[FFmpeg-user] Setting the "profile compatibility" value
Jim Kang
jim_kang at harvard.edu
Wed Oct 28 04:43:34 CET 2015
Hi. I'm trying to transcode a file for use in an streaming HTML 5 context.
I want to feed bits of video to a SourceBuffer in a MediaSource, as in this
example:
https://github.com/nickdesaulniers/netfix/blob/gh-pages/demo/bufferAll.html
The problem is I need my video to be encoded such that it conforms to the
MIME codec string 'video/mp4; codecs="avc1.*42E01E*, mp4a.40.2"'. To break
that down:
avc1 = H264
42 = "profile_indication"
E0 = "profile compatibility"
1E = "level indication"
(The MIME codec string format is explained in
http://tools.ietf.org/html/rfc6381and this Stack Overflow answer:
http://stackoverflow.com/questions/16363167/html5-video-tag-codecs-attribute
)
This is the ffmpeg command I'm using (on a Mac):
ffmpeg \
-i data/baseline3_test.mp4 \ -c:v libx264 \ -c:a libvo_aacenc \ -profile:v
baseline \ -level:v 3.0 \ -r 25 \ -keyint_min 250 \ -strict experimental \
-b:a 96k \ -movflags faststart \ data/baseline3_test_encoded.mp4
The ffmpeg output is at the bottom of the email.
The resulting file has the correct "profile indication":
mp4file --dump data/baseline3_test_encoded.mp4 | grep
AVCProfileIndication
"data/baseline3_test_encoded.mp4": AVCProfileIndication = 66 (0x
*42*)
And the correct "level indication":
mp4file --dump data/baseline3_test_encoded.mp4 | grep AVCLevelIndication
"data/baseline3_test_encoded.mp4": AVCLevelIndication = 30 (0x*1e*)
But unsurprisingly since I did nothing to set it, the profile compatibility
is not what I want:
mp4file --dump data/baseline3_test_encoded.mp4 | grep
profile_compatibility
"data/baseline3_test_encoded.mp4": profile_compatibility = 192 (0x
*c0*)
(I'm using mp4file from https://code.google.com/p/mp4v2/wiki/BuildSource to
extract these values because I do know how to get them via ffprobe.)
I want that *c0* to be an *e0*. How can I set that?
Jim
--
The ffmpeg output for my command:
ffmpeg version 2.7.1 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 7.0.0 (clang-700.1.76)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.7.1 --enable-shared
--enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables
--enable-avresample --cc=clang --host-cflags= --host-ldflags=
--enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid
--enable-libfaac --enable-nonfree --enable-vda
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'data/baseline3_test.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : SDI-A Record
encoder : Lavf55.48.100
comment : SDI-A Record:video|SDI-A Record:audio|SDI-B
Record:video|SDI-B Record:audio
Duration: 00:03:13.35, start: 0.000000, bitrate: 2219 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 /
0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2043 kb/s, 30 fps, 30
tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono,
fltp, 96 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(und): Data: none (rtp / 0x20707472), 68 kb/s (default)
Metadata:
creation_time : 2015-10-26 18:35:00
handler_name : GPAC ISO Hint Handler
Stream #0:3(und): Data: none (rtp / 0x20707472), 7 kb/s (default)
Metadata:
creation_time : 2015-10-26 18:35:00
handler_name : GPAC ISO Hint Handler
[libx264 @ 0x7ff3c101a600] using SAR=1/1
[libx264 @ 0x7ff3c101a600] frame MB size (80x45) > level limit (1620)
[libx264 @ 0x7ff3c101a600] MB rate (90000) > level limit (40500)
[libx264 @ 0x7ff3c101a600] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7ff3c101a600] profile Constrained Baseline, level 3.0
[libx264 @ 0x7ff3c101a600] 264 - core 144 r2533 c8a773e - H.264/MPEG-4 AVC
codec - Copyleft 2003-2015 -http://www.videolan.org/x264.html - options:
cabac=0 ref=2 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1
psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6
lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0
bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250
keyint_min=126 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1
crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'data/baseline3_test_encoded.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : SDI-A Record
comment : SDI-A Record:video|SDI-A Record:audio|SDI-B
Record:video|SDI-B Record:audio
encoder : Lavf56.36.100
Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021),
yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
(default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.41.100 libx264
Stream #0:1(und): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040),
44100 Hz, mono, s16, 96 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc56.41.100 libvo_aacenc
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
Press [q] to stop, [?] for help
Past duration 0.666664 too large
Past duration 0.833321 too large
Past duration 0.999992 too large
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q=28.0 size= 37294kB time=00:02:42.27 bitrate=1882.7kbitsframe= 4081 fps=
51 q=28.0 size= 37498kB time=00:02:43.64 bitrate=1877.2kbitsframe= 4103
fps= 51 q=28.0 size= 37699kB time=00:02:44.56 bitrate=1876.6kbitsframe=
4127 fps= 51 q=28.0 size= 37901kB time=00:02:45.49
bitrate=1876.0kbitsframe= 4152 fps= 51 q=28.0 size= 38173kB
time=00:02:46.35 bitrate=1879.7kbitsframe= 4178 fps= 51 q=28.0 size=
38442kB time=00:02:47.24 bitrate=1883.0kbitsframe= 4207 fps= 51 q=28.0
size= 38715kB time=00:02:48.58 bitrate=1881.3kbitsframe= 4231 fps= 51
q=28.0 size= 38917kB time=00:02:49.46 bitrate=1881.2kbitsframe= 4262 fps=
51 q=28.0 size= 39166kB time=00:02:50.86 bitrate=1877.8kbitsframe= 4291
fps= 51 q=28.0 size= 39366kB time=00:02:51.76 bitrate=1877.4kbitsframe=
4315 fps= 51 q=28.0 size= 39547kB time=00:02:52.72
bitrate=1875.7kbitsframe= 4345 fps= 51 q=28.0 size= 39815kB
time=00:02:54.02 bitrate=1874.3kbitsframe= 4367 fps= 51 q=28.0 size=
40017kB time=00:02:54.97 bitrate=1873.5kbitsframe= 4392 fps= 51 q=28.0
size= 40247kB time=00:02:55.90 bitrate=1874.4kbitsframe= 4418 fps= 51
q=28.0 size= 40457kB time=00:02:56.80 bitrate=1874.5kbitsframe= 4442 fps=
51 q=28.0 size= 40699kB time=00:02:57.73 bitrate=1875.9kbitsframe= 4468
fps= 51 q=28.0 size= 40939kB time=00:02:59.10 bitrate=1872.5kbitsframe=
4492 fps= 51 q=28.0 size= 41194kB time=00:02:59.98
bitrate=1874.9kbitsframe= 4515 fps= 51 q=28.0 size= 41392kB
time=00:03:00.94 bitrate=1874.0kbitsframe= 4542 fps= 51 q=28.0 size=
41626kB time=00:03:01.82 bitrate=1875.5kbitsframe= 4567 fps= 51 q=28.0
size= 41860kB time=00:03:03.09 bitrate=1872.8kbitsframe= 4592 fps= 51
q=28.0 size= 42110kB time=00:03:04.00 bitrate=1874.7kbitsframe= 4617 fps=
51 q=28.0 size= 42381kB time=00:03:04.93 bitrate=1877.3kbitsframe= 4640
fps= 51 q=28.0 size= 42604kB time=00:03:05.83 bitrate=1878.0kbitsframe=
4661 fps= 51 q=28.0 size= 42809kB time=00:03:06.72
bitrate=1878.1kbitsframe= 4680 fps= 51 q=28.0 size= 42981kB
time=00:03:07.60 bitrate=1876.8kbitsframe= 4700 fps= 50 q=28.0 size=
43176kB time=00:03:08.06 bitrate=1880.7kbitsframe= 4717 fps= 50 q=28.0
size= 43317kB time=00:03:08.99 bitrate=1877.5kbitsframe= 4741 fps= 50
q=28.0 size= 43522kB time=00:03:09.90 bitrate=1877.4kbitsframe= 4758 fps=
50 q=28.0 size= 43654kB time=00:03:10.36 bitrate=1878.5kbitsframe= 4782
fps= 50 q=28.0 size= 43829kB time=00:03:11.73 bitrate=1872.6kbitsframe=
4810 fps= 50 q=28.0 size= 44031kB time=00:03:12.66
bitrate=1872.2kbitsframe= 4831 fps= 50 q=28.0 size= 44197kB
time=00:03:13.26 bitrate=1873.3kbits[mp4 @ 0x7ff3c1019a00] Starting second
pass: moving the moov atom to the beginning of the file
frame= 4833 fps= 50 q=-1.0 Lsize= 44869kB time=00:03:13.32
bitrate=1901.3kbits/s dup=0 drop=965
video:42481kB audio:2266kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: 0.272826%
[libx264 @ 0x7ff3c101a600] frame I:29 Avg QP:18.10 size: 29160
[libx264 @ 0x7ff3c101a600] frame P:4804 Avg QP:21.10 size: 8879
[libx264 @ 0x7ff3c101a600] mb I I16..4: 74.9% 0.0% 25.1%
[libx264 @ 0x7ff3c101a600] mb P I16..4: 16.0% 0.0% 0.9% P16..4: 45.0%
5.4% 1.2% 0.0% 0.0% skip:31.5%
[libx264 @ 0x7ff3c101a600] coded y,uvDC,uvAC intra: 5.0% 71.3% 11.5% inter:
3.8% 35.6% 0.8%
[libx264 @ 0x7ff3c101a600] i16 v,h,dc,p: 39% 35% 13% 13%
[libx264 @ 0x7ff3c101a600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 27% 27% 2%
3% 3% 3% 2% 2%
[libx264 @ 0x7ff3c101a600] i8c dc,h,v,p: 56% 22% 20% 2%
[libx264 @ 0x7ff3c101a600] ref P L0: 73.7%
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