#5839: [feature request] [hls] hls_flags to limit single_file size
-------------------------------------+-------------------------------------
             Reporter:  ARQfBfnD     |                    Owner:  stevenliu
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  hls          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by stevenliu):

 Replying to [comment:16 ARQfBfnD]:
 > I tried your latest patch from the mailing list - it appears to do
 something, but the output files sizes (5MB+) are all over the place,
 nowhere near the number I specified (2.5MB)
 >
 >
 > {{{
 > root@28340ba48105:~# ./bin/ffmpeg  -i in.mov -c copy -hls_list_size 0
 -hls_segment_size 2500000 -t 60 -f hls -hls_time 10 -hls_segment_filename
 'file%03d.ts' output-test.m3u8
 > ffmpeg version N-81669-gb82c1a3 Copyright (c) 2000-2016 the FFmpeg
 developers
 >   built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.2) 20160609
 >   configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static
 --extra-cflags=-I/root/ffmpeg_build/include --extra-
 ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --enable-gpl --enable-
 libass --enable-libx264 --enable-nonfree
 >   libavutil      55. 29.100 / 55. 29.100
 >   libavcodec     57. 55.101 / 57. 55.101
 >   libavformat    57. 49.100 / 57. 49.100
 >   libavdevice    57.  0.102 / 57.  0.102
 >   libavfilter     6. 62.100 /  6. 62.100
 >   libswscale      4.  1.100 /  4.  1.100
 >   libswresample   2.  1.100 /  2.  1.100
 >   libpostproc    54.  0.100 / 54.  0.100
 > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mov':
 >   Metadata:
 >     major_brand     : qt
 >     minor_version   : 0
 >     compatible_brands: qt
 >     creation_time   : 2016-09-09T00:47:25.000000Z
 >   Duration: 03:29:46.96, start: 0.000000, bitrate: 5906 kb/s
 >     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661),
 yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 5760 kb/s, 25 fps, 25
 tbr, 2500 tbn, 50 tbc (default)
 >     Metadata:
 >       creation_time   : 2016-09-09T00:47:25.000000Z
 >       handler_name    : Core Media Data Handler
 >       encoder         : H.264
 >       timecode        : 00:00:00:00
 >     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 108 kb/s (default)
 >     Metadata:
 >       creation_time   : 2016-09-09T00:47:25.000000Z
 >       handler_name    : Core Media Data Handler
 >     Stream #0:2(und): Data: none (tmcd / 0x64636D74) (default)
 >     Metadata:
 >       creation_time   : 2016-09-09T00:47:25.000000Z
 >       handler_name    : Core Media Data Handler
 >       timecode        : 00:00:00:00
 > [hls @ 0x3741ac0] Using AVStream.codec to pass codec parameters to
 muxers is deprecated, use AVStream.codecpar instead.
 >     Last message repeated 1 times
 > Output #0, hls, to 'output-test.m3u8':
 >   Metadata:
 >     major_brand     : qt
 >     minor_version   : 0
 >     compatible_brands: qt
 >     encoder         : Lavf57.49.100
 >     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661),
 yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 5760 kb/s, 25
 fps, 25 tbr, 90k tbn, 25 tbc (default)
 >     Metadata:
 >       creation_time   : 2016-09-09T00:47:25.000000Z
 >       handler_name    : Core Media Data Handler
 >       encoder         : H.264
 >       timecode        : 00:00:00:00
 >     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, 108 kb/s (default)
 >     Metadata:
 >       creation_time   : 2016-09-09T00:47:25.000000Z
 >       handler_name    : Core Media Data Handler
 > Stream mapping:
 >   Stream #0:0 -> #0:0 (copy)
 >   Stream #0:1 -> #0:1 (copy)
 > Press [q] to stop, [?] for help
 > frame= 1501 fps=0.0 q=-1.0 Lsize=N/A time=00:01:00.01 bitrate=N/A speed=
 544x
 > video:43785kB audio:846kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: unknown
 > root@28340ba48105:~# ls -lh
 > -rw-r--r-- 1 root root 5.7M Sep 16 16:01 file000.ts
 > -rw-r--r-- 1 root root 5.7M Sep 16 16:01 file001.ts
 > -rw-r--r-- 1 root root 5.8M Sep 16 16:01 file002.ts
 > -rw-r--r-- 1 root root 5.8M Sep 16 16:01 file003.ts
 > -rw-r--r-- 1 root root  16M Sep 16 16:01 file004.ts
 > -rw-r--r-- 1 root root 7.0M Sep 16 16:01 file005.ts
 > -rw-r--r-- 1 root root  431 Sep 16 16:01 output-test.m3u8
 > }}}


 I saw your test mov is 5Mbps+ ,maybe your test way is wrong, isn't it?
 because hls split at keyframe default, if your GOP of the mov(avc codec),
 if the bitrate is too big than the value you set -hls_segment_size
 2500000, it's wrong,
 you can set 25000000 and check the result.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5839#comment:17>
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