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avformat/hlsenc: add option hls_init_time to set init hls window segment duration 

recover segments duration time by hls_time after init hls window.
This is reuqested by Ibrahim Tachijian

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Steven Liu 2016-08-27 19:11:14 +08:00 committed by Michael Niedermayer
parent a37e6dd2ba
commit 557ad3a474
1 changed files with 11 additions and 1 deletions
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12
libavformat/hlsenc.c
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@ -85,6 +85,7 @@ typedef struct HLSContext {
AVFormatContext *vtt_avf;
float time; // Set by a private option.
float init_time; // Set by a private option.
int max_nb_segments; // Set by a private option.
int wrap; // Set by a private option.
uint32_t flags; // enum HLSFlags
@ -706,7 +707,7 @@ static int hls_write_header(AVFormatContext *s)
int vtt_basename_size;
hls->sequence = hls->start_sequence;
hls->recording_time = hls->time * AV_TIME_BASE;
hls->recording_time = (hls->init_time ? hls->init_time : hls->time) * AV_TIME_BASE;
hls->start_pts = AV_NOPTS_VALUE;
if (hls->format_options_str) {
@ -863,6 +864,14 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
int ret, can_split = 1;
int stream_index = 0;
if (hls->sequence - hls->nb_entries > hls->start_sequence && hls->init_time > 0) {
/* reset end_pts, hls->recording_time at end of the init hls list */
int init_list_dur = hls->init_time * hls->nb_entries * AV_TIME_BASE;
int after_init_list_dur = (hls->sequence - hls->nb_entries ) * hls->time * AV_TIME_BASE;
hls->recording_time = hls->time * AV_TIME_BASE;
end_pts = init_list_dur + after_init_list_dur ;
}
if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
oc = hls->vtt_avf;
stream_index = 0;
@ -972,6 +981,7 @@ static int hls_write_trailer(struct AVFormatContext *s)
static const AVOption options[] = {
{"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
{"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
{"hls_init_time", "set segment length in seconds at init list", OFFSET(init_time), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, FLT_MAX, E},
{"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
{"hls_ts_options","set hls mpegts list of options for the container format used for hls", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_vtt_options","set hls vtt list of options for the container format used for hls", OFFSET(vtt_format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},