---
libavformat/avformat.h | 5 ++++-
libavformat/utils.c | 10 +++++++++-
libavformat/version.h | 2 +-
3 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 71aed80..e65cb41 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -380,6 +380,7 @@ typedef struct AVFormatParameters {
#define AVFMT_NOBINSEARCH 0x2000 /**< Format does not allow to fallback to
binary search via read_timestamp */
#define AVFMT_NOGENSEARCH 0x4000 /**< Format does not allow to fallback to
generic search */
#define AVFMT_NO_BYTE_SEEK 0x8000 /**< Format does not allow seeking by bytes
*/
+#define AVFMT_ALLOW_FLUSH 0x10000 /**< Format allows flushing. If not set,
the muxer will not receive a NULL packet in the write_packet function. */
/**
* @addtogroup lavf_encoding
@@ -1685,7 +1686,9 @@ attribute_deprecated int av_write_header(AVFormatContext
*s);
*
* @param s media file handle
* @param pkt The packet, which contains the stream_index, buf/buf_size,
- dts/pts, ...
+ * dts/pts, ...
+ * This can be NULL, in order to flush data buffered within the
+ * muxer.
* @return < 0 on error, = 0 if OK, 1 if end of stream wanted
*/
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 22ee13b..ffe82b1 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -3135,7 +3135,15 @@ static int compute_pkt_fields2(AVFormatContext *s,
AVStream *st, AVPacket *pkt){
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
{
- int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
+ int ret;
+
+ if (!pkt) {
+ if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
+ return s->oformat->write_packet(s, pkt);
+ return 0;
+ }
+
+ ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
return ret;
diff --git a/libavformat/version.h b/libavformat/version.h
index 009a60b..898f4b1 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,7 +30,7 @@
#include "libavutil/avutil.h"
#define LIBAVFORMAT_VERSION_MAJOR 53
-#define LIBAVFORMAT_VERSION_MINOR 21
+#define LIBAVFORMAT_VERSION_MINOR 22
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
--
1.7.3.1
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