+ if (getProperty("crop") == "1") {
+ // we want a center crop filter effect
+ Mlt::Service clipService(m_baseTrackProducers.at(0)->get_service());
+ int ct = 0;
+ Mlt::Filter *filter = clipService.filter(ct);
+ while (filter) {
+ if (strcmp(filter->get("mlt_service"), "crop") == 0) {
+ break;
+ }
+ ct++;
+ filter = clipService.filter(ct);
+ }
+
+ if (!filter || strcmp(filter->get("mlt_service"), "crop")) {
+ // filter does not exist, create it...
+ Mlt::Filter *filter = new Mlt::Filter(*(m_baseTrackProducers.at(0)->profile()), "crop");
+ filter->set("center", 1);
+ clipService.attach(*filter);
+ }
+ } else {
+ Mlt::Service clipService(m_baseTrackProducers.at(0)->get_service());
+ int ct = 0;
+ Mlt::Filter *filter = clipService.filter(0);
+ while (filter) {
+ if (strcmp(filter->get("mlt_service"), "crop") == 0) {
+ clipService.detach(*filter);
+ } else ct++;
+ filter = clipService.filter(ct);
+ }
+ }