Fix payloaders MTU to 1200

thiblahute · MathieuDuponchelle · commit c4f771dbbce5 · 2022-10-03T13:15:20.000+02:00
Higher value might be too big (in particular with many VPNs `webrtcsink`
won't work with the default 1400 MTU).

1200 is the default value in libwebrtc and it is references in several
places there.
diff --git a/plugins/src/webrtcsink/imp.rs b/plugins/src/webrtcsink/imp.rs
@@ -468,6 +468,7 @@ fn setup_encoding(
         .with_context(|| format!("Creating payloader {}", codec.payloader.name()))?;
     let parse_filter = make_element("capsfilter", None)?;
 
+    pay.set_property("mtu", 1200 as u32);
     pay.set_property("pt", codec.payload as u32);
 
     if let Some(ssrc) = ssrc {
