Mark truncated packets as corrupt in av_get_packet.

Manually remove that flag again for formats that read an arbitrary
amount of data and thus truncation is not an error.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

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;
 }