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add split_by_time flag for support splite mpegts segment at non-keyframe 

support split hls segment at duration set by hls_time

Signed-off-by: LiuQi <liuqi@gosun.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Steven Liu 2016-07-07 06:51:20 +08:00 committed by Michael Niedermayer
parent 593987810e
commit b45a976ed4
2 changed files with 9 additions and 1 deletions
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6
doc/muxers.texi
View File

@ -495,6 +495,12 @@ Will produce the playlist, @file{out.m3u8}, and a single segment file,
Segment files removed from the playlist are deleted after a period of time
equal to the duration of the segment plus the duration of the playlist.
@item hls_flags split_by_time
If this flags is set, allow segments to start on frames other than keyframes.
Thisimproves behavior on some players when the time between keyframes is
inconsistent, but may make things worse on others, and can cause some oddities
during seeking. This flag should be used with hls_time option.
@item hls_playlist_type event
Emit @code{#EXT-X-PLAYLIST-TYPE:EVENT} in the m3u8 header. Forces
@option{hls_list_size} to 0; the playlist can only be appended to.

4
libavformat/hlsenc.c
View File

@ -62,6 +62,7 @@ typedef enum HLSFlags {
HLS_ROUND_DURATIONS = (1 << 2),
HLS_DISCONT_START = (1 << 3),
HLS_OMIT_ENDLIST = (1 << 4),
HLS_SPLIT_BY_TIME = (1 << 5),
} HLSFlags;
typedef enum {
@ -813,7 +814,7 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
if (hls->has_video) {
can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
pkt->flags & AV_PKT_FLAG_KEY;
((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
}
if (pkt->pts == AV_NOPTS_VALUE)
@ -923,6 +924,7 @@ static const AVOption options[] = {
{"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
{"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
{"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
{"split_by_time", "split the hls segment by time which user set by hls_time", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SPLIT_BY_TIME }, 0, UINT_MAX, E, "flags"},
{"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"hls_playlist_type", "set the HLS playlist type", OFFSET(pl_type), AV_OPT_TYPE_INT, {.i64 = PLAYLIST_TYPE_NONE }, 0, PLAYLIST_TYPE_NB-1, E, "pl_type" },