Seek back to old position after reading id3v1 tag.

FFmpeg did not seek back to the original position, but to "0", making
reading a VBR tag impossible.
(issue 2645)

diff --git a/libavformat/id3v1.c b/libavformat/id3v1.c
index e17e785..9bd10ca 100644 (file)
--- a/libavformat/id3v1.c
+++ b/libavformat/id3v1.c
@@ -227,6 +227,7 @@ void ff_id3v1_read(AVFormatContext *s)
 {
     int ret, filesize;
     uint8_t buf[ID3v1_TAG_SIZE];
+    int64_t position = url_ftell(s->pb);
 
     if (!url_is_streamed(s->pb)) {
         /* XXX: change that */
@@ -237,7 +238,7 @@ void ff_id3v1_read(AVFormatContext *s)
             if (ret == ID3v1_TAG_SIZE) {
                 parse_tag(s, buf);
             }
-            avio_seek(s->pb, 0, SEEK_SET);
+            avio_seek(s->pb, position, SEEK_SET);
         }
     }
 }