Commit 66550809 for libheif

commit 665508096f1692ceb937e8faffa3954fa94682f0
Author: Dirk Farin <dirk.farin@gmail.com>
Date:   Tue Feb 24 20:57:53 2026 +0100

    heif-enc: show error when no input files are found when encoding sequences

diff --git a/examples/heif_enc.cc b/examples/heif_enc.cc
index 16ff8d6b..475a6914 100644
--- a/examples/heif_enc.cc
+++ b/examples/heif_enc.cc
@@ -2608,6 +2608,11 @@ int do_encode_sequence(heif_context* context, heif_encoder* encoder, heif_encodi
     heif_nclx_color_profile_free(nclx);
   }

+  if (!track) {
+    std::cerr << "No input files could be encoded into sequence track\n";
+    return 5;
+  }
+
   std::cout << "\n";

   heif_error error = heif_track_encode_end_of_sequence(track, encoder);