fallbacksrc: Try setting imagefreeze to live mode

Otherwise we would start outputting at running time 0, which is going to
be wrong if the pipeline was already running for a while.

Requires https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/653

1 files changed, 13 insertions, 0 deletions

diff --git a/utils/fallbackswitch/src/fallbacksrc.rs b/utils/fallbackswitch/src/fallbacksrc.rs
index 5ae3c2979..7425076da 100644
--- a/utils/fallbackswitch/src/fallbacksrc.rs
+++ b/utils/fallbackswitch/src/fallbacksrc.rs
@@ -635,6 +635,19 @@ impl FallbackSrc {
                         gst::StateChangeError
                     })?;
 
+                if imagefreeze.set_property("is-live", &true).is_err() {
+                    gst_error!(
+                        CAT,
+                        obj: element,
+                        "imagefreeze does not support live mode, this will probably misbehave"
+                    );
+                    gst_element_warning!(
+                        element,
+                        gst::LibraryError::Settings,
+                        ["imagefreeze does not support live mode, this will probably misbehave"]
+                    );
+                }
+
                 let element_weak = element.downgrade();
                 let input_weak = input.downgrade();
                 let videoconvert_weak = videoconvert.downgrade();