setValueAtKey and addKey on Pictures

Hello everybody,

Can you say me if Premiere SDK supports addKey on pictures ?

When I attempt to add addKey (on opacity) on movies, it works, but if I try on pictures (.jpg, .png...), it doesn't work : I used this script (https://forums.adobe.com/thread/2471227)

I don't understand, anyone can help me ? 2 weeks that I'm looking for, I'm going crazy. Thank you.

    var proj = app.project; 

    var seq = proj.activeSequence; 

    var time = seq.getPlayerPosition(); // CTI = Current Time Indicator. 

    var time2 = seq.getPlayerPosition(); 

    var time3 = seq.getPlayerPosition(); 

    time2.seconds += 1; 

    time3.seconds += 2; 

    var videoTracks = seq.videoTracks; 

    var track = videoTracks[0]; 

        for (var j = 0; j < track.clips.numItems; j++) { 

            var clip = track.clips; 

                for (var k = 0; k < clip.components.numItems; k++) { 

                    var component = clip.components; 

                        // Trajectory 

                        for (var l = 0; l < component.properties.numItems; l++) { 

                            var property = component.properties; 

                            if (property.displayName == "Scale") { 

                                // Scale 

                                if (!property.isTimeVarying()) { 

                                    property.setTimeVarying(true); 

                                } 

                                property.addKey(time); 

                                property.addKey(time2); 

                                property.addKey(time3); 

                                var k = property.getKeys(); 

                                if (property.areKeyframesSupported() == true) { 

                                    var result = property.getValueAtKey(time); 

                                    property.setValueAtKey(time, 100, true); 

                                    property.setValueAtKey(time2, 200, true); 

                                    property.setValueAtKey(time3, 300, true); 

                                } 

                        } 

                    } 

               } 

        }