Commit bfc6c4a7f4 for aom

commit bfc6c4a7f4be37b5477f83e6653b7c5c157ba835
Author: Marco Paniconi <marpan@google.com>
Date:   Thu Jan 22 10:43:52 2026 -0800

    rtc: Re-enable speed feature for speed 6.

    Re-enable the speed feature used in rd_use_partition(),
    for variance_partitioning realtime mode, that was disabled
    as speculative fix to the issue below. The failure/crash
    is still happening so this speed feature is not the issue.

    The speed feature was disabled here:
    https://aomedia-review.googlesource.com/c/aom/+/205381

    Bug: b:457951958
    Change-Id: Idb9f7bb78460c6d1bae54cdb3600543845bae2a2

diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index ef450213de..e4c5e94c2d 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -2831,8 +2831,11 @@ void av1_set_speed_features_qindex_dependent(AV1_COMP *cpi, int speed) {

   if (cpi->oxcf.mode == REALTIME) {
     if (speed >= 6) {
-      // Disable this as speculative fix to issue: 457951958.
-      sf->part_sf.adjust_var_based_rd_partitioning = 0;
+      const int qindex_thresh = boosted ? 190 : (is_720p_or_larger ? 120 : 150);
+      sf->part_sf.adjust_var_based_rd_partitioning =
+          frame_is_intra_only(cm)
+              ? 0
+              : cm->quant_params.base_qindex > qindex_thresh;
     }
     return;
   }