https://bugs.gentoo.org/973595
https://github.com/strukturag/libheif/commit/9c9d839132f8846652ecadceaa8dcf23d1ff3e4c

From 9c9d839132f8846652ecadceaa8dcf23d1ff3e4c Mon Sep 17 00:00:00 2001
From: Joachim Bauch <bauch@struktur.de>
Date: Wed, 8 Apr 2026 10:23:34 +0200
Subject: [PATCH] Add patch to fix building against SVT-AV1 4.1.0

--- a/libheif/plugins/encoder_svt.cc
+++ b/libheif/plugins/encoder_svt.cc
@@ -838,7 +838,19 @@ static heif_error svt_start_sequence_encoding_intern(void* encoder_raw, const he
     // svt_config.force_key_frames = true; TODO: this does not seem to work (see all [1])
 
 #if 1
-#if SVT_AV1_CHECK_VERSION(4, 0, 0)
+#if SVT_AV1_CHECK_VERSION(4, 1, 0)
+    switch (options->gop_structure) {
+      case heif_sequence_gop_structure_intra_only:
+        //svt_config.pred_structure = 1; // LOW_DELAY
+        break;
+      case heif_sequence_gop_structure_lowdelay:
+        //svt_config.pred_structure = 1; // LOW_DELAY
+        break;
+      case heif_sequence_gop_structure_unrestricted:
+        svt_config.pred_structure = PredStructure::RANDOM_ACCESS;
+        break;
+    }
+#elif SVT_AV1_CHECK_VERSION(4, 0, 0)
     switch (options->gop_structure) {
       case heif_sequence_gop_structure_intra_only:
         //svt_config.pred_structure = 1; // LOW_DELAY