diff --git a/libavformat/mov.c b/libavformat/mov.c
index 2a701e9f70..f5e0c69ef3 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -2352,17 +2352,6 @@ FF_DISABLE_DEPRECATION_WARNINGS
             st->codec->time_base = av_inv_q(st->avg_frame_rate);
 FF_ENABLE_DEPRECATION_WARNINGS
 #endif
-            /* adjust for per frame dur in counter mode */
-            if (tmcd_ctx->tmcd_flags & 0x0008) {
-                int timescale = AV_RB32(st->codecpar->extradata + 8);
-                int framedur = AV_RB32(st->codecpar->extradata + 12);
-                st->avg_frame_rate = av_mul_q(st->avg_frame_rate, (AVRational){timescale, framedur});
-#if FF_API_LAVF_AVCTX
-FF_DISABLE_DEPRECATION_WARNINGS
-                st->codec->time_base = av_mul_q(st->codec->time_base , (AVRational){framedur, timescale});
-FF_ENABLE_DEPRECATION_WARNINGS
-#endif
-            }
             if (size > 30) {
                 uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
                 uint32_t format = AV_RB32(st->codecpar->extradata + 22);