[FFmpeg-user] Encoding for Amazon Cloud Front HLS adaptive streaming. Peak rate too high.

Joel Lopez badassmexican at gmail.com
Thu Nov 10 17:20:50 EET 2016


On Nov 8, 2016 1:25 PM, "Joel Lopez" <badassmexican at gmail.com> wrote:
>
> On Tue, Nov 8, 2016 at 1:08 PM, Joel Lopez <badassmexican at gmail.com>
wrote:
> > On Mon, Nov 7, 2016 at 6:27 PM, Carl Eugen Hoyos <ceffmpeg at gmail.com>
wrote:
> >> 2016-11-08 3:15 GMT+01:00 Joel Lopez <badassmexican at gmail.com>:
> >>> Hi,
> >>>
> >>> I'm trying to figure out how to encode with ffmpeg instead of Elastic
> >>> Transcoder.  I wrote a bash script that outputs these commands and
> >>> encodes 6 files different bitrates.  After the files are done I
> >>> segment them with ffmpeg and upload them and the .m3u8 files up to
> >>> Amazon S3.  Once they're up I check the stream using Apple's Media
> >>> Stream Validator and I get the errors below the commands.  What am I
> >>> missing in my commands to cap the bit rates?
> >>
> >> Where in your commands are you trying to cap the bitrates?
> >>
> >>> ffmpeg version 2.6.git
> >>
> >> Please understand that this is completely outdated and not supported.
> >>
> >> Carl Eugen
> >> _______________________________________________
> >> ffmpeg-user mailing list
> >> ffmpeg-user at ffmpeg.org
> >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> >>
> >> To unsubscribe, visit link above, or email
> >> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".
> >
> >
> >
> > Hi Carl,
> >
> > I have updated my ffmpeg installation.  I have added -b:v -maxrate and
> > -bufsize to try and cap my bit rate.  I seem to be only about 16% -
> > 22% off the bit rates I'm expecting.  I imagine the container or
> > metadata adds some.  Is there anyway to further cap, calculate how
> > much more or use ffmpeg to extract the data when it's done encoding
> > and segmenting?
> >
> > For example a 2350k video bit rate and a 64k audio gives me 2878.02
> > kb/s measured when I expect 2414 kb/s.
> >
> >
> > Error: Measured peak bitrate compared to master playlist declared
> > value exceeds error tolerance
> > --> Detail:  Measured: 1347.74 kb/s, Master playlist: 1114.00 kb/s,
> > Error: 17.34%
> > --> Compare: INT_AP_01_001_1050.m3u8
> >
> > --> Detail:  Measured: 519.86 kb/s, Master playlist: 414.00 kb/s,
Error: 20.36%
> > --> Compare: INT_AP_01_001_350.m3u8
> >
> > --> Detail:  Measured: 386.14 kb/s, Master playlist: 299.00 kb/s,
Error: 22.57%
> > --> Compare: INT_AP_01_001_235.m3u8
> >
> > --> Detail:  Measured: 2878.02 kb/s, Master playlist: 2414.00 kb/s,
> > Error: 16.12%
> > --> Compare: INT_AP_01_001_2350.m3u8
> >
> > --> Detail:  Measured: 810.60 kb/s, Master playlist: 664.00 kb/s,
Error: 18.09%
> > --> Compare: INT_AP_01_001_600.m3u8
> >
> > --> Detail:  Measured: 2180.12 kb/s, Master playlist: 1814.00 kb/s,
> > Error: 16.79%
> > --> Compare: INT_AP_01_001_1750.m3u8
> >
> >
> > Here's my command and output for the 2350k video bitrate.  I do the
> > same command just change the bitrate for a 235k, 350k, 600k, 1050k and
> > a 1750k.
> >
> >
> > ffmpeg -y -t 60 -i INT_AP_01_001.mov -vf scale=1280:-2
> > -force_key_frames 'expr:gte(t,n_forced*2)' -c:v libx264 -preset medium
> > -profile:v baseline -level 3.0 -movflags +faststart -b:v 2350k
> > -maxrate 2350k -bufsize 2350k -g 60 -strict -2 -c:a aac -b:a 64k
> > -hls_list_size 0 INT_AP_01_001_2350.m3u8
> >
> >
> >
> >
> > ffmpeg version N-82299-g0a24587 Copyright (c) 2000-2016 the FFmpeg
developers
> >   built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
> >   configuration: --prefix=/home/joel/ffmpeg_build
> > --pkg-config-flags=--static
> > --extra-cflags=-I/home/joel/ffmpeg_build/include
> > --extra-ldflags=-L/home/joel/ffmpeg_build/lib --bindir=/home/joel/bin
> > --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype
> > --enable-libmp3lame --enable-libopus --enable-libtheora
> > --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
> > --enable-nonfree
> >   libavutil      55. 35.100 / 55. 35.100
> >   libavcodec     57. 66.101 / 57. 66.101
> >   libavformat    57. 57.100 / 57. 57.100
> >   libavdevice    57.  2.100 / 57.  2.100
> >   libavfilter     6. 66.100 /  6. 66.100
> >   libswscale      4.  3.100 /  4.  3.100
> >   libswresample   2.  4.100 /  2.  4.100
> >   libpostproc    54.  2.100 / 54.  2.100
> > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'INT_AP_01_001.mov':
> >   Metadata:
> >     creation_time   : 2016-08-29T23:57:33.000000Z
> >   Duration: 00:04:01.81, start: 0.000000, bitrate: 8256 kb/s
> >     Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661),
> > yuv420p(tv, smpte170m/smpte170m/bt709, progressive), 1280x720 [SAR 1:1
> > DAR 16:9], 7997 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 29.97 tbc
> > (default)
> >     Metadata:
> >       creation_time   : 2016-08-29T23:57:33.000000Z
> >       handler_name    : Apple Alias Data Handler
> >       encoder         : H264
> >     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz,
> > stereo, fltp, 255 kb/s (default)
> >     Metadata:
> >       creation_time   : 2016-08-29T23:57:33.000000Z
> >       handler_name    : Apple Alias Data Handler
> > [libx264 @ 0x26a0020] using SAR=1/1
> > [libx264 @ 0x26a0020] frame MB size (80x45) > level limit (1620)
> > [libx264 @ 0x26a0020] MB rate (107892) > level limit (40500)
> > [libx264 @ 0x26a0020] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.1 Cache64
> > [libx264 @ 0x26a0020] profile Constrained Baseline, level 3.0
> > Output #0, hls, to
> >
'/home/joel/Videos/encoded_hls/INT_AP_01_001_hls10/INT_AP_01_001_2350.m3u8':
> >   Metadata:
> >     encoder         : Lavf57.57.100
> >     Stream #0:0(eng): Video: h264 (libx264), yuv420p, 1280x720 [SAR
> > 1:1 DAR 16:9], q=-1--1, 2350 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
> > (default)
> >     Metadata:
> >       creation_time   : 2016-08-29T23:57:33.000000Z
> >       handler_name    : Apple Alias Data Handler
> >       encoder         : Lavc57.66.101 libx264
> >     Side data:
> >       cpb: bitrate max/min/avg: 2350000/0/2350000 buffer size: 2350000
> > vbv_delay: -1
> >     Stream #0:1(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 64 kb/s
(default)
> >     Metadata:
> >       creation_time   : 2016-08-29T23:57:33.000000Z
> >       handler_name    : Apple Alias Data Handler
> >       encoder         : Lavc57.66.101 aac
> > Stream mapping:
> >   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
> >   Stream #0:1 -> #0:1 (aac (native) -> aac (native))
> > Press [q] to stop, [?] for help
> > frame=   60 fps=0.0 q=7.0 size=N/A time=00:00:01.02 bitrate=N/A
speed=2.01x
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> > speed=0.847x
> > frame= 1546 fps= 25 q=28.0 size=N/A time=00:00:51.15 bitrate=N/A
> > speed=0.839x
> > frame= 1558 fps= 25 q=32.0 size=N/A time=00:00:52.19 bitrate=N/A
> > speed=0.849x
> > frame= 1571 fps= 25 q=33.0 size=N/A time=00:00:52.19 bitrate=N/A
> > speed=0.841x
> > frame= 1583 fps= 25 q=32.0 size=N/A time=00:00:53.24 bitrate=N/A
> > speed=0.851x
> > frame= 1597 fps= 25 q=29.0 size=N/A time=00:00:53.24 bitrate=N/A
> > speed=0.844x
> > frame= 1607 fps= 25 q=30.0 size=N/A time=00:00:53.24 bitrate=N/A
> > speed=0.837x
> > frame= 1619 fps= 25 q=30.0 size=N/A time=00:00:54.28 bitrate=N/A
> > speed=0.847x
> > frame= 1632 fps= 25 q=29.0 size=N/A time=00:00:54.28 bitrate=N/A
speed=0.84x
> > frame= 1644 fps= 25 q=29.0 size=N/A time=00:00:55.33 bitrate=N/A
> > speed=0.849x
> > frame= 1657 fps= 25 q=30.0 size=N/A time=00:00:55.33 bitrate=N/A
> > speed=0.842x
> > frame= 1668 fps= 25 q=30.0 size=N/A time=00:00:55.33 bitrate=N/A
> > speed=0.835x
> > frame= 1680 fps= 25 q=30.0 size=N/A time=00:00:56.37 bitrate=N/A
> > speed=0.844x
> > frame= 1693 fps= 25 q=30.0 size=N/A time=00:00:56.37 bitrate=N/A
> > speed=0.838x
> > frame= 1706 fps= 25 q=29.0 size=N/A time=00:00:57.42 bitrate=N/A
> > speed=0.847x
> > frame= 1719 fps= 25 q=29.0 size=N/A time=00:00:57.42 bitrate=N/A
speed=0.84x
> > frame= 1730 fps= 25 q=30.0 size=N/A time=00:00:57.42 bitrate=N/A
> > speed=0.834x
> > frame= 1742 fps= 25 q=29.0 size=N/A time=00:00:58.46 bitrate=N/A
> > speed=0.843x
> > frame= 1755 fps= 25 q=29.0 size=N/A time=00:00:58.46 bitrate=N/A
> > speed=0.837x
> > frame= 1769 fps= 25 q=29.0 size=N/A time=00:00:59.51 bitrate=N/A
> > speed=0.845x
> > frame= 1783 fps= 25 q=29.0 size=N/A time=00:00:59.51 bitrate=N/A
> > speed=0.838x
> > frame= 1796 fps= 25 q=29.0 size=N/A time=00:00:59.53 bitrate=N/A
> > speed=0.832x
> > frame= 1799 fps= 25 q=-1.0 Lsize=N/A time=00:01:00.00 bitrate=N/A
> > speed=0.819x
> > video:16711kB audio:476kB subtitle:0kB other streams:0kB global
> > headers:0kB muxing overhead: unknown
> > [libx264 @ 0x26a0020] frame I:59    Avg QP:17.77  size: 31324
> > [libx264 @ 0x26a0020] frame P:1740  Avg QP:22.89  size:  8773
> > [libx264 @ 0x26a0020] mb I  I16..4: 61.5%  0.0% 38.5%
> > [libx264 @ 0x26a0020] mb P  I16..4: 11.2%  0.0%  1.7%  P16..4: 37.0%
> > 6.9%  1.7%  0.0%  0.0%    skip:41.5%
> > [libx264 @ 0x26a0020] coded y,uvDC,uvAC intra: 17.8% 60.8% 10.8%
> > inter: 6.4% 29.8% 0.3%
> > [libx264 @ 0x26a0020] i16 v,h,dc,p: 42% 28% 13% 17%
> > [libx264 @ 0x26a0020] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 29% 22%  5%
> > 5%  4%  5%  4%  3%
> > [libx264 @ 0x26a0020] i8c dc,h,v,p: 52% 23% 21%  4%
> > [libx264 @ 0x26a0020] ref P L0: 75.1% 24.9%
> > [libx264 @ 0x26a0020] kb/s:2280.63
> > [aac @ 0x26a4500] Qavg: 529.314
>
>
> I'm just trying to figure out how to make my master m3u8 playlist file
> with the correct bitrates for each encode.  Hopefully I can use ffmpeg
> to extract the info or just calculate it.
>
> Thanks.

Am I going at this wrong?  Should I rephase and repost it?


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