[MPlayer-users] MPlayer hangs in slave mode on Windows

[wm4]

On Sat, 13 Dec 2014 20:45:26 +0100
Reimar Döffinger <Reimar.Doeffinger at gmx.de> wrote:

> On 13.12.2014, at 17:37, Anton Sviridenko <anton at corp.bluecherry.net> wrote:
> > I am using r37337 build by Redxii from mplayerwin.sf.net. Exactly the
> > same build works perfectly when it is being run by SMPlayer.
> > 
> > But I observe this behavior - when I try to run mplayer from cmd.exe
> > and set -slave switch, mplayer starts, shows video window with first
> > frame and then hangs (Windows shows "not responding, cursors starts
> > rotating, etc). I found accidentally that if I press Enter in cmd.exe
> > console it starts playing until mouse click on video window. Then it
> > hangs again.I also tried to run mplayer in slave mode from Cygwin
> > console and it plays without hangs there.
> > 
> > I'm trying to use mplayer in slave mode  for playing videos inside
> > application I develop and it hangs probably due to same reason.

Are you using the gl VO by any chance?

> I you use slave mode you must connect stdin to a proper file/pipe where read, select etc. works in the expected way.
> In the normal command-line stdin is connect to a console which is a horrible and crazy construct that behaves in no sane way, so all kinds of strange effects happen (since -slave disables the workarounds we use to read keyboard input from it).

select() works only on sockets on windows.

I'm pretty sure most slavemode hosts just use some form of pipe that
can't be selected and on which even overlapped IO is not possible.