[FFmpeg-devel] [PATCH] add option hls_init_time to set init hls window segment duration
Steven Liu
lingjiujianke at gmail.com
Fri Aug 26 12:12:44 EEST 2016
2016-08-26 17:11 GMT+08:00 Steven Liu <lingjiujianke at gmail.com>:
> recover segments duration time by hls_time after init hls window.
> This is reuqested by Ibrahim Tachijian
>
> Signed-off-by: LiuQi <liuqi at gosun.com>
> —
> libavformat/hlsenc.c | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff —git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
> index e65f002..f5ceb60 100644
> — a/libavformat/hlsenc.c
> +++ b/libavformat/hlsenc.c
> @@ -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) {
> @@ -860,9 +861,19 @@ static int hls_write_packet(AVFormatContext *s,
> AVPacket *pkt)
> AVStream *st = s->streams[pkt->stream_index];
> int64_t end_pts = hls->recording_time * hls->number;
> int is_ref_pkt = 1;
> + int init_list_dur = 0;
> + int after_init_list_dur = 0;
> 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
> */
> + init_list_dur = hls->init_time * hls->nb_entries * AV_TIME_BASE;
> + 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 +983,7 @@ 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},
> —
> 2.7.4 (Apple Git-66)
>
> localhost:ffmpeg liuqi$ ./ffmpeg -v verbose -re -i
~/Movies/objectC/facebook.mp4 -c copy -f hls -hls_init_time 1 -hls_time 5
-hls_flags split_by_time output_test.m3u8
ffmpeg version N-81462-gbcd1153 Copyright (c) 2000-2016 the FFmpeg
developers
built with Apple LLVM version 7.3.0 (clang-703.0.31)
configuration: --enable-fontconfig --enable-gpl --enable-libass
--enable-libbluray --enable-libfreetype --enable-libmp3lame
--enable-libspeex --enable-libx264 --enable-libx265 --enable-version3
libavutil 55. 29.100 / 55. 29.100
libavcodec 57. 54.100 / 57. 54.100
libavformat 57. 48.100 / 57. 48.100
libavdevice 57. 0.102 / 57. 0.102
libavfilter 6. 55.100 / 6. 55.100
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100
libpostproc 54. 0.100 / 54. 0.100
[h264 @ 0x7fedf4017600] Reinit context to 1280x720, pix_fmt: yuv420p
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/liuqi/Movies/objectC/
facebook.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1
creation_time : 2015-02-02 18:19:19
Duration: 00:45:02.06, start: 0.000000, bitrate: 2708 kb/s
Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 /
0x31637661), yuv420p, 1280x714 (1280x720) [SAR 1:1 DAR 640:357], 2576 kb/s,
25 fps, 25 tbr, 25k tbn, 50 tbc (default)
Metadata:
creation_time : 2015-02-02 18:19:19
handler_name : GPAC ISO Video Handler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 127 kb/s (default)
Metadata:
creation_time : 2015-02-02 18:19:23
handler_name : GPAC ISO Audio Handler
[hls @ 0x7fedf4000600] Using AVStream.codec to pass codec parameters to
muxers is deprecated, use AVStream.codecpar instead.
Last message repeated 1 times
[mpegts @ 0x7fedf3008a00] muxrate VBR, pcr every 5 pkts, sdt every
2147483647, pat/pmt every 2147483647 pkts
Output #0, hls, to 'output_test.m3u8':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1
encoder : Lavf57.48.100
Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 /
0x31637661), yuv420p, 1280x714 (0x0) [SAR 1:1 DAR 640:357], q=2-31, 2576
kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
Metadata:
creation_time : 2015-02-02 18:19:19
handler_name : GPAC ISO Video Handler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, 127 kb/s (default)
Metadata:
creation_time : 2015-02-02 18:19:23
handler_name : GPAC ISO Audio Handler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
Automatically inserted bitstream filter 'h264_mp4toannexb'; args=''
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:00:00.52 bitrate=N/A speed=1.02x
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:00:01.56 bitrate=N/A speed=1.03x
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:00:03.08 bitrate=N/A speed=1.01x
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:00:03.56 bitrate=N/A speed= 1x
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:00:05.12 bitrate=N/A speed=1.01x
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:10:06.12 bitrate=N/A speed= 1x
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:20:09.70 bitrate=N/A speed= 1x
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:30:14.80 bitrate=N/A speed= 1x
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:40:19.88 bitrate=N/A speed= 1x
[hls @ 0x7fedf4000600] EXT-X-MEDIA-SEQUENCE:50:20.90 bitrate=N/A speed= 1x
frame= 529 fps= 25 q=-1.0 Lsize=N/A time=00:00:21.35 bitrate=N/A speed=
1x
video:6506kB audio:324kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
Input file #0 (/Users/liuqi/Movies/objectC/facebook.mp4):
Input stream #0:0 (video): 529 packets read (6661710 bytes);
Input stream #0:1 (audio): 1001 packets read (332091 bytes);
Total: 1530 packets (6993801 bytes) demuxed
Output file #0 (output_test.m3u8):
Output stream #0:0 (video): 529 packets muxed (6661710 bytes);
Output stream #0:1 (audio): 1001 packets muxed (332091 bytes);
Total: 1530 packets (6993801 bytes) muxed
localhost:ffmpeg liuqi$
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