diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 7436b63cfb..2f248b1b2f 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -140,7 +140,7 @@ static int get_riff(AVFormatContext *s, AVIOContext *pb)
         if(!memcmp(header, avi_headers[i], 8))
             break;
     if(!avi_headers[i][0])
-        return -1;
+        return AVERROR_INVALIDDATA;
 
     if(header[7] == 0x19)
         av_log(s, AV_LOG_INFO, "This file has been generated by a totally broken muxer.\n");
@@ -168,26 +168,26 @@ static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
             longs_pre_entry,index_type, entries_in_use, chunk_id, base);
 
     if(stream_id >= s->nb_streams || stream_id < 0)
-        return -1;
+        return AVERROR_INVALIDDATA;
     st= s->streams[stream_id];
     ast = st->priv_data;
 
     if(index_sub_type)
-        return -1;
+        return AVERROR_INVALIDDATA;
 
     avio_rl32(pb);
 
     if(index_type && longs_pre_entry != 2)
-        return -1;
+        return AVERROR_INVALIDDATA;
     if(index_type>1)
-        return -1;
+        return AVERROR_INVALIDDATA;
 
     if(filesize > 0 && base >= filesize){
         av_log(s, AV_LOG_ERROR, "ODML index invalid\n");
         if(base>>32 == (base & 0xFFFFFFFF) && (base & 0xFFFFFFFF) < filesize && filesize <= 0xFFFFFFFF)
             base &= 0xFFFFFFFF;
         else
-            return -1;
+            return AVERROR_INVALIDDATA;
     }
 
     for(i=0; i<entries_in_use; i++){
@@ -201,7 +201,7 @@ static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
             av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len);
 #endif
             if(url_feof(pb))
-                return -1;
+                return AVERROR_INVALIDDATA;
 
             if(last_pos == pos || pos == base - 8)
                 avi->non_interleaved= 1;
@@ -218,13 +218,13 @@ static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
             duration = avio_rl32(pb);
 
             if(url_feof(pb))
-                return -1;
+                return AVERROR_INVALIDDATA;
 
             pos = avio_tell(pb);
 
             if(avi->odml_depth > MAX_ODML_DEPTH){
                 av_log(s, AV_LOG_ERROR, "Too deeply nested ODML indexes\n");
-                return -1;
+                return AVERROR_INVALIDDATA;
             }
 
             if(avio_seek(pb, offset+8, SEEK_SET) < 0)
@@ -279,10 +279,10 @@ static int avi_read_tag(AVFormatContext *s, AVStream *st, uint32_t tag, uint32_t
     size += (size & 1);
 
     if (size == UINT_MAX)
-        return -1;
+        return AVERROR(EINVAL);
     value = av_malloc(size+1);
     if (!value)
-        return -1;
+        return AVERROR(ENOMEM);
     avio_read(pb, value, size);
     value[size]=0;
 
@@ -367,8 +367,9 @@ static int avi_read_header(AVFormatContext *s)
 
     avi->stream_index= -1;
 
-    if (get_riff(s, pb) < 0)
-        return -1;
+    ret = get_riff(s, pb);
+    if (ret < 0)
+        return ret;
 
     av_log(avi, AV_LOG_DEBUG, "use odml:%d\n", avi->use_odml);
 
@@ -761,7 +762,9 @@ static int avi_read_header(AVFormatContext *s)
             break;
         case MKTAG('s', 't', 'r', 'n'):
             if(s->nb_streams){
-                avi_read_tag(s, s->streams[s->nb_streams-1], tag, size);
+                ret = avi_read_tag(s, s->streams[s->nb_streams-1], tag, size);
+                if (ret < 0)
+                    return ret;
                 break;
             }
         default:
@@ -784,7 +787,7 @@ static int avi_read_header(AVFormatContext *s)
     /* check stream number */
     if (stream_index != s->nb_streams - 1) {
     fail:
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
     if(!avi->index_loaded && pb->seekable)
@@ -1262,7 +1265,7 @@ static int avi_read_idx1(AVFormatContext *s, int size)
 
     nb_index_entries = size / 16;
     if (nb_index_entries <= 0)
-        return -1;
+        return AVERROR_INVALIDDATA;
 
     idx1_pos = avio_tell(pb);
     avio_seek(pb, avi->movi_list+4, SEEK_SET);
@@ -1304,7 +1307,6 @@ static int avi_read_idx1(AVFormatContext *s, int size)
 
         av_dlog(s, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
 
-
         // even if we have only a single stream, we should
         // switch to non-interleaved to get correct timestamps
         if(last_pos == pos)
@@ -1465,7 +1467,7 @@ static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
                    timestamp * FFMAX(ast->sample_size, 1),
                    st->index_entries[0].timestamp,
                    st->index_entries[st->nb_index_entries - 1].timestamp);
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
     /* find the position */