diff --git a/doc/APIchanges b/doc/APIchanges
index bc52a079644..b1181ec60a3 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -14,6 +14,9 @@ libavutil:     2021-04-27
 
 API changes, most recent first:
 
+2023-02-xx - xxxxxxxxxx - lavc 60.0.100 - avcodec.h
+  avcodec_decode_subtitle2() now accepts const AVPacket*.
+
 2023-01-29 - xxxxxxxxxx - lavc 59.59.100 - avcodec.h
   Add AV_CODEC_FLAG_COPY_OPAQUE and AV_CODEC_FLAG_FRAME_DURATION.
 
diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 92fd61f3158..257f319550c 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -2296,8 +2296,8 @@ fail:
     return err < 0 ? err : ret;
 }
 
-static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output,
-                               int *decode_failed)
+static int transcode_subtitles(InputStream *ist, const AVPacket *pkt,
+                               int *got_output, int *decode_failed)
 {
     AVSubtitle subtitle;
     int free_sub = 1;
diff --git a/fftools/ffprobe.c b/fftools/ffprobe.c
index dfa7ff1b241..5beaece094f 100644
--- a/fftools/ffprobe.c
+++ b/fftools/ffprobe.c
@@ -2733,7 +2733,7 @@ static void show_frame(WriterContext *w, AVFrame *frame, AVStream *stream,
 
 static av_always_inline int process_frame(WriterContext *w,
                                           InputFile *ifile,
-                                          AVFrame *frame, AVPacket *pkt,
+                                          AVFrame *frame, const AVPacket *pkt,
                                           int *packet_new)
 {
     AVFormatContext *fmt_ctx = ifile->fmt_ctx;
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 90b437ccbe2..b9bd69a2ec7 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -2601,8 +2601,7 @@ enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos);
  * @param[in] avpkt The input AVPacket containing the input buffer.
  */
 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
-                            int *got_sub_ptr,
-                            AVPacket *avpkt);
+                             int *got_sub_ptr, const AVPacket *avpkt);
 
 /**
  * Supply raw packet data as input to a decoder.
diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index 0abc88737b2..45c1f085792 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -780,8 +780,8 @@ static void get_subtitle_defaults(AVSubtitle *sub)
 }
 
 #define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
-static int recode_subtitle(AVCodecContext *avctx, AVPacket **outpkt,
-                           AVPacket *inpkt, AVPacket *buf_pkt)
+static int recode_subtitle(AVCodecContext *avctx, const AVPacket **outpkt,
+                           const AVPacket *inpkt, AVPacket *buf_pkt)
 {
 #if CONFIG_ICONV
     iconv_t cd = (iconv_t)-1;
@@ -861,8 +861,7 @@ static int utf8_check(const uint8_t *str)
 }
 
 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
-                             int *got_sub_ptr,
-                             AVPacket *avpkt)
+                             int *got_sub_ptr, const AVPacket *avpkt)
 {
     int ret = 0;
 
@@ -882,7 +881,7 @@ int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
 
     if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
         AVCodecInternal *avci = avctx->internal;
-        AVPacket *pkt;
+        const AVPacket *pkt;
 
         ret = recode_subtitle(avctx, &pkt, avpkt, avci->buffer_pkt);
         if (ret < 0)
diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index a20345db5c6..8e89b613c07 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -81,8 +81,8 @@ static const FFCodec *AVCodecInitialize(enum AVCodecID codec_id)
     return ffcodec(res);
 }
 
-static int subtitle_handler(AVCodecContext *avctx, void *frame,
-                            int *got_sub_ptr, AVPacket *avpkt)
+static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused,
+                            int *got_sub_ptr, const AVPacket *avpkt)
 {
     AVSubtitle sub;
     int ret = avcodec_decode_subtitle2(avctx, &sub, got_sub_ptr, avpkt);
