[Solved]Simulate keypress TProcess.

[lucamar]

[...] however I have not found any examples how I can use Tprocess as a kind of wrapper (meaning have the pipe open and controlling the executable) for an application.

There are examples (and pointers to others) in the wiki page about Executing External Programs.

[chrnobel]

Ok, after doing quite some investigation I have found a solution here:

https://serverfault.com/questions/178457/can-i-send-some-text-to-the-stdin-of-an-active-process-running-in-a-screen-sessi

It can be boiled down to this:

First I start the program like this:

(while [ 1 ]; do sleep 1; done) | omxplayer Engl.mov

Then I can control it via the process id like this:

echo -n p > /proc/$(pgrep omxplayer)/fd/0

The outstanding part now to find a way to discover when omxplayer is at last frame (as the omxplayer never is released due to the endless loop), so a rewind can be sent to all players, and combine it into to a program controlled over the network, which can be done by a multicast.