fix(video): try to optimize memory leaks

gst/src/plugins/app/appsink.rs

@@ -40,6 +40,11 @@ impl AppSink {
         self
     }
 
+    pub fn with_drop(self, drop: bool) -> Self {
+        self.inner.set_property("drop", drop);
+        self
+    }
+
     pub fn with_caps(self, caps: Caps) -> Self {
         self.inner.set_property("caps", caps.inner);
         self

gst/src/plugins/playback/playbin3.rs

@@ -25,6 +25,24 @@ impl Playbin3 {
         self
     }
 
+    pub fn with_buffer_duration(self, duration: impl Into<Option<core::time::Duration>>) -> Self {
+        let duration = match duration.into() {
+            Some(dur) => dur.as_secs() as i64,
+            None => -1,
+        };
+        self.inner.set_property("buffer-duration", duration);
+        self
+    }
+
+    pub fn with_buffer_size(self, size: impl Into<Option<u32>>) -> Self {
+        let size = match size.into() {
+            Some(size) => size as i32,
+            None => -1,
+        };
+        self.inner.set_property("buffer-size", size);
+        self
+    }
+
     pub fn with_video_sink(self, video_sink: &impl ChildOf<Element>) -> Self {
         self.inner
             .set_property("video-sink", &video_sink.upcast_ref().inner);