diff --git a/libavformat/mux.c b/libavformat/mux.c
index 0d285f4a59..77823a4e75 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -309,12 +309,6 @@ FF_DISABLE_DEPRECATION_WARNINGS
 FF_ENABLE_DEPRECATION_WARNINGS
 #endif
 
-        /* update internal context from codecpar, old bsf api needs this
-         * FIXME: remove when autobsf uses new bsf API */
-        ret = avcodec_parameters_to_context(st->internal->avctx, st->codecpar);
-        if (ret < 0)
-            goto fail;
-
         if (!st->time_base.num) {
             /* fall back on the default timebase values */
             if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)