.TH BLIND-REWRITE-HEAD 1 blind
.SH NAME
blind-rewrite-head - Rewrite the head of a video
.SH SYNOPSIS
.B blind-rewrite-head
[-h]
.I file
.RI [( frames
|
.RB ' auto ')
.RI [( width
|
.RB ' same ')
.RI ( height
|
.RB ' same ')
.RI [ format
|
.RB ' same ']]]
.SH DESCRIPTION
.B blind-rewrite-head
rewrites the head in the video
.IR file .
.I file
must be a regular file. The new
head will specify the choosen number of
.IR frames ,
the choosen
.I width
and
.IR height ,
and the choosen pixel
.IR format .
If
.B ' same '
is choosen as the
.IR width ,
.IR height ,
or
.IR format ,
.B blind-rewrite-head
will use the values specified in
.IR file 's
head. If
.B ' auto '
is choosen as the number of
.IR frames ,
the number of frames will be calculated from
the length of the file, its geometry, and
pixel format.
.SH OPTIONS
.TP
.B -h
Used if the video file does not have a head.
This of course means that
.RB ' same '
cannot be used as there is not way to know
the geometry or format of the video if it does
not have a head.
.SH RETIONALE
.B blind-rewrite-head
only support regular files because combining
.BR blind-read-head (1),
.BR blind-write-head (1),
and
.BR cat (1)
is sufficient for doing the same operation on pipes,
but not on regular files that are too large to store
two copies of on disc.
.SH SEE ALSO
.BR blind (7),
.BR blind-from-video (1),
.BR blind-split (1),
.BR blind-read-head (1),
.BR blind-write-head (1),
.BR blind-transpose (1)
.SH AUTHORS
Mattias Andrée
.RI < maandree@kth.se >