diff options
| -rw-r--r-- | doc/ffmpeg-formats.texi | 5 | ||||
| -rw-r--r-- | libavformat/avformat.h | 7 | ||||
| -rw-r--r-- | libavformat/mux.c | 2 | ||||
| -rw-r--r-- | libavformat/options_table.h | 1 |
4 files changed, 15 insertions, 0 deletions
diff --git a/doc/ffmpeg-formats.texi b/doc/ffmpeg-formats.texi index db9215c616..1dce6e7584 100644 --- a/doc/ffmpeg-formats.texi +++ b/doc/ffmpeg-formats.texi @@ -151,6 +151,11 @@ been without shifting. Also note that this affects only leading negative timestamps, and not non-monotonic negative timestamps. + +@item flush_packets @var{integer} (@emph{output}) +Flush the underlying I/O stream after each packet. Default 1 enables it, and +has the effect of reducing the latency; 0 disables it and may slightly +increase performance in some cases. @end table @c man end FORMAT OPTIONS diff --git a/libavformat/avformat.h b/libavformat/avformat.h index 4b8731cb86..549a0fa45f 100644 --- a/libavformat/avformat.h +++ b/libavformat/avformat.h @@ -1213,6 +1213,13 @@ typedef struct AVFormatContext { */ int seek2any; + /** + * Flush the I/O context after each packet. + * - encoding: Set by user via AVOptions (NO direct access) + * - decoding: unused + */ + int flush_packets; + /***************************************************************** * All fields below this line are not part of the public API. They * may not be used outside of libavformat and can be changed and diff --git a/libavformat/mux.c b/libavformat/mux.c index 3578a52034..29ab3f5dc2 100644 --- a/libavformat/mux.c +++ b/libavformat/mux.c @@ -494,6 +494,8 @@ static inline int split_write_packet(AVFormatContext *s, AVPacket *pkt) did_split = av_packet_split_side_data(pkt); ret = s->oformat->write_packet(s, pkt); + if (s->flush_packets && s->pb && s->pb->error >= 0) + avio_flush(s->pb); if (did_split) av_packet_merge_side_data(pkt); return ret; diff --git a/libavformat/options_table.h b/libavformat/options_table.h index 6750050c1f..9f8613764c 100644 --- a/libavformat/options_table.h +++ b/libavformat/options_table.h @@ -75,6 +75,7 @@ static const AVOption options[]={ {"avoid_negative_ts", "shift timestamps to make them positive. 1 enables, 0 disables, default of -1 enables when required by target format.", OFFSET(avoid_negative_ts), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, E}, {"skip_initial_bytes", "skip initial bytes", OFFSET(skip_initial_bytes), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX-1, D}, {"correct_ts_overflow", "correct single timestamp overflows", OFFSET(correct_ts_overflow), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, D}, +{"flush_packets", "enable flushing of the I/O context after each packet", OFFSET(flush_packets), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E}, {NULL}, }; |