diff --git a/player/command.c b/player/command.c
index 65469988d90be..70c4b51825760 100644
--- a/player/command.c
+++ b/player/command.c
@@ -56,6 +56,7 @@
 #include "options/m_config_frontend.h"
 #include "options/parse_configfile.h"
 #include "osdep/getpid.h"
+#include "video/decode/vd_lavc.h"
 #include "video/out/gpu/context.h"
 #include "video/out/vo.h"
 #include "video/csputils.h"
@@ -7388,6 +7389,16 @@ void mp_option_change_callback(void *ctx, struct m_config_option *co, int flags,
         mpctx->ipc_ctx = mp_init_ipc(mpctx->clients, mpctx->global);
     }
 
+    if (opt_ptr == &opts->vd_lavc_params->threads) {
+        struct track *track = mpctx->current_track[0][STREAM_VIDEO];
+        uninit_video_chain(mpctx);
+        reinit_video_chain(mpctx);
+        if (track)
+            queue_seek(mpctx, MPSEEK_RELATIVE, 0.0, MPSEEK_EXACT, 0);
+
+        mp_wakeup_core(mpctx);
+    }
+
     if (opt_ptr == &opts->vo->video_driver_list ||
         opt_ptr == &opts->ra_ctx_opts->context_list ||
         opt_ptr == &opts->ra_ctx_opts->context_type) {
diff --git a/video/decode/vd_lavc.c b/video/decode/vd_lavc.c
index 05b66edbd8ed5..3f1d2f19b97da 100644
--- a/video/decode/vd_lavc.c
+++ b/video/decode/vd_lavc.c
@@ -56,6 +56,8 @@
 
 #include "options/m_option.h"
 
+#include "vd_lavc.h"
+
 static void init_avctx(struct mp_filter *vd);
 static void uninit_avctx(struct mp_filter *vd);
 
@@ -69,28 +71,6 @@ static int hwdec_opt_help(struct mp_log *log, const m_option_t *opt,
 
 #define OPT_BASE_STRUCT struct vd_lavc_params
 
-struct vd_lavc_params {
-    bool fast;
-    int film_grain;
-    bool show_all;
-    int skip_loop_filter;
-    int skip_idct;
-    int skip_frame;
-    int framedrop;
-    int threads;
-    bool bitexact;
-    bool old_x264;
-    bool apply_cropping;
-    bool check_hw_profile;
-    int software_fallback;
-    char **avopts;
-    int dr;
-    char **hwdec_api;
-    char *hwdec_codecs;
-    int hwdec_image_format;
-    int hwdec_extra_frames;
-};
-
 static const struct m_opt_choice_alternatives discard_names[] = {
     {"none",        AVDISCARD_NONE},
     {"default",     AVDISCARD_DEFAULT},
diff --git a/video/decode/vd_lavc.h b/video/decode/vd_lavc.h
new file mode 100644
index 0000000000000..cdd39a614da78
--- /dev/null
+++ b/video/decode/vd_lavc.h
@@ -0,0 +1,28 @@
+#ifndef MPLAYER_VD_LAVC
+#define MPLAYER_VD_LAVC
+
+#include <stdbool.h>
+
+struct vd_lavc_params {
+    bool fast;
+    int film_grain;
+    bool show_all;
+    int skip_loop_filter;
+    int skip_idct;
+    int skip_frame;
+    int framedrop;
+    int threads;
+    bool bitexact;
+    bool old_x264;
+    bool apply_cropping;
+    bool check_hw_profile;
+    int software_fallback;
+    char **avopts;
+    int dr;
+    char **hwdec_api;
+    char *hwdec_codecs;
+    int hwdec_image_format;
+    int hwdec_extra_frames;
+};
+
+#endif