qt4 - Is there a command to stop and pause mplayer using the PId? -

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i playing mplayer qt application using play button. have 2 buttons called pause , stop. play button used system ("mplayer "+s.toascii()+"&"); s playlist.

for pause button used system("p"); not working. able store process id of mplayer text file using system("ps -a |grep mplayer > pid.txt");.

is there command stop , pause mplayer using pid?

what want mplayer's slave mode of input, makes easy give commands program. can launch mplayer in mode giving -slave command line option when launching it.

in mode, mplayer ignores standard input bindings , instead accepts different vocabulary of text commands can sent 1 @ time separated newlines. full list of commands supported, run mplayer -input cmdlist.

since have tagged question qt, i'm going assume using c++. here's example program in c demonstrating how use mplayer's slave mode:

#include <stdio.h> #include <unistd.h>  int main() {     file* pipe;     int i;      /* open mplayer child process, granting write access input */     pipe = popen("mplayer -slave 'your_audio_file_here.mp3'", "w");      /* play around little */     (i = 0; < 6; i++)     {         sleep(1);         fputs("pause\n", pipe);         fflush(pipe);     }      /* let mplayer finish, close pipe */     pclose(pipe);     return 0; }

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