[MPlayer-users] bmovl (error reading commands) ?

[Mike Gibson]

I have no clue about the bmovl filter, but if you're using a fifo, then 
whatever you're using is trying to seek in the fifo, which isn't allowed.

Another name for a fifo is a "named pipe".  So just like the pipes "|" that 
you use on the command line, it takes in data and outputs data, hence the 
name File In File Out (FIFO).  It doesn't store any data itself (except for 
maybe a small buffer (I dunno).  This is why you can't seek in a FIFO.  The 
data is gone.  You might want to try creating a real file, instead of using a 
FIFO.

> hi,
>
> i'm want to use the bmovl filter, but it doesn't work. I alway get an
> error:: vf_bmovl: error reading commands: illegal seek
>
> i start mplayer with bmovl=0:0:filename and i use the fifo format
>
> "RGBA32 100 100 0 0 0 0
> <video data in 4 byte>"
>
> to show a 100x100 pix picture at xy 0/0
>
> Is there something wrong ? Can someone please explain me the fifo format.
>
> Thanks,
> Dennis