/home/kyle/software/ffmpeg/source/ffmpeg-git-testing/libavformat/os_support.h: In function 'int utf8towchar(const char*, wchar_t**)':
/home/kyle/software/ffmpeg/source/ffmpeg-git-testing/libavformat/os_support.h:157:57: error: invalid conversion from 'void*' to 'wchar_t*' [-fpermissive]
     *filename_w = av_mallocz(sizeof(wchar_t) * num_chars);
                                                         ^