diff --git a/libavformat/ffmenc.c b/libavformat/ffmenc.c
index 10acfbe7a1..adb5019010 100644
--- a/libavformat/ffmenc.c
+++ b/libavformat/ffmenc.c
@@ -94,15 +94,18 @@ static void write_header_chunk(AVIOContext *pb, AVIOContext *dpb, unsigned id)
     av_free(dyn_buf);
 }
 
-static int ffm_write_header_codec_private_ctx(AVIOContext *pb, AVCodecContext *ctx, int type)
+static int ffm_write_header_codec_private_ctx(AVFormatContext *s, AVCodecContext *ctx, int type)
 {
+    AVIOContext *pb = s->pb;
     AVIOContext *tmp;
     char *buf = NULL;
     int ret;
     const AVCodec *enc = ctx->codec ? ctx->codec : avcodec_find_encoder(ctx->codec_id);
 
-    if (!enc)
-        return AVERROR(EINVAL);
+    if (!enc) {
+        av_log(s, AV_LOG_WARNING, "Stream codec is not found. Codec private options are not stored.\n");
+        return 0;
+    }
     if (ctx->priv_data && enc->priv_class && enc->priv_data_size) {
         if ((ret = av_opt_serialize(ctx->priv_data, AV_OPT_FLAG_ENCODING_PARAM | type,
                                     AV_OPT_SERIALIZE_SKIP_DEFAULTS, &buf, '=', ',')) < 0)
@@ -281,7 +284,7 @@ static int ffm_write_header(AVFormatContext *s)
                                                         st->recommended_encoder_configuration)) < 0)
                 return ret;
             } else if ((ret = ffm_write_header_codec_ctx(s->pb, codec, MKBETAG('S', '2', 'V', 'I'), AV_OPT_FLAG_VIDEO_PARAM)) < 0 ||
-                       (ret = ffm_write_header_codec_private_ctx(s->pb, codec, AV_OPT_FLAG_VIDEO_PARAM)) < 0)
+                       (ret = ffm_write_header_codec_private_ctx(s, codec, AV_OPT_FLAG_VIDEO_PARAM)) < 0)
                 return ret;
             break;
         case AVMEDIA_TYPE_AUDIO:
@@ -292,7 +295,7 @@ static int ffm_write_header(AVFormatContext *s)
                                                         st->recommended_encoder_configuration)) < 0)
                 return ret;
             } else if ((ret = ffm_write_header_codec_ctx(s->pb, codec, MKBETAG('S', '2', 'A', 'U'), AV_OPT_FLAG_AUDIO_PARAM)) < 0 ||
-                     (ret = ffm_write_header_codec_private_ctx(s->pb, codec, AV_OPT_FLAG_AUDIO_PARAM)) < 0)
+                     (ret = ffm_write_header_codec_private_ctx(s, codec, AV_OPT_FLAG_AUDIO_PARAM)) < 0)
                 return ret;
             break;
         default: