, to YouTube) Flash FLV, you can convert WAV to MP3 or Ogg Vorbis, you can split and transcode audio and video tracks, you can change the video size , changing their sizes and proportions and so on. Many other formats, containers, and operations are supported by JAVE.
MFSampledSP supports WMA. It is suitable for Windows 7 or later.