diff --git a/libavformat/aiffdec.c b/libavformat/aiffdec.c
index c94863c285..4083316450 100644
--- a/libavformat/aiffdec.c
+++ b/libavformat/aiffdec.c
@@ -322,6 +322,8 @@ static int aiff_read_packet(AVFormatContext *s,
     if (res < 0)
         return res;
 
+    if (size >= st->codec->block_align)
+        pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     /* Only one stream in an AIFF file */
     pkt->stream_index = 0;
     pkt->duration     = (res / st->codec->block_align) * aiff->block_duration;
diff --git a/libavformat/apc.c b/libavformat/apc.c
index 389eba7b0a..2e160ccab5 100644
--- a/libavformat/apc.c
+++ b/libavformat/apc.c
@@ -76,6 +76,7 @@ static int apc_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
     if (av_get_packet(s->pb, pkt, MAX_READ_SIZE) <= 0)
         return AVERROR(EIO);
+    pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     pkt->stream_index = 0;
     return 0;
 }
diff --git a/libavformat/au.c b/libavformat/au.c
index aa52a96ea1..4dd84bfdeb 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -187,6 +187,7 @@ static int au_read_packet(AVFormatContext *s,
                        av_get_bits_per_sample(s->streams[0]->codec->codec_id) >> 3);
     if (ret < 0)
         return ret;
+    pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     pkt->stream_index = 0;
 
     /* note: we need to modify the packet size here to handle the last
diff --git a/libavformat/mp3dec.c b/libavformat/mp3dec.c
index 31d64b2921..edfee164b4 100644
--- a/libavformat/mp3dec.c
+++ b/libavformat/mp3dec.c
@@ -175,6 +175,7 @@ static int mp3_read_packet(AVFormatContext *s, AVPacket *pkt)
 
     ret= av_get_packet(s->pb, pkt, size);
 
+    pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     pkt->stream_index = 0;
     if (ret <= 0) {
         if(ret<0)
diff --git a/libavformat/pcmdec.c b/libavformat/pcmdec.c
index eacac2f353..94f6b4ae25 100644
--- a/libavformat/pcmdec.c
+++ b/libavformat/pcmdec.c
@@ -36,6 +36,7 @@ static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
 
     ret= av_get_packet(s->pb, pkt, size);
 
+    pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     pkt->stream_index = 0;
     if (ret < 0)
         return ret;
diff --git a/libavformat/rsodec.c b/libavformat/rsodec.c
index 1886116678..3933fc08c6 100644
--- a/libavformat/rsodec.c
+++ b/libavformat/rsodec.c
@@ -80,6 +80,7 @@ static int rso_read_packet(AVFormatContext *s, AVPacket *pkt)
     if (ret < 0)
         return ret;
 
+    pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     pkt->stream_index = 0;
 
     /* note: we need to modify the packet size here to handle the last packet */
diff --git a/libavformat/sol.c b/libavformat/sol.c
index 698502e036..b2ecd82c46 100644
--- a/libavformat/sol.c
+++ b/libavformat/sol.c
@@ -133,6 +133,7 @@ static int sol_read_packet(AVFormatContext *s,
     ret= av_get_packet(s->pb, pkt, MAX_SIZE);
     if (ret < 0)
         return ret;
+    pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     pkt->stream_index = 0;
 
     /* note: we need to modify the packet size here to handle the last
diff --git a/libavformat/soxdec.c b/libavformat/soxdec.c
index 9ca7673175..a0b65d9160 100644
--- a/libavformat/soxdec.c
+++ b/libavformat/soxdec.c
@@ -138,6 +138,7 @@ static int sox_read_packet(AVFormatContext *s,
     ret = av_get_packet(s->pb, pkt, size);
     if (ret < 0)
         return AVERROR(EIO);
+    pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     pkt->stream_index = 0;
     pkt->size = ret;
 
diff --git a/libavformat/utils.c b/libavformat/utils.c
index d6e7f69ec5..d9dc2fb731 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -297,6 +297,7 @@ int ffio_limit(AVIOContext *s, int size)
 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
 {
     int ret;
+    int orig_size = size;
     size= ffio_limit(s, size);
 
     ret= av_new_packet(pkt, size);
@@ -311,6 +312,8 @@ int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
         av_free_packet(pkt);
     else
         av_shrink_packet(pkt, ret);
+    if (pkt->size < orig_size)
+        pkt->flags |= AV_PKT_FLAG_CORRUPT;
 
     return ret;
 }