diff --git a/libavcodec/8bps.c b/libavcodec/8bps.c
index 53e939d35d..9d19e21342 100644
--- a/libavcodec/8bps.c
+++ b/libavcodec/8bps.c
@@ -122,16 +122,7 @@ static int decode_frame(AVCodecContext *avctx, void *data,
     }
 
     if (avctx->bits_per_coded_sample <= 8) {
-        buffer_size_t size;
-        const uint8_t *pal = av_packet_get_side_data(avpkt,
-                                                     AV_PKT_DATA_PALETTE,
-                                                     &size);
-        if (pal && size == AVPALETTE_SIZE) {
-            frame->palette_has_changed = 1;
-            memcpy(c->pal, pal, AVPALETTE_SIZE);
-        } else if (pal) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
-        }
+        frame->palette_has_changed = ff_copy_palette(c->pal, avpkt, avctx);
 
         memcpy (frame->data[1], c->pal, AVPALETTE_SIZE);
     }
diff --git a/libavcodec/cinepak.c b/libavcodec/cinepak.c
index d70cb4b694..61e2991d04 100644
--- a/libavcodec/cinepak.c
+++ b/libavcodec/cinepak.c
@@ -477,14 +477,7 @@ static int cinepak_decode_frame(AVCodecContext *avctx,
         return ret;
 
     if (s->palette_video) {
-        buffer_size_t size;
-        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
-        if (pal && size == AVPALETTE_SIZE) {
-            s->frame->palette_has_changed = 1;
-            memcpy(s->pal, pal, AVPALETTE_SIZE);
-        } else if (pal) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
-        }
+        s->frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
     }
 
     if ((ret = cinepak_decode(s)) < 0) {
diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index 5a00aeedae..efa8a9ac8d 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -2051,3 +2051,17 @@ FF_ENABLE_DEPRECATION_WARNINGS
 
     return 0;
 }
+
+int ff_copy_palette(void *dst, const AVPacket *src, void *logctx)
+{
+    buffer_size_t size;
+    const void *pal = av_packet_get_side_data(src, AV_PKT_DATA_PALETTE, &size);
+
+    if (pal && size == AVPALETTE_SIZE) {
+        memcpy(dst, pal, AVPALETTE_SIZE);
+        return 1;
+    } else if (pal) {
+        av_log(logctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
+    }
+    return 0;
+}
diff --git a/libavcodec/gdv.c b/libavcodec/gdv.c
index 860634c9ec..cda284a32a 100644
--- a/libavcodec/gdv.c
+++ b/libavcodec/gdv.c
@@ -462,8 +462,6 @@ static int gdv_decode_frame(AVCodecContext *avctx, void *data,
     PutByteContext *pb = &gdv->pb;
     AVFrame *frame = data;
     int ret, i;
-    buffer_size_t pal_size;
-    const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &pal_size);
     int compression;
     unsigned flags;
     uint8_t *dst;
@@ -479,8 +477,7 @@ static int gdv_decode_frame(AVCodecContext *avctx, void *data,
 
     if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
         return ret;
-    if (pal && pal_size == AVPALETTE_SIZE)
-        memcpy(gdv->pal, pal, AVPALETTE_SIZE);
+    ff_copy_palette(gdv->pal, avpkt, avctx);
 
     if (compression < 2 && bytestream2_get_bytes_left(gb) < 256*3)
         return AVERROR_INVALIDDATA;
diff --git a/libavcodec/idcinvideo.c b/libavcodec/idcinvideo.c
index 569191511f..02d5957bc7 100644
--- a/libavcodec/idcinvideo.c
+++ b/libavcodec/idcinvideo.c
@@ -214,8 +214,6 @@ static int idcin_decode_frame(AVCodecContext *avctx,
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     IdcinContext *s = avctx->priv_data;
-    buffer_size_t pal_size;
-    const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &pal_size);
     AVFrame *frame = data;
     int ret;
 
@@ -228,12 +226,7 @@ static int idcin_decode_frame(AVCodecContext *avctx,
     if (idcin_decode_vlcs(s, frame))
         return AVERROR_INVALIDDATA;
 
-    if (pal && pal_size == AVPALETTE_SIZE) {
-        frame->palette_has_changed = 1;
-        memcpy(s->pal, pal, AVPALETTE_SIZE);
-    } else if (pal) {
-        av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size);
-    }
+    frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
     /* make the palette available on the way out */
     memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
 
diff --git a/libavcodec/imx.c b/libavcodec/imx.c
index 0d6c99e5bf..59edd427cd 100644
--- a/libavcodec/imx.c
+++ b/libavcodec/imx.c
@@ -50,16 +50,13 @@ static int imx_decode_frame(AVCodecContext *avctx, void *data,
 {
     SimbiosisIMXContext *imx = avctx->priv_data;
     int ret, x, y;
-    buffer_size_t pal_size;
-    const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &pal_size);
     AVFrame *frame = imx->frame;
     GetByteContext gb;
 
     if ((ret = ff_reget_buffer(avctx, frame, 0)) < 0)
         return ret;
 
-    if (pal && pal_size == AVPALETTE_SIZE) {
-        memcpy(imx->pal, pal, pal_size);
+    if (ff_copy_palette(imx->pal, avpkt, avctx)) {
         frame->palette_has_changed = 1;
         frame->key_frame = 1;
     } else {
diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index b57b996816..0fb3107979 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -393,6 +393,15 @@ int ff_int_from_list_or_default(void *ctx, const char * val_name, int val,
 
 void ff_dvdsub_parse_palette(uint32_t *palette, const char *p);
 
+/**
+ * Check whether the side-data of src contains a palette of
+ * size AVPALETTE_SIZE; if so, copy it to dst and return 1;
+ * else return 0.
+ * Also emit an error message upon encountering a palette
+ * with invalid size.
+ */
+int ff_copy_palette(void *dst, const AVPacket *src, void *logctx);
+
 #if defined(_WIN32) && CONFIG_SHARED && !defined(BUILDING_avcodec)
 #    define av_export_avcodec __declspec(dllimport)
 #else
diff --git a/libavcodec/interplayvideo.c b/libavcodec/interplayvideo.c
index 4d16fdf619..b1e0145e30 100644
--- a/libavcodec/interplayvideo.c
+++ b/libavcodec/interplayvideo.c
@@ -1317,14 +1317,7 @@ static int ipvideo_decode_frame(AVCodecContext *avctx,
         return ret;
 
     if (!s->is_16bpp) {
-        buffer_size_t size;
-        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
-        if (pal && size == AVPALETTE_SIZE) {
-            frame->palette_has_changed = 1;
-            memcpy(s->pal, pal, AVPALETTE_SIZE);
-        } else if (pal) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
-        }
+        frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
     }
 
     switch (frame_format) {
diff --git a/libavcodec/kmvc.c b/libavcodec/kmvc.c
index 0d96139220..02caae346c 100644
--- a/libavcodec/kmvc.c
+++ b/libavcodec/kmvc.c
@@ -268,8 +268,6 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *got_frame,
     int i, ret;
     int header;
     int blocksize;
-    buffer_size_t pal_size;
-    const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &pal_size);
 
     bytestream2_init(&ctx->g, avpkt->data, avpkt->size);
 
@@ -304,12 +302,8 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *got_frame,
         }
     }
 
-    if (pal && pal_size == AVPALETTE_SIZE) {
+    if (ff_copy_palette(ctx->pal, avpkt, avctx))
         frame->palette_has_changed = 1;
-        memcpy(ctx->pal, pal, AVPALETTE_SIZE);
-    } else if (pal) {
-        av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size);
-    }
 
     if (ctx->setpal) {
         ctx->setpal = 0;
diff --git a/libavcodec/msrle.c b/libavcodec/msrle.c
index feea2b60bb..7bfb29e58e 100644
--- a/libavcodec/msrle.c
+++ b/libavcodec/msrle.c
@@ -97,15 +97,8 @@ static int msrle_decode_frame(AVCodecContext *avctx,
         return ret;
 
     if (avctx->bits_per_coded_sample > 1 && avctx->bits_per_coded_sample <= 8) {
-        buffer_size_t size;
-        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
-
-        if (pal && size == AVPALETTE_SIZE) {
-            s->frame->palette_has_changed = 1;
-            memcpy(s->pal, pal, AVPALETTE_SIZE);
-        } else if (pal) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
-        }
+        s->frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
+
         /* make the palette available */
         memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);
     }
diff --git a/libavcodec/msvideo1.c b/libavcodec/msvideo1.c
index b4b5ea4666..782e5cae00 100644
--- a/libavcodec/msvideo1.c
+++ b/libavcodec/msvideo1.c
@@ -314,15 +314,7 @@ static int msvideo1_decode_frame(AVCodecContext *avctx,
         return ret;
 
     if (s->mode_8bit) {
-        buffer_size_t size;
-        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
-
-        if (pal && size == AVPALETTE_SIZE) {
-            memcpy(s->pal, pal, AVPALETTE_SIZE);
-            s->frame->palette_has_changed = 1;
-        } else if (pal) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
-        }
+        s->frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
     }
 
     if (s->mode_8bit)
diff --git a/libavcodec/qpeg.c b/libavcodec/qpeg.c
index f4edc4b16f..ca8a0b01d6 100644
--- a/libavcodec/qpeg.c
+++ b/libavcodec/qpeg.c
@@ -274,8 +274,6 @@ static int decode_frame(AVCodecContext *avctx,
     AVFrame * const ref = a->ref;
     uint8_t* outdata;
     int delta, intra, ret;
-    buffer_size_t pal_size;
-    const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &pal_size);
 
     if (avpkt->size < 0x86) {
         av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
@@ -300,12 +298,7 @@ static int decode_frame(AVCodecContext *avctx,
     }
 
     /* make the palette available on the way out */
-    if (pal && pal_size == AVPALETTE_SIZE) {
-        p->palette_has_changed = 1;
-        memcpy(a->pal, pal, AVPALETTE_SIZE);
-    } else if (pal) {
-        av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size);
-    }
+    p->palette_has_changed = ff_copy_palette(a->pal, avpkt, avctx);
     memcpy(p->data[1], a->pal, AVPALETTE_SIZE);
 
     av_frame_unref(ref);
diff --git a/libavcodec/qtrle.c b/libavcodec/qtrle.c
index e04fd31431..33da393bd1 100644
--- a/libavcodec/qtrle.c
+++ b/libavcodec/qtrle.c
@@ -540,15 +540,7 @@ static int qtrle_decode_frame(AVCodecContext *avctx,
     }
 
     if(has_palette) {
-        buffer_size_t size;
-        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
-
-        if (pal && size == AVPALETTE_SIZE) {
-            s->frame->palette_has_changed = 1;
-            memcpy(s->pal, pal, AVPALETTE_SIZE);
-        } else if (pal) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
-        }
+        s->frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
 
         /* make the palette available on the way out */
         memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);
diff --git a/libavcodec/rawdec.c b/libavcodec/rawdec.c
index c18c3dd3e1..1badb69180 100644
--- a/libavcodec/rawdec.c
+++ b/libavcodec/rawdec.c
@@ -367,16 +367,8 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
     }
 
     if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
-        buffer_size_t pal_size;
-        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
-                                                     &pal_size);
         int ret;
 
-        if (pal && pal_size != AVPALETTE_SIZE) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size);
-            pal = NULL;
-        }
-
         if (!context->palette)
             context->palette = av_buffer_alloc(AVPALETTE_SIZE);
         if (!context->palette) {
@@ -389,15 +381,14 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
             return ret;
         }
 
-        if (pal) {
-            memcpy(context->palette->data, pal, AVPALETTE_SIZE);
+        if (ff_copy_palette(context->palette->data, avpkt, avctx)) {
             frame->palette_has_changed = 1;
         } else if (context->is_nut_pal8) {
             int vid_size = avctx->width * avctx->height;
             int pal_size = avpkt->size - vid_size;
 
             if (avpkt->size > vid_size && pal_size <= AVPALETTE_SIZE) {
-                pal = avpkt->data + vid_size;
+                const uint8_t *pal = avpkt->data + vid_size;
                 memcpy(context->palette->data, pal, pal_size);
                 frame->palette_has_changed = 1;
             }
diff --git a/libavcodec/rscc.c b/libavcodec/rscc.c
index 79b02da441..372c35b603 100644
--- a/libavcodec/rscc.c
+++ b/libavcodec/rscc.c
@@ -346,17 +346,8 @@ static int rscc_decode_frame(AVCodecContext *avctx, void *data,
 
     /* Palette handling */
     if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
-        buffer_size_t size;
-        const uint8_t *palette = av_packet_get_side_data(avpkt,
-                                                         AV_PKT_DATA_PALETTE,
-                                                         &size);
-        if (palette && size == AVPALETTE_SIZE) {
-            frame->palette_has_changed = 1;
-            memcpy(ctx->palette, palette, AVPALETTE_SIZE);
-        } else if (palette) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
-        }
-        memcpy (frame->data[1], ctx->palette, AVPALETTE_SIZE);
+        frame->palette_has_changed = ff_copy_palette(ctx->palette, avpkt, avctx);
+        memcpy(frame->data[1], ctx->palette, AVPALETTE_SIZE);
     }
     // We only return a picture when enough of it is undamaged, this avoids copying nearly broken frames around
     if (ctx->valid_pixels < ctx->inflated_size)
diff --git a/libavcodec/smc.c b/libavcodec/smc.c
index 33581bbf81..73ee6d6ebc 100644
--- a/libavcodec/smc.c
+++ b/libavcodec/smc.c
@@ -435,8 +435,6 @@ static int smc_decode_frame(AVCodecContext *avctx,
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     SmcContext *s = avctx->priv_data;
-    buffer_size_t pal_size;
-    const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &pal_size);
     int ret;
     int total_blocks = ((s->avctx->width + 3) / 4) * ((s->avctx->height + 3) / 4);
 
@@ -448,12 +446,7 @@ static int smc_decode_frame(AVCodecContext *avctx,
     if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
         return ret;
 
-    if (pal && pal_size == AVPALETTE_SIZE) {
-        s->frame->palette_has_changed = 1;
-        memcpy(s->pal, pal, AVPALETTE_SIZE);
-    } else if (pal) {
-        av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size);
-    }
+    s->frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
 
     smc_decode_stream(s);
 
diff --git a/libavcodec/tscc.c b/libavcodec/tscc.c
index d33639f3a4..482c2966a0 100644
--- a/libavcodec/tscc.c
+++ b/libavcodec/tscc.c
@@ -72,15 +72,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     int palette_has_changed = 0;
 
     if (c->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
-        buffer_size_t size;
-        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
-
-        if (pal && size == AVPALETTE_SIZE) {
-            palette_has_changed = 1;
-            memcpy(c->pal, pal, AVPALETTE_SIZE);
-        } else if (pal) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
-        }
+        palette_has_changed = ff_copy_palette(c->pal, avpkt, avctx);
     }
 
     ret = inflateReset(&c->zstream);
