This test is known flaky and causes a timeout every time on ppc64.

Upstream-URL: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/2803

--- gst-plugins-good-1.26.1/tests/check/elements/flvmux.c.old	2025-04-24 14:20:14.000000000 -0500
+++ gst-plugins-good-1.26.1/tests/check/elements/flvmux.c	2025-05-17 17:53:27.568081593 -0500
@@ -1162,7 +1162,7 @@
 
   tcase_add_test (tc_chain, test_speex_streamable);
   tcase_add_test (tc_chain, test_increasing_timestamp_when_pts_none);
-  tcase_add_test (tc_chain, test_video_caps_late);
+  //tcase_add_test (tc_chain, test_video_caps_late);
   tcase_add_test (tc_chain, test_audio_caps_change_streamable);
   tcase_add_test (tc_chain, test_video_caps_change_streamable);
   tcase_add_test (tc_chain, test_audio_caps_change_streamable_single);