[FFmpeg-devel] [PATCH] add split_by_time flag for support splite mpegts segment at non-keyframe

[Steven Liu]

support split hls segment at duration set by hls_time

after the patch , the ffmpeg can split the mpegts for hls by hls_time
parameter

[root at localhost ffmpeg]# ./ffmpeg -i /root/facebook.mp4 -v quiet -c copy -f
hls -hls_time 3 -hls_flags split_by_time -bsf:v h264_mp4toannexb
-hls_list_size 20 -t 30 output_afterpatch.m3u8
[root at localhost ffmpeg]#
[root at localhost ffmpeg]#
[root at localhost ffmpeg]# cat output_afterpatch.m3u8
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:4
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:3.040000,
output_afterpatch0.ts
#EXTINF:3.160000,
output_afterpatch1.ts
#EXTINF:2.840000,
output_afterpatch2.ts
#EXTINF:3.160000,
output_afterpatch3.ts
#EXTINF:2.880000,
output_afterpatch4.ts
#EXTINF:3.080000,
output_afterpatch5.ts
#EXTINF:2.920000,
output_afterpatch6.ts
#EXTINF:3.120000,
output_afterpatch7.ts
#EXTINF:2.880000,
output_afterpatch8.ts
#EXTINF:2.960000,
output_afterpatch9.ts
#EXTINF:-0.040000,
output_afterpatch10.ts
#EXT-X-ENDLIST


support split hls segment at duration set by hls_time

Signed-off-by: LiuQi <liuqi at gosun.com>
---
 libavformat/hlsenc.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
index a9fa5d8..5dc518d 100644
--- a/libavformat/hlsenc.c
+++ b/libavformat/hlsenc.c
@@ -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" },
--
1.7.1
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