Signed-off-by: Marton Balint <c...@passwd.hu>
---
libavformat/mux.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavformat/mux.c b/libavformat/mux.c
index b1b65a1..f21b4dd 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -823,6 +823,11 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt)
if (!pkt) {
if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
+ if (!s->internal->header_written) {
+ ret = s->internal->write_header_ret ?
s->internal->write_header_ret : write_header_internal(s);
+ if (ret < 0)
+ return ret;
+ }
ret = s->oformat->write_packet(s, NULL);
if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags &
AVFMT_FLAG_FLUSH_PACKETS)
avio_flush(s->pb);
--
2.6.6
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