handle the paused case

src/zm_ffmpeg_input.cpp

@@ -221,6 +221,9 @@ AVFrame *FFmpeg_Input::get_frame(int stream_id, double at) {
     // Have to grab a frame to update our current frame to know where we are
     get_frame(stream_id);
     zm_dump_frame(frame, "frame->pts > seek_target, got");
+  } else if ( last_seek_request == seek_target ) {
+    // paused case, sending keepalives
+    return frame;
   } // end if frame->pts > seek_target
 
 	last_seek_request = seek_target;