--- /dev/null
+From 6f9e72c585265d8def8a613b36cd4f524c201980 Mon Sep 17 00:00:00 2001
+From: Andrey Volk <andywolk@gmail.com>
+Date: Wed, 4 Oct 2023 00:47:39 +0300
+Subject: [PATCH] [libvpx] VP8: disallow thread count changes
+
+---
+ libs/libvpx/vp8/encoder/onyx_if.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+--- a/libs/libvpx/vp8/encoder/onyx_if.c
++++ b/libs/libvpx/vp8/encoder/onyx_if.c
+@@ -1447,6 +1447,11 @@ void vp8_change_config(VP8_COMP *cpi, VP
+ last_h = cpi->oxcf.Height;
+ prev_number_of_layers = cpi->oxcf.number_of_layers;
+
++ if (cpi->initial_width) {
++ // TODO(https://crbug.com/1486441): Allow changing thread counts; the
++ // allocation is done once in vp8_create_compressor().
++ oxcf->multi_threaded = cpi->oxcf.multi_threaded;
++ }
+ cpi->oxcf = *oxcf;
+
+ switch (cpi->oxcf.Mode) {
--- /dev/null
+From 2ab7a3d323984a4df969ea19dadf86213308a361 Mon Sep 17 00:00:00 2001
+From: Andrey Volk <andywolk@gmail.com>
+Date: Fri, 6 Oct 2023 00:42:10 +0300
+Subject: [PATCH] [libvpx] Fix bug with smaller width bigger size
+
+---
+ libs/libvpx/vp9/common/vp9_alloccommon.c | 12 +++++------
+ libs/libvpx/vp9/encoder/vp9_encoder.c | 27 ++++++++++++++++++++++--
+ 2 files changed, 31 insertions(+), 8 deletions(-)
+
+--- a/libs/libvpx/vp9/common/vp9_alloccommon.c
++++ b/libs/libvpx/vp9/common/vp9_alloccommon.c
+@@ -123,12 +123,6 @@ int vp9_alloc_context_buffers(VP9_COMMON
+ if (cm->alloc_mi(cm, new_mi_size)) goto fail;
+ }
+
+- if (cm->seg_map_alloc_size < cm->mi_rows * cm->mi_cols) {
+- // Create the segmentation map structure and set to 0.
+- free_seg_map(cm);
+- if (alloc_seg_map(cm, cm->mi_rows * cm->mi_cols)) goto fail;
+- }
+-
+ if (cm->above_context_alloc_cols < cm->mi_cols) {
+ vpx_free(cm->above_context);
+ cm->above_context = (ENTROPY_CONTEXT *)vpx_calloc(
+@@ -143,6 +137,12 @@ int vp9_alloc_context_buffers(VP9_COMMON
+ cm->above_context_alloc_cols = cm->mi_cols;
+ }
+
++ if (cm->seg_map_alloc_size < cm->mi_rows * cm->mi_cols) {
++ // Create the segmentation map structure and set to 0.
++ free_seg_map(cm);
++ if (alloc_seg_map(cm, cm->mi_rows * cm->mi_cols)) goto fail;
++ }
++
+ if (vp9_alloc_loop_filter(cm)) goto fail;
+
+ return 0;
+--- a/libs/libvpx/vp9/encoder/vp9_encoder.c
++++ b/libs/libvpx/vp9/encoder/vp9_encoder.c
+@@ -1915,6 +1915,17 @@ static void alloc_copy_partition_data(VP
+ }
+ }
+
++static void free_copy_partition_data(VP9_COMP *cpi) {
++ vpx_free(cpi->prev_partition);
++ cpi->prev_partition = NULL;
++ vpx_free(cpi->prev_segment_id);
++ cpi->prev_segment_id = NULL;
++ vpx_free(cpi->prev_variance_low);
++ cpi->prev_variance_low = NULL;
++ vpx_free(cpi->copied_frame_cnt);
++ cpi->copied_frame_cnt = NULL;
++}
++
+ void vp9_change_config(struct VP9_COMP *cpi, const VP9EncoderConfig *oxcf) {
+ VP9_COMMON *const cm = &cpi->common;
+ RATE_CONTROL *const rc = &cpi->rc;
+@@ -1999,6 +2010,8 @@ void vp9_change_config(struct VP9_COMP *
+ new_mi_size = cm->mi_stride * calc_mi_size(cm->mi_rows);
+ if (cm->mi_alloc_size < new_mi_size) {
+ vp9_free_context_buffers(cm);
++ vp9_free_pc_tree(&cpi->td);
++ vpx_free(cpi->mbmi_ext_base);
+ alloc_compressor_data(cpi);
+ realloc_segmentation_maps(cpi);
+ cpi->initial_width = cpi->initial_height = 0;
+@@ -2014,8 +2027,18 @@ void vp9_change_config(struct VP9_COMP *
+ update_frame_size(cpi);
+
+ if (last_w != cpi->oxcf.width || last_h != cpi->oxcf.height) {
+- memset(cpi->consec_zero_mv, 0,
+- cm->mi_rows * cm->mi_cols * sizeof(*cpi->consec_zero_mv));
++ vpx_free(cpi->consec_zero_mv);
++ CHECK_MEM_ERROR(
++ cm, cpi->consec_zero_mv,
++ vpx_calloc(cm->mi_rows * cm->mi_cols, sizeof(*cpi->consec_zero_mv)));
++
++ vpx_free(cpi->skin_map);
++ CHECK_MEM_ERROR(
++ cm, cpi->skin_map,
++ vpx_calloc(cm->mi_rows * cm->mi_cols, sizeof(cpi->skin_map[0])));
++
++ free_copy_partition_data(cpi);
++ alloc_copy_partition_data(cpi);
+ if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ)
+ vp9_cyclic_refresh_reset_resize(cpi);
+ rc->rc_1_frame = 0;