diff -up thunderbird-128.0/media/ffvpx/libavcodec/av1dec.c.build-ffvpx thunderbird-128.0/media/ffvpx/libavcodec/av1dec.c
--- thunderbird-128.0/media/ffvpx/libavcodec/av1dec.c.build-ffvpx	2024-06-24 22:43:40.000000000 +0200
+++ thunderbird-128.0/media/ffvpx/libavcodec/av1dec.c	2024-07-10 11:20:23.200948767 +0200
@@ -887,7 +887,7 @@ static av_cold int av1_decode_init(AVCod
         ff_cbs_fragment_reset(&s->current_obu);
     }
 
-    s->dovi.logctx = avctx;
+    s->dovi.logctx = (AVContext *) avctx;
     s->dovi.dv_profile = 10; // default for AV1
     sd = ff_get_coded_side_data(avctx, AV_PKT_DATA_DOVI_CONF);
     if (sd && sd->size > 0)
diff -up thunderbird-128.0/media/ffvpx/libavcodec/libdav1d.c.build-ffvpx thunderbird-128.0/media/ffvpx/libavcodec/libdav1d.c
--- thunderbird-128.0/media/ffvpx/libavcodec/libdav1d.c.build-ffvpx	2024-07-10 12:46:57.005539959 +0200
+++ thunderbird-128.0/media/ffvpx/libavcodec/libdav1d.c	2024-07-10 12:47:19.067507705 +0200
@@ -289,7 +289,7 @@ static av_cold int libdav1d_init(AVCodec
     c->delay = res > 1 ? res : 0;
 #endif
 
-    dav1d->dovi.logctx = c;
+    dav1d->dovi.logctx = (AVContext *) c;
     dav1d->dovi.dv_profile = 10; // default for AV1
     sd = ff_get_coded_side_data(c, AV_PKT_DATA_DOVI_CONF);
     if (sd && sd->size > 0)