movenc: Don't rely on the fragment index for vc1 info gathering

The previous use of the mov->fragments field, for determining whether
written packets were part of the first fragment or not, didn't
work as intended when using the empty_moov flag.

Signed-off-by: Martin Storsjö <martin@martin.st>

1 files changed, 2 insertions, 0 deletions

diff --git a/libavformat/movenc.h b/libavformat/movenc.h
index 682820ed0e..3ac53059b4 100644
--- a/libavformat/movenc.h
+++ b/libavformat/movenc.h
@@ -131,6 +131,8 @@ typedef struct MOVTrack {
     struct {
         int     first_packet_seq;
         int     first_packet_entry;
+        int     first_packet_seen;
+        int     first_frag_written;
         int     packet_seq;
         int     packet_entry;
         int     slices;