Muxer wav [WAV / WAVE (Waveform Audio)]:
    Common extensions: wav.
    Mime type: audio/x-wav.
    Default audio codec: pcm_s16le.
WAV muxer AVOptions:
-write_bext        <int>        E..... Write BEXT chunk. (from 0 to 1)
-rf64              <int>        E..... Use RF64 header rather than RIFF for large files. (from -1 to 1)
   auto                         E..... Write RF64 header if file grows large enough.
   always                       E..... Always write RF64 header regardless of file size.
   never                        E..... Never write RF64 header regardless of file size.

