@item hls_fmp4_init_filename @var{filename}
Set filename to the fragment files header file, default filename is @file{init.mp4}.
-@item hls_fmp4_init_resend @var{filename}
+@item hls_fmp4_init_resend
Resend init file after m3u8 file refresh every time, default is @var{0}.
When @code{var_stream_map} is set with two or more variant streams, the