diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
index 3f034bc31a..417a1c1986 100644
--- a/libavformat/flvenc.c
+++ b/libavformat/flvenc.c
@@ -446,8 +446,13 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
         }
     } else if (enc->codec_id == CODEC_ID_AAC && pkt->size > 2 &&
                (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
-        av_log(s, AV_LOG_ERROR, "malformated aac bitstream, use -absf aac_adtstoasc\n");
-        return -1;
+        if (!s->streams[pkt->stream_index]->nb_frames) {
+        av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
+               "use audio bitstream filter 'aac_adtstoasc' to fix it "
+               "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
+        return AVERROR_INVALIDDATA;
+        }
+        av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
     }
     if (flv->delay == AV_NOPTS_VALUE)
         flv->delay = -pkt->dts;
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 0d0d3e0c94..fdde5176a0 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -2595,8 +2595,11 @@ static int mov_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
         }
     } else if (enc->codec_id == CODEC_ID_AAC && pkt->size > 2 &&
                (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
+        if (!s->streams[pkt->stream_index]->nb_frames) {
         av_log(s, AV_LOG_ERROR, "malformated aac bitstream, use -absf aac_adtstoasc\n");
         return -1;
+        }
+        av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
     } else {
         avio_write(pb, pkt->data, size);
     }