diff options
| -rw-r--r-- | libavformat/mux.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavformat/mux.c b/libavformat/mux.c index b1b65a1e96..f21b4dd071 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); |