Commit 376bdfb921 for ffmpeg

commit 376bdfb9218590637b0b7990c45a92244e837661
Author: Michael Niedermayer <michael@niedermayer.cc>
Date:   Tue Oct 6 00:13:39 2026 +0200

    avfilter/vf_overlay: support inputs whose size changes

    Found during triage of the security report RqgTntCAW2qN.

diff --git a/libavfilter/vf_overlay.c b/libavfilter/vf_overlay.c
index 43f6e736c3..d1af3bdd99 100644
--- a/libavfilter/vf_overlay.c
+++ b/libavfilter/vf_overlay.c
@@ -977,4 +977,5 @@ const FFFilter ff_vf_overlay = {
     FILTER_INPUTS(avfilter_vf_overlay_inputs),
     FILTER_OUTPUTS(avfilter_vf_overlay_outputs),
     FILTER_QUERY_FUNC2(query_formats),
+    .flags_internal = FF_FILTER_FLAG_DYNAMIC_FRAME_SIZE,
 };