diff --git a/libavcodec/proresdec.c b/libavcodec/proresdec.c
index 5c6b505527..b971d17972 100644
--- a/libavcodec/proresdec.c
+++ b/libavcodec/proresdec.c
@@ -189,6 +189,7 @@ static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
     int version;
     const uint8_t *ptr;
     enum AVPixelFormat pix_fmt;
+    int old_frame_type = ctx->frame_type;
 
     hdr_size = AV_RB16(buf);
     ff_dlog(avctx, "header size %d\n", hdr_size);
@@ -251,7 +252,8 @@ static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
         }
     }
 
-    if (pix_fmt != ctx->pix_fmt || dimensions_changed) {
+    if (pix_fmt != ctx->pix_fmt || dimensions_changed ||
+        ctx->frame_type != old_frame_type) {
 #define HWACCEL_MAX (CONFIG_PRORES_VIDEOTOOLBOX_HWACCEL + CONFIG_PRORES_VULKAN_HWACCEL)
 #if HWACCEL_MAX
         enum AVPixelFormat pix_fmts[HWACCEL_MAX + 2], *fmtp = pix_fmts;
@@ -856,6 +858,7 @@ static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
     ProresContext *cdst = dst->priv_data;
 
     cdst->pix_fmt = csrc->pix_fmt;
+    cdst->frame_type = csrc->frame_type;
 
     return 0;
 }