diff --git a/libavcodec/v308dec.c b/libavcodec/v308dec.c
index b6f197da51..75d65e8352 100644
--- a/libavcodec/v308dec.c
+++ b/libavcodec/v308dec.c
@@ -72,19 +72,12 @@ static int v308_decode_frame(AVCodecContext *avctx, void *data,
     return avpkt->size;
 }
 
-static av_cold int v308_decode_close(AVCodecContext *avctx)
-{
-
-    return 0;
-}
-
 AVCodec ff_v308_decoder = {
     .name         = "v308",
     .type         = AVMEDIA_TYPE_VIDEO,
     .id           = AV_CODEC_ID_V308,
     .init         = v308_decode_init,
     .decode       = v308_decode_frame,
-    .close        = v308_decode_close,
     .capabilities = CODEC_CAP_DR1,
     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"),
 };
diff --git a/libavcodec/v408dec.c b/libavcodec/v408dec.c
index 31c14dc3e1..751650d35e 100644
--- a/libavcodec/v408dec.c
+++ b/libavcodec/v408dec.c
@@ -79,12 +79,6 @@ static int v408_decode_frame(AVCodecContext *avctx, void *data,
     return avpkt->size;
 }
 
-static av_cold int v408_decode_close(AVCodecContext *avctx)
-{
-
-    return 0;
-}
-
 #if CONFIG_AYUV_DECODER
 AVCodec ff_ayuv_decoder = {
     .name         = "ayuv",
@@ -92,7 +86,6 @@ AVCodec ff_ayuv_decoder = {
     .id           = AV_CODEC_ID_AYUV,
     .init         = v408_decode_init,
     .decode       = v408_decode_frame,
-    .close        = v408_decode_close,
     .capabilities = CODEC_CAP_DR1,
     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed MS 4:4:4:4"),
 };
@@ -104,7 +97,6 @@ AVCodec ff_v408_decoder = {
     .id           = AV_CODEC_ID_V408,
     .init         = v408_decode_init,
     .decode       = v408_decode_frame,
-    .close        = v408_decode_close,
     .capabilities = CODEC_CAP_DR1,
     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed QT 4:4:4:4"),
 };
diff --git a/libavcodec/xbmdec.c b/libavcodec/xbmdec.c
index 51f88a238b..24fe550dda 100644
--- a/libavcodec/xbmdec.c
+++ b/libavcodec/xbmdec.c
@@ -27,6 +27,7 @@
 
 static av_cold int xbm_decode_init(AVCodecContext *avctx)
 {
+    avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
 
     return 0;
 }
@@ -73,8 +74,6 @@ static int xbm_decode_frame(AVCodecContext *avctx, void *data,
         ptr += strcspn(ptr, "\n\r") + 1;
     }
 
-    avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
-
     if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
         return ret;
 
@@ -109,18 +108,11 @@ static int xbm_decode_frame(AVCodecContext *avctx, void *data,
     return avpkt->size;
 }
 
-static av_cold int xbm_decode_close(AVCodecContext *avctx)
-{
-
-    return 0;
-}
-
 AVCodec ff_xbm_decoder = {
     .name         = "xbm",
     .type         = AVMEDIA_TYPE_VIDEO,
     .id           = AV_CODEC_ID_XBM,
     .init         = xbm_decode_init,
-    .close        = xbm_decode_close,
     .decode       = xbm_decode_frame,
     .capabilities = CODEC_CAP_DR1,
     .long_name    = NULL_IF_CONFIG_SMALL("XBM (X BitMap) image"),
diff --git a/libavcodec/y41pdec.c b/libavcodec/y41pdec.c
index 42449c63c4..70b68aa612 100644
--- a/libavcodec/y41pdec.c
+++ b/libavcodec/y41pdec.c
@@ -81,19 +81,12 @@ static int y41p_decode_frame(AVCodecContext *avctx, void *data,
     return avpkt->size;
 }
 
-static av_cold int y41p_decode_close(AVCodecContext *avctx)
-{
-
-    return 0;
-}
-
 AVCodec ff_y41p_decoder = {
     .name         = "y41p",
     .type         = AVMEDIA_TYPE_VIDEO,
     .id           = AV_CODEC_ID_Y41P,
     .init         = y41p_decode_init,
     .decode       = y41p_decode_frame,
-    .close        = y41p_decode_close,
     .capabilities = CODEC_CAP_DR1,
     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
 };
diff --git a/libavcodec/yuv4dec.c b/libavcodec/yuv4dec.c
index 6965f3924f..1d1fdd09c5 100644
--- a/libavcodec/yuv4dec.c
+++ b/libavcodec/yuv4dec.c
@@ -73,19 +73,12 @@ static int yuv4_decode_frame(AVCodecContext *avctx, void *data,
     return avpkt->size;
 }
 
-static av_cold int yuv4_decode_close(AVCodecContext *avctx)
-{
-
-    return 0;
-}
-
 AVCodec ff_yuv4_decoder = {
     .name         = "yuv4",
     .type         = AVMEDIA_TYPE_VIDEO,
     .id           = AV_CODEC_ID_YUV4,
     .init         = yuv4_decode_init,
     .decode       = yuv4_decode_frame,
-    .close        = yuv4_decode_close,
     .capabilities = CODEC_CAP_DR1,
     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
 };