// insert required duration for proxy
newProps.insert("proxy_out", item->referencedClip()->producerProperty("out"));
new EditClipCommand(this, item->clipId(), item->referencedClip()->currentProperties(newProps), newProps, true, command);
// insert required duration for proxy
newProps.insert("proxy_out", item->referencedClip()->producerProperty("out"));
new EditClipCommand(this, item->clipId(), item->referencedClip()->currentProperties(newProps), newProps, true, command);