[Libav-user] WMV saving with av_guess_format

[Gonzalo Garramuno]

I have a routine that saves a movie from sequential frames.
However, when the filename is a .wmv file, av_guess_format
seems to return a corrupt context.  The result of saving is
a movie file with just 3 frames.
I also tried muxing.c from head but it did not compile.  After a change 
in defines I could make it compile but when running it it returns 
sample_fmt not supported for wmv.