[chronojump] playpreview and play with run instead of RunAtBackground

[Xavier de Blas <xaviblas src gnome org>]

commit b5bc3bba9fe6e519063e52c918ef92ddb5e5fff4
Author: Xavier de Blas <xaviblas gmail com>
Date:   Wed Jan 9 20:47:34 2019 +0100

    playpreview and play with run instead of RunAtBackground

 src/webcamFfmpeg.cs | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)
---
diff --git a/src/webcamFfmpeg.cs b/src/webcamFfmpeg.cs
index a84f5229..dd8f1113 100644
--- a/src/webcamFfmpeg.cs
+++ b/src/webcamFfmpeg.cs
@@ -69,8 +69,11 @@ public class WebcamFfmpeg : Webcam
 
                List<string> parameters = createParametersPlayPreview();
 
-               process = new Process();
-               bool success = ExecuteProcess.RunAtBackground (ref process, executable, parameters, false, 
false, false);
+               //process = new Process();
+               //bool success = ExecuteProcess.RunAtBackground (ref process, executable, parameters, false, 
false, false);
+               ExecuteProcess.Result r = ExecuteProcess.run (executable, parameters);
+               return new Result(r.success, r.stdout, r.stderr);
+               /*
                if(! success)
                {
                        process = null;
@@ -79,6 +82,7 @@ public class WebcamFfmpeg : Webcam
 
                Running = true;
                return new Result (true, "");
+               */
        }
 
        public override Result PlayFile (string filename)
@@ -88,8 +92,11 @@ public class WebcamFfmpeg : Webcam
 
                List<string> parameters = createParametersPlayFile (filename);
 
-               process = new Process();
-               bool success = ExecuteProcess.RunAtBackground (ref process, executable, parameters, false, 
false, false);
+               //process = new Process();
+               //bool success = ExecuteProcess.RunAtBackground (ref process, executable, parameters, false, 
false, false);
+               ExecuteProcess.Result r = ExecuteProcess.run (executable, parameters);
+               return new Result(r.success, r.stdout, r.stderr);
+               /*
                if(! success)
                {
                        process = null;
@@ -98,6 +105,7 @@ public class WebcamFfmpeg : Webcam
 
                Running = true;
                return new Result (true, "");
+               */
        }
 
        public override bool Snapshot()