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  • FFmpeg - mapping 4 audio channels to 1 audio track

    18 juillet 2016, par Avalon

    I have two QT MOV’s that I want to concatenate using FFmpeg, but I am having trouble understanding how to map the audio channels.

    First MOV has 2 channels, Front Left and Front Right. Second MOV has 4 channels, Front Left, Front Right, Side Left and Side Right.

    How do I create 1 audio track with 4 channels mapped as FL, FR, SL and SR ?

    MediaInfo reports the following (not desired result) :

    Audio #1
    
ID                                       : 2
    
Format                                   : AAC
    
Format/Info                              : Advanced Audio Codec
    
Format profile                           : LC
    
Codec ID                                 : 40
    
Duration                                 : 4mn 35s
    
Bit rate mode                            : Variable
    
Bit rate                                 : 126 Kbps
    
Maximum bit rate                         : 160 Kbps
    
Channel(s)                               : 2 channels
    
Channel(s)_Original                      : 4 channels
    
Channel positions                        : Front: L C R, Side: C
    
Sampling rate                            : 48.0 KHz
    
Frame rate                               : 46.875 fps (1024 spf)
    
Compression mode                         : Lossy
    
Stream size                              : 4.14 MiB (12%)
    
Default                                  : Yes
    
Alternate group                          : 1
    

    
Audio #2
    
ID                                       : 3
    
Format                                   : AAC
    
Format/Info                              : Advanced Audio Codec
    
Format profile                           : LC
    
Codec ID                                 : 40
    
Duration                                 : 4mn 35s
    
Bit rate mode                            : Variable
    
Bit rate                                 : 127 Kbps
    
Maximum bit rate                         : 160 Kbps
    
Channel(s)                               : 2 channels
    
Channel(s)_Original                      : 4 channels
    
Channel positions                        : Front: L C R, Side: C
    
Sampling rate                            : 48.0 KHz
    
Frame rate                               : 46.875 fps (1024 spf)
    
Compression mode                         : Lossy
    
Stream size                              : 4.18 MiB (12%)
    
Default                                  : No
    
Alternate group                          : 1
    

    
Audio #3
    
ID                                       : 4
    
Format                                   : AAC
    
Format/Info                              : Advanced Audio Codec
    
Format profile                           : LC
    
Codec ID                                 : 40
    
Duration                                 : 4mn 35s
    
Bit rate mode                            : Variable
    
Bit rate                                 : 110 Kbps
    
Maximum bit rate                         : 160 Kbps
    
Channel(s)                               : 2 channels
    
Channel(s)_Original                      : 4 channels
    
Channel positions                        : Front: L C R, Side: C
    
Sampling rate                            : 48.0 KHz
    
Frame rate                               : 46.875 fps (1024 spf)
    
Compression mode                         : Lossy
    
Stream size                              : 3.62 MiB (10%)
    
Default                                  : No
    
Alternate group                          : 1
    

    
Audio #4
    
ID                                       : 5
    
Format                                   : AAC
    
Format/Info                              : Advanced Audio Codec
    
Format profile                           : LC
    
Codec ID                                 : 40
    
Duration                                 : 4mn 35s
    
Bit rate mode                            : Variable
    
Bit rate                                 : 110 Kbps
    
Maximum bit rate                         : 160 Kbps
    
Channel(s)                               : 2 channels
    
Channel(s)_Original                      : 4 channels
    
Channel positions                        : Front: L C R, Side: C
    
Sampling rate                            : 48.0 KHz
    
Frame rate                               : 46.875 fps (1024 spf)
    
Compression mode                         : Lossy
    
Stream size                              : 3.61 MiB (10%)
    
Default                                  : No
    
Alternate group                          : 1

    FFmpeg command is as follows :

    `ffmpeg -i "2chan.mov" -i "4chan.mov" -filter_complex "[0:v] [0:a] [1:v] [1:a] concat=n=2:v=1:a=1 [v] [a]; [v]scale=-1:288[v2]; [a]channelsplit=channel_layout=quad(side)[FL][FR][SL][SR]" -map "[v2]" -map "[FL]" -map "[FR]" -map "[SL]" -map "[SR]" -c:v libx264 -pix_fmt yuv420p -b:v 700k -minrate 700k -maxrate 700k -bufsize 700k -r 25 -sc_threshold 25 -keyint_min 25 -g 25 -qmin 3 -qmax 51 -threads 8 -c:a aac -strict -2 -b:a 160k -ar 48000 -async 1 -ac 4 combined.mp4`

    Console output :

      ffmpeg version N-77883-gd7c75a5 Copyright (c) 2000-2016 the FFmpeg developers
    
      built with gcc 5.2.0 (GCC)
    
      configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
    
    isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
    
    le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
    
    enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
    
    ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
    
    le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
    
    able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
    
    ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
    
     --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
    
    e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --
    
    enable-lzma --enable-decklink --enable-zlib
    
      libavutil      55. 13.100 / 55. 13.100
    
      libavcodec     57. 22.100 / 57. 22.100
    
      libavformat    57. 21.101 / 57. 21.101
    
      libavdevice    57.  0.100 / 57.  0.100
    
      libavfilter     6. 25.100 /  6. 25.100
    
      libswscale      4.  0.100 /  4.  0.100
    
      libswresample   2.  0.101 /  2.  0.101
    
      libpostproc    54.  0.100 / 54.  0.100
    
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000575c00] ignoring 'frma' atom of 'mp4a', str
    
eam format is 'mp4a'
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2chan.mov':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 537199360
    
    compatible_brands: qt
    
    creation_time   : 2016-01-19 05:48:38
    
  Duration: 00:00:45.00, start: 0.000000, bitrate: 364 kb/s
    
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte1
    
70m/smpte170m/bt709), 768x576, 196 kb/s, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 25 tbn
    
, 50 tbc (default)
    
    Metadata:
    
      creation_time   : 2016-01-19 05:48:40
    
      handler_name    : Apple Alias Data Handler
    
      encoder         : H.264
    
      timecode        : 00:00:00:00
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, flt
    
p, 159 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-01-19 05:48:42
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2016-01-19 05:49:42
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005da420] ignoring 'frma' atom of 'mp4a', str
    
eam format is 'mp4a'
    
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '4chan.mov':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 537199360
    
    compatible_brands: qt
    
    creation_time   : 2016-01-19 04:11:52
    
  Duration: 00:19:58.00, start: 0.000000, bitrate: 5118 kb/s
    
    Stream #1:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte1
    
70m/smpte170m/bt709), 768x576, 4955 kb/s, 25 fps, 25 tbr, 25k tbn, 50k tbc (defa
    
ult)
    
    Metadata:
    
      creation_time   : 2016-01-19 04:11:52
    
      handler_name    : Apple Alias Data Handler
    
      encoder         : H.264
    
      timecode        : 00:28:33:21
    
    Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, quad, fltp,
    
 157 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-01-19 04:11:52
    
      handler_name    : Apple Alias Data Handler
    
    Stream #1:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
    
    Metadata:
    
      rotate          : 0
    
      creation_time   : 2016-01-19 04:11:52
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:28:33:21
    
File 'Output_Complex_6.mp4' already exists. Overwrite ? [y/N] y
    
-async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.
    
100000:first_pts=0.
    
    Last message repeated 1 times
    
[libx264 @ 000000000057d260] using SAR=1/1
    
[libx264 @ 000000000057d260] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
    
 SlowShuffle
    
[libx264 @ 000000000057d260] profile High, level 2.1
    
[libx264 @ 000000000057d260] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC cod
    
ec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 r
    
ef=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed
    
_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pski
    
p=1 chroma_qp_offset=-2 threads=8 lookahead_threads=1 sliced_threads=0 nr=0 deci
    
mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_
    
adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=25 keyint_min=13
    
 scenecut=25 intra_refresh=0 rc_lookahead=25 rc=cbr mbtree=1 bitrate=700 ratetol
    
=1.0 qcomp=0.60 qpmin=3 qpmax=51 qpstep=4 vbv_maxrate=700 vbv_bufsize=700 nal_hr
    
d=none filler=0 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'Output_Complex_6.mp4':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 537199360
    
    compatible_brands: qt
    
    title           : TestTitle
    
    encoder         : Lavf57.21.101
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 384x28
    
8 [SAR 1:1 DAR 4:3], q=3-51, 700 kb/s, 25 fps, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      encoder         : Lavc57.22.100 libx264
    
    Side data:
    
      unknown side data type 10 (24 bytes)
    
    Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, 4.0, fltp,
    
160 kb/s
    
    Metadata:
    
      encoder         : Lavc57.22.100 aac
    
    Stream #0:2: Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, 4.0, fltp,
    
160 kb/s
    
    Metadata:
    
      encoder         : Lavc57.22.100 aac
    
    Stream #0:3: Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, 4.0, fltp,
    
160 kb/s
    
    Metadata:
    
      encoder         : Lavc57.22.100 aac
    
    Stream #0:4: Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, 4.0, fltp,
    
160 kb/s
    
    Metadata:
    
      encoder         : Lavc57.22.100 aac
    
Stream mapping:
    
  Stream #0:0 (h264) -> concat:in0:v0
    
  Stream #0:1 (aac) -> concat:in0:a0
    
  Stream #1:0 (h264) -> concat:in1:v0
    
  Stream #1:1 (aac) -> concat:in1:a0
    
  scale -> Stream #0:0 (libx264)
    
  channelsplit:FL -> Stream #0:1 (aac)
    
  channelsplit:FR -> Stream #0:2 (aac)
    
  channelsplit:SL -> Stream #0:3 (aac)
    
  channelsplit:SR -> Stream #0:4 (aac)
    
Press [q] to stop, [?] for help
    
frame=   85 fps=0.0 q=3.0 size=       6kB time=00:00:02.68 bitrate=  18.8kbits/s
    
frame=  150 fps=148 q=3.0 size=      14kB time=00:00:05.24 bitrate=  21.3kbits/s
    
frame=  198 fps=130 q=3.0 size=      65kB time=00:00:07.21 bitrate=  74.4kbits/s
    
frame=  238 fps=118 q=3.0 size=     125kB time=00:00:08.78 bitrate= 116.2kbits/s
    
frame=  271 fps=108 q=3.0 size=     171kB time=00:00:10.09 bitrate= 138.9kbits/s
    
frame=  304 fps=100 q=3.0 size=     218kB time=00:00:11.45 bitrate= 156.0kbits/s
    
frame=  339 fps= 96 q=3.0 size=     268kB time=00:00:12.84 bitrate= 171.0kbits/s
    
frame=  372 fps= 93 q=-1.0 Lsize=     376kB time=00:00:14.80 bitrate= 208.0kbits
    
/s speed=3.69x
    
video:27kB audio:319kB subtitle:0kB other streams:0kB global headers:0kB muxing
    
overhead: 8.551113%
    
[libx264 @ 000000000057d260] frame I:15    Avg QP: 3.01  size:  1370
    
[libx264 @ 000000000057d260] frame P:90    Avg QP: 3.00  size:    24
    
[libx264 @ 000000000057d260] frame B:267   Avg QP: 3.00  size:    17
    
[libx264 @ 000000000057d260] consecutive B-frames:  4.3%  0.0%  0.0% 95.7%
    
[libx264 @ 000000000057d260] mb I  I16..4: 95.8%  0.0%  4.2%
    
[libx264 @ 000000000057d260] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.1%  0.0
    
%  0.0%  0.0%  0.0%    skip:99.9%
    
[libx264 @ 000000000057d260] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.0%  0.0
    
%  0.0%  direct: 0.0%  skip:100.0%  L0: 0.0% L1:100.0% BI: 0.0%
    
[libx264 @ 000000000057d260] 8x8 transform intra:0.0% inter:50.0%
    
[libx264 @ 000000000057d260] coded y,uvDC,uvAC intra: 3.1% 8.8% 8.2% inter: 0.0%
    
 0.0% 0.0%
    
[libx264 @ 000000000057d260] i16 v,h,dc,p: 90%  5%  5%  0%
    
[libx264 @ 000000000057d260] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 46% 29% 23%  0%  0%
    
 0%  0%  0%  0%
    
[libx264 @ 000000000057d260] i8c dc,h,v,p: 76%  7% 17%  0%
    
[libx264 @ 000000000057d260] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 000000000057d260] kb/s:14.64
    
[aac @ 0000000000578320] Qavg: 65394.652
    
[aac @ 0000000000593020] Qavg: 65473.359
    
[aac @ 0000000000593940] Qavg: 65536.000
    
[aac @ 0000000000594260] Qavg: 65536.000
    
Exiting normally, received signal 2.
    
Terminate batch job (Y/N)? Y

  • vlc 2.1.5 cannot find libavutil under ffmpeg

    22 février 2015, par micr0sub

    The distro I’m using (CentOS 6.6) doesn’t have a high enough version of VLC in yum that I’ve found (>=2.1.0) for the project I’m working on, so I’m trying to build it from source. After finding out that the version of ffmpeg in the repositories is also not high enough (see https://www.bountysource.com/issues/173789-build-process-is-busted-in-vdpau) I’ve built ffmpeg from source as well. Now that’s finished, I get :

    usr@host$: ffmpeg
    
    ffmpeg version N-70054-g7a459be Copyright (c) 2000-2015 the FFmpeg developers
    
      built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)
    
      configuration: 
    
      libavutil      54. 19.100 / 54. 19.100
    
      libavcodec     56. 25.100 / 56. 25.100
    
      libavformat    56. 23.100 / 56. 23.100
    
      libavdevice    56.  4.100 / 56.  4.100
    
      libavfilter     5. 11.100 /  5. 11.100
    
      libswscale      3.  1.101 /  3.  1.101
    
      libswresample   1.  1.100 /  1.  1.100

    However, when I run ./configure under VLC I get the following message :

    No package 'libavutil' found. Pass --disable-avcodec to ignore this error.

    Does anyone know why this is happening ?

    Thanks.

  • Begin stream simple mp4 with ffserver

    19 février 2015, par Ara Deonas

    I want to stream a mp4 and for this I read about ffserver.
    So I search and read ffserver documentations but still cant stream a simple file.
    For this I done these :
    1-A win 8 and last VLC installed.
    2-A Ubuntu 13 with last ffmpeg package.
    3-A ffserver.conf file saved to /etc/ and copied from http://ffmpeg.org/sample.html (I just copy text in a new file).
    4-Run this command : ffserver -f /etc/ffconfig.conf and this is result :

    avserver version 0.8.13-6:0.8.13-0ubuntu0.13.10.1, Copyright (c) 2000-2014 the Libav developers
    
  built on Jul 15 2014 13:53:49 with gcc 4.8.1
    
Tue Feb 10 07:29:07 2015 AVserver started.

    5-Check http://localhost:8090/stat.html and server status is OK.It shows me 4 stream : test1.mpg,test.asf,stat.html,index.html.
    6-Run this command : ffmpeg -i test.mp4 http://localhost:8090/feed1.ffm and this is result :

    ffmpeg version 0.8.13-6:0.8.13-0ubuntu0.13.10.1, Copyright (c) 2000-2014 the Libav developers
    
  built on Jul 15 2014 13:53:49 with gcc 4.8.1
    
*** THIS PROGRAM IS DEPRECATED ***
    
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'big.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 1
    
    compatible_brands: isom
    
    creation_time   : 2015-02-05 20:35:09
    
  Duration: 00:21:36.12, start: 0.000000, bitrate: 788 kb/s
    
    Stream #0.0(und): Video: h264 (High), yuv420p, 720x404, 677 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
    
    Metadata:
    
      creation_time   : 2015-02-05 17:05:45
    
    Stream #0.1(und): Audio: aac, 48000 Hz, stereo, s16, 106 kb/s
    
    Metadata:
    
      creation_time   : 2015-02-05 20:35:12
    
Incompatible sample format '(null)' for codec 'mp2', auto-selecting format 's16'
    
    Last message repeated 1 times
    
Incompatible sample format '(null)' for codec 'libmp3lame', auto-selecting format 's16'
    
[buffer @ 0x900f0c0] w:720 h:404 pixfmt:yuv420p
    
[scale @ 0x8ea5080] w:720 h:404 fmt:yuv420p -> w:160 h:128 fmt:yuv420p flags:0x4
    
[buffer @ 0x8ea34a0] Invalid pixel format string '-1'
    
Error opening filters!

    7-I look at error and I can not find why this happen and where I go wrong !

    Until now I read many sample and tutorials about ffserver but most of them is about live streaming but I just want to stream some mp4 files.

    EDIT :

    I installed real ffmpeg like this link : http://askubuntu.com/questions/373322/how-to-replace-avconv-with-the-real-ffmpeg-and-have-it-work-right but same error (Just change ppa to ppa:mc3man/trusty-media for last release) :

    pp@ubuntu:~$ ffmpeg -i big.mp4 http://localhost:8090/feed1.ffm
    
ffmpeg version 0.8.13-6:0.8.13-0ubuntu0.13.10.1, Copyright (c) 2000-2014 the Libav developers
    
  built on Jul 15 2014 13:53:49 with gcc 4.8.1
    
*** THIS PROGRAM IS DEPRECATED ***
    
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'big.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 1
    
    compatible_brands: isom
    
    creation_time   : 2015-02-05 20:35:09
    
  Duration: 00:21:36.12, start: 0.000000, bitrate: 788 kb/s
    
    Stream #0.0(und): Video: h264 (High), yuv420p, 720x404, 677 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
    
    Metadata:
    
      creation_time   : 2015-02-05 17:05:45
    
    Stream #0.1(und): Audio: aac, 48000 Hz, stereo, s16, 106 kb/s
    
    Metadata:
    
      creation_time   : 2015-02-05 20:35:12
    
Incompatible sample format '(null)' for codec 'mp2', auto-selecting format 's16'
    
    Last message repeated 1 times
    
Incompatible sample format '(null)' for codec 'libmp3lame', auto-selecting format 's16'
    
[buffer @ 0xa04e0c0] w:720 h:404 pixfmt:yuv420p
    
[scale @ 0x9ee4080] w:720 h:404 fmt:yuv420p -> w:160 h:128 fmt:yuv420p flags:0x4
    
[buffer @ 0x9ee24a0] Invalid pixel format string '-1'
    
Error opening filters!

    Can any one give me exact commands that I should run for test ?
    (I know this is like beginners problem but I read doc and test everything as I can but still no luck)

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