The "unsupported" container it is testing for seems to works with
ffmpeg-9 which causes the test to (successfully) fail.

Would rather not skip the entire subset of tests (important for testing
ffmpeg), so insert a QSKIP only on this specific bit for now.
--- a/tests/auto/integration/qmediaplayerformatsupport/tst_qmediaplayerformatsupport.cpp
+++ b/tests/auto/integration/qmediaplayerformatsupport/tst_qmediaplayerformatsupport.cpp
@@ -111,4 +111,5 @@
     void play_fails_withUnsupportedContainer()
     {
+        QSKIP("Skipped on Gentoo");
         QFETCH(const QUrl, url);