fmp4mux: Drop GAP buffers before doing ONVIF UTC time re-timestamping

GAP buffers won't have the reference timestamp meta.

1 files changed, 4 insertions, 4 deletions

diff --git a/generic/fmp4/src/fmp4mux/imp.rs b/generic/fmp4/src/fmp4mux/imp.rs
index ba14f8194..a2d232e19 100644
--- a/generic/fmp4/src/fmp4mux/imp.rs
+++ b/generic/fmp4/src/fmp4mux/imp.rs
@@ -1252,10 +1252,6 @@ impl FMP4Mux {
             fragment_end_pts,
         ) = self.drain_buffers(element, state, settings, timeout, at_eos)?;
 
-        // For ONVIF, replace all timestamps with timestamps based on UTC times.
-        let max_end_utc_time =
-            self.preprocess_drained_streams_onvif(element, state, &mut drained_streams)?;
-
         // Remove all GAP buffers before processing them further
         for (_, _, buffers) in &mut drained_streams {
             buffers.retain(|buf| {
@@ -1265,6 +1261,10 @@ impl FMP4Mux {
             });
         }
 
+        // For ONVIF, replace all timestamps with timestamps based on UTC times.
+        let max_end_utc_time =
+            self.preprocess_drained_streams_onvif(element, state, &mut drained_streams)?;
+
         // Create header now if it was not created before and return the caps
         let mut caps = None;
         if state.stream_header.is_none() {