When user use the hls_wrap, there have many problem:
1. some platform refersh the old but usefull segment
2. CDN(Content Delivery Network) Deliver HLS not friendly

The hls_wrap is used to wrap segments for use little space,
now user can use hls_list_size and hls_flags delete_segments
instead it.
Reviewed-by: NMichael Niedermayer <michael@niedermayer.cc>
Reviewed-by: NCarl Eugen Hoyos <ceffmpeg@gmail.com>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

Adds a `-hls_flags +temp_file` which will write segment data to
filename.tmp, and then rename to filename when the segment is complete.

This patch is similar in spirit to one used in Plex's ffmpeg fork, and
allows a transcoding webserver to ensure incomplete segment files are
never served up accidentally.
Reviewed-by: NHendrik Leppkes <h.leppkes@gmail.com>
Reviewed-by: NBodecs Bela <bodecsb@vivanet.hu>
Signed-off-by: NAman Gupta <aman@tmm1.net>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

Reviewed-by: NBodecs Bela <bodecsb@vivanet.hu>
Reviewed-by: NJames Almer <jamrial@gmail.com>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

When use http method to delete the old segments,
there is only io_open, hove not io_close yet,
this patch is used to fix it
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

when push hls to http server, the old segemnts can not delete by hls formats.
so add the http option into hls_delete_old_segments
Reported-by: NYin Jiaoyuan <yinjiaoyuan@163.com>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

because the oc have been  potint to hls->avf or hls->vtt_avf
here is not needed point once again
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

when hlsenc use flag second_level_segment_index,
second_level_segment_size and second_level_segment_duration,
the rename is ok but the output filename always use the old filename
so move the rename operation after the close the ts file and
before open new segment
Reported-by: NChristian Johannesen <chrisjohannesen@gmail.com>
Reviewed-by: NBodecs Bela <bodecsb@vivanet.hu>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

start_number option starts the playlist sequence number
(#EXT-X-MEDIA-SEQUENCE) from the specified number. Unless hls_flags
single_file is set, it also specifies starting sequence numbers of
segment and subtitle filenames. Sometimes it is usefull to have unique
starting numbers at each run, but currently it is only achiveable by
setting this parameter manually.
This patch enables to specify start_number source parameter by
introducing hls_start_number_source with 3 possible values:
generic/epoch/datetime. This ensures to set start sequence number
automatically for practically unique numbers. Generic option is the
default and this is the curent behaviour: start_number option value
specifies the start sequence number. (start_number default value is 0)
If hls_start_number_source is set to epoch, then the start number will
be the seconds since epoch (1970-01-01 00:00:00). If set to datetime,
then the start sequence number will be based on the current date/time
value as YYYYmmddHHMMSS. e.g. 20161231235659.
Hls speficication allows 64 bit integers as sequence numbers. This patch
also changes some code where only 32 bit integer values were handled
correctly.
Reviewed-by: NMoritz Barsnick <barsnick@gmx.net>
Signed-off-by: NBela Bodecs <bodecsb@vivanet.hu>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

when the segments largest duration value is look like 4.000000, the
EXT-X-TARGETDURATION value should equ 4.
it's wrong when hlsenc use ceil, so fix it.
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

 problem

fix ticket: #6067

Tested-by: Pero
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

CID: 1398228
Passing null pointer dirname to strlen, which dereferences it.
Reviewed-by: NMichael Niedermayer <michael@niedermayer.cc>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

in get_default_pattern_localtime_fmt the default pattern contains
%Y%m%d%H%I%S but the original intention was %Y%m%d%H%M%S
Signed-off-by: NBela Bodecs <bodecsb@vivanet.hu>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

fix CID: 1398364 Resource leak
refine the code of the new options
Reviewed-by: NBodecs Bela <bodecsb@vivanet.hu>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

A wrong, unitialized variable is used for testing. This patch fixes this
typo.
Signed-off-by: NBela Bodecs <bodecsb@vivanet.hu>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

1st:
This patch makes it possible to put actual segment file size (measured
in bytes) and/or duration (calculated in microseconds) into segment
filenames. This feature is useful when post-processing live streaming
access log files. New behaviour works only when -use_localtime option
is set and second_level_segment_size or/and
second_level_segment_duration new hls_flags are specified. %%s is the
placeholder for size and %%t for duration in hls_segment_filename
option. Fix sized trailing zeropadding also works eg. %%09s or %%023t.

A command to test new features:
./ffmpeg -loglevel info -y -f lavfi -i color=c=red:size=640x480:r=25 -f
lavfi -i sine=f=440:b=4:r=44100 -c:v mpeg2video -g 25 -acodec aac
-cutoff 20000 -ac 2 -ar 44100 -ab 192k -f hls -hls_time 3 -hls_list_size
5 -hls_flags
second_level_segment_index+second_level_segment_size+second_level_segment_duration
-use_localtime 1 -use_localtime_mkdir 1 -hls_segment_filename
"segment_%Y%m%d%H%M%S_%%04d_%%08s_%%013t.ts" stream.m3u8

2nd:
doc/muxers: beside second_level_segment_duration and second_level_segment_size,
added some more details and example to hls_segment_filename,
use_localtime, use_localtime_mkdir, hls_flags. hls_flags option list
reformatted to table
Signed-off-by: NBela Bodecs <bodecsb@vivanet.hu>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

Current implementation of finding duplicate segment filenames may fail
if use_localtime_mkdir and use_localtime are in effect and
segment_filename option expression contains subdirectories with
date/time specifiers. This patch fixes this false behaviour.
Signed-off-by: NBela Bodecs <bodecsb@vivanet.hu>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

in hlcenc.c, in the hls_write_header() function the default format
string for strftime() function contains %s specifier when use_localtime
is true. This %s specifier will insert the seconds since EPOCH. But %s
is not available on all system/environment. This patch check %s
availabilty at runtine and alter the default format string if necessary.
Signed-off-by: NBela Bodecs <bodecsb@vivanet.hu>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

When delete_segments hls_flag is specified, deleting old segments may
fail in certain cases when use_localtime_mkdir is in effect and
hls_segment_filename expression contains subdirs. This patch fixes this
behaviour.
Signed-off-by: NBela Bodecs <bodecsb@vivanet.hu>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

 in filenames

Putting date/time values into segment filenames is very usefull.
But to produce non-conflicting segment filenames with -use_localtime
option with date/time
values in hls_segment_filename option, sometimes is not enough.
Like in cases when multiple segments produced in the same second.
But hlsenc currently does not make possible to use segment index (%d) at
the

same time whe use_localtime is in effect, due to identifier conflict.
This patch makes possible to use strftime identifiers and still put
segment index (%d) at same time in segment filenames by introducing
second_level_segment_index flag. When -use_localtime is active,
identifier %d is for month day index, so %%d is the segment index
placeholder. This enhanced behaviour only exists when new
second_level_segment_index flag is specified.
For instance putting 'segment_%Y%m%d%H%M%S_%%05d.ts' value into
-hls_segment_filename option and specifing -hls_flags
second_level_segment_index and -use_localtime 1, may produce segment
filename as 'segment_20161230235758_00002.ts'

An example:

ffmpeg -loglevel info -y -f lavfi -i color=c=red:size=640x480:r=25 -f
lavfi -i anullsrc=r=44100:cl=stereo -c:v mpeg2video -g 25 -acodec aac
-cutoff 20000 -ac 2 -ar 44100 -ab 192k -f hls -hls_time 3 -hls_list_size
5 -hls_flags delete_segments+second_level_segment_index -use_localtime 1
-hls_segment_filename "segment_%Y%m%d%H%M%S_%%05d.ts" stream.m3u8

will produce segments filenames:

....
segment_20161227005902_00013.ts
segment_20161227005902_00014.ts
segment_20161227005902_00015.ts
segment_20161227005903_00016.ts
segment_20161227005903_00017.ts
segment_20161227005903_00018.ts
segment_20161227005903_00019.ts
segment_20161227005903_00020.ts
....
Signed-off-by: NBela Bodecs <bodecsb@vivanet.hu>

initial_prog_date_time shouldn't be adjusted when deleting segments
from disk, but rather when segments are removed from the playlist.
Signed-off-by: NJesper Ek <deadbeef84@gmail.com>
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

  ffmpeg-devel

with use_localtime parameter hlsenc may produce identical filenames for
different but still existing segments. It happens when
hls_segment_filename contains
syntacticaly correct but inadequate format parameters. Currently there
is no any log message when such a situaton occurs but these cases should
be avoided in most times. This patch generate warning log messages in
these cases.

ticketID: #6043
Signed-off-by: NBela Bodecs <bodecsb@vivanet.hu>
Signed-off-by: Steven Liu <lingjiujianke@gmail.com>

when use fix ticket 2nd problem.

command line test step:
rm -rf output*;./ffmpeg  -i ~/Movies/objectC/facebook.mp4 -an -c:v copy
-f hls -hls_time 4 -hls_list_size 5 -hls_flags +delete_segments
-hls_flags +append_list -hls_flags +omit_endlist -hls_flags
+discont_start -t 50 output.m3u8
./ffmpeg -i ~/Movies/objectC/facebook.mp4 -an -c:v libx264 -g 4 -f hls
-hls_time 4 -hls_list_size 5 -hls_flags +delete_segments -hls_flags
+append_list -hls_flags +omit_endlist -hls_flags +discont_start -t 5
output.m3u8
./ffmpeg -i ~/Movies/objectC/facebook.mp4 -an -c:v libx264 -g 4 -f hls
-hls_time 4 -hls_list_size 5 -hls_flags +delete_segments -hls_flags
+append_list -hls_flags +omit_endlist -hls_flags +discont_start -t 5
output.m3u8

result:
 #EXTM3U
 #EXT-X-VERSION:3
 #EXT-X-TARGETDURATION:5
 #EXT-X-MEDIA-SEQUENCE:6
 #EXTINF:4.120000,
 output6.ts
 #EXT-X-DISCONTINUITY
 #EXTINF:4.000000,
 output7.ts
 #EXTINF:0.960000,
 output8.ts
 #EXT-X-DISCONTINUITY
 #EXTINF:4.000000,
 output9.ts
 #EXTINF:0.960000,
 output10.ts
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

add EXT-X-DISCONTINUITY tag at the position of the append point.
Signed-off-by: NSteven Liu <lq@chinaffmpeg.org>

Fixes https://trac.ffmpeg.org/ticket/5940#ticketReviewed-by: NMichael Niedermayer <&lt;michael@niedermayer.cc&gt;>
Signed-off-by: NRobert Nagy <ronag89@gmail.com>
Signed-off-by: Steven Liu <lingjiujianke@gmail.com>

breaks API

Found-by: jamrial
This reverts commit 1a956c64.

Signed-off-by: Nrogerdpack <rogerpack2005@gmail.com>
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMoritz Barsnick <barsnick@gmx.net>
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

before patch:

localhost:osx liuqi$ tree 20160926/
20160926/
└── file-20160909
    └── 26
        └── 16
            └── 15
                ├── 46
                │   ├── 13.ts
                │   ├── 25.ts
                │   ├── 36.ts
                │   ├── 45.ts
                │   └── 54.ts
                └── 47
                    ├── 04.ts
                    ├── 14.ts
                    ├── 24.ts
                    └── 35.ts

6 directories, 9 files
localhost:osx liuqi$ cat out.m3u8
 #EXTM3U
 #EXT-X-VERSION:3
 #EXT-X-TARGETDURATION:12
 #EXT-X-MEDIA-SEQUENCE:0
 #EXTINF:11.360000,
 13.ts
 #EXTINF:10.800000,
 25.ts
 #EXTINF:9.120000,
 36.ts
 #EXTINF:8.760000,
 45.ts
 #EXTINF:10.200000,
 54.ts
 #EXTINF:10.720000,
 04.ts
 #EXTINF:9.600000,
 14.ts
 #EXTINF:10.600000,
 24.ts
 #EXTINF:8.760000,
 35.ts
 #EXT-X-ENDLIST

after patch:

localhost:osx liuqi$ tree 20160926/
20160926/
└── file-20160909
    └── 26
        └── 16
            └── 15
                ├── 46
                │   ├── 13.ts
                │   ├── 25.ts
                │   ├── 36.ts
                │   ├── 45.ts
                │   └── 54.ts
                └── 47
                    ├── 04.ts
                    ├── 14.ts
                    ├── 24.ts
                    └── 35.ts

6 directories, 9 files
localhost:osx liuqi$ cat out.m3u8
 #EXTM3U
 #EXT-X-VERSION:3
 #EXT-X-TARGETDURATION:12
 #EXT-X-MEDIA-SEQUENCE:0
 #EXTINF:11.360000,
 20160926/file-20160909/26/16/15/46/13.ts
 #EXTINF:10.800000,
 20160926/file-20160909/26/16/15/46/25.ts
 #EXTINF:9.120000,
 20160926/file-20160909/26/16/15/46/36.ts
 #EXTINF:8.760000,
 20160926/file-20160909/26/16/15/46/45.ts
 #EXTINF:10.200000,
 20160926/file-20160909/26/16/15/46/54.ts
 #EXTINF:10.720000,
 20160926/file-20160909/26/16/15/47/04.ts
 #EXTINF:9.600000,
 20160926/file-20160909/26/16/15/47/14.ts
 #EXTINF:10.600000,
 20160926/file-20160909/26/16/15/47/24.ts
 #EXTINF:8.760000,
 20160926/file-20160909/26/16/15/47/35.ts
 #EXT-X-ENDLIST
Signed-off-by: Steven Liu <lingjiujianke@gmail.com>

when use use_localtime_mkdir to create multi level dir,
ffmpeg give error message:
ffmpeg -re -i ~/Movies/objectC/facebook.mp4 -c copy -use_localtime 1
 -use_localtime_mkdir 1 -hls_segment_filename '%Y%m%d/file-%Y%m%d/%s.ts'
out.m3u8
error message:
Could not create directory 20160926/file-20160926 with use_localtime_mkdir
add mkdir_p for support the multi level dir
Reviewed-by: NMichael Niedermayer <michael@niedermayer.cc>
Tested-by: Zuo Genyu <1515161258@qq.com> (Windows)
Signed-off-by: Steven Liu <lingjiujianke@gmail.com>

refine EXT-X-BYTERANGE tag,
the spec link:
https://tools.ietf.org/html/draft-pantos-http-live-streaming-19#section-4.3.2.2
the apple doc:
https://developer.apple.com/library/ios/technotes/tn2288/_index.html#
//apple_ref/doc/uid/DTS40012238-CH1-BYTE_RANGE_SUPPORT_FOR_SEGMENTS

command line:
./ffmpeg -i ~/Movies/objectC/a.mp4 -c copy -f hls -hls_time 7
 -hls_list_size 0 -hls_segment_size 2500000 -t 40 output-test.m3u8
output:
localhost:ffmpeg liuqi$ ll *.ts ;cat output-test.m3u8
 -rw-r--r--  1 liuqi  staff  2792176  9 12 14:44 output-test0.ts
 -rw-r--r--  1 liuqi  staff  3112528  9 12 14:44 output-test3.ts
 -rw-r--r--  1 liuqi  staff  3377420  9 12 14:44 output-test6.ts
 -rw-r--r--  1 liuqi  staff  1228016  9 12 14:44 output-test7.ts
 #EXTM3U
 #EXT-X-VERSION:4
 #EXT-X-TARGETDURATION:10
 #EXT-X-MEDIA-SEQUENCE:0
 #EXTINF:9.021000,
 #EXT-X-BYTERANGE:1334988@0
 output-test0.ts
 #EXTINF:3.000000,
 #EXT-X-BYTERANGE:721356@1334988
 output-test0.ts
 #EXTINF:3.000000,
 #EXT-X-BYTERANGE:735832@2056344
 output-test0.ts
 #EXTINF:6.000000,
 #EXT-X-BYTERANGE:1645940@0
 output-test3.ts
 #EXTINF:3.000000,
 #EXT-X-BYTERANGE:715152@1645940
 output-test3.ts
 #EXTINF:3.000000,
 #EXT-X-BYTERANGE:751436@2361092
 output-test3.ts
 #EXTINF:9.000000,
 #EXT-X-BYTERANGE:3377420@0
 output-test6.ts
 #EXTINF:3.960000,
 #EXT-X-BYTERANGE:1228016@0
 output-test7.ts
 #EXT-X-ENDLIST
 localhost:ffmpeg liuqi$

 ticket-id: #5839
Signed-off-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

This should fix the code on windows
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Reviewed-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

This patch is a fix for the bug with ticket number 5812
(https://trac.ffmpeg.org/ticket/5812).

Basically, the bug is that the last segment and the "#EXT-X-ENDLIST"
tag are not being written to the subtitle playlist file when
converting a file with subtitles to the HLS format. The reason for
this seem to be that the filename for the subtitle file is being freed
too early. This solution is simply to free that memory after it's last
use in the "hls_window" function.
Signed-off-by: NFranklin Phillips <franklinphillips9p8@inbox.lv>
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

When use append_list mode, the hls_init_time set nouse,
Because the append_list only support append at the old m3u8 end
cannot set init segments durations at the middle of the list.
That's invalid. and show a warning message for user.
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

recover segments duration time by hls_time after init hls window.
This is reuqested by Ibrahim Tachijian
Reviewed-by: NMichael Niedermayer <michael@niedermayer.cc>
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>