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  • Configuration spécifique d’Apache

    4 février 2011, par

    Modules spécifiques
    Pour la configuration d’Apache, il est conseillé d’activer certains modules non spécifiques à MediaSPIP, mais permettant d’améliorer les performances : mod_deflate et mod_headers pour compresser automatiquement via Apache les pages. Cf ce tutoriel ; mode_expires pour gérer correctement l’expiration des hits. Cf ce tutoriel ;
    Il est également conseillé d’ajouter la prise en charge par apache du mime-type pour les fichiers WebM comme indiqué dans ce tutoriel.
    Création d’un (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

Sur d’autres sites (5550)

  • How to transcode to another video parameters ? [on hold]

    23 mai 2014, par user3668381

    Google, man pages and any docs I found didn t shown anything relevant so...

    I want to be able to concatene video with ffmpeg, this part is simple, but fail (freeze or massive frame dropping) if the videos don t have the same properties.

    But for now, I didn t found anything else but trying to set a lot of options, expecting to get the good properties... But when they aren t rounded down (or up), you just can t set them (tbr, tbn...).

    So my question is, is there any hidden option in ffmpeg to take the properties of another video (so -copy won t work) as the properties of the transcode.

    Illustration :

    This is the video from which I wan t to copy the parameters :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cdr.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    creation_time   : 2013-07-04 11:04:27
    
    encoder         : Lavf54.11.100
    
  Duration: 00:06:26.96, start: 0.000000, bitrate: 804 kb/s
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 1280:1281 DAR 16:9], 753 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc (default)
    
    Metadata:
    
      creation_time   : 2013-07-04 11:04:27
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 44 kb/s (default)
    
    Metadata:
    
      creation_time   : 2013-07-04 11:04:27
    
      handler_name    : SoundHandler
    
At least one output file must be specified

    For now, my command is ffmpeg -i video.mp4 -c:v h264 -c:a libfdk_aac -aspect 16:9 -b:v 753k -b:a 44k output.mp4

    But it turn out that output.mp4 reveal :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.21.100
    
  Duration: 00:00:07.11, start: 0.046440, bitrate: 685 kb/s
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 1280:1281 DAR 16:9], 637 kb/s, 15 fps, 15 tbr, 15360 tbn, 30 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 45 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
At least one output file must be specified

    As we can see, audio bitrate is rounded, tbn is off the chart, general bitrate isn t the same and on and on and on...

    Is there any better way but to add options again and again and hope that nothing will be rounded ? Something like ffmpeg -i video.mp4 -use_properties_of model.mp4 output.mp4 ?

  • WebM file not seekable in Chrome, when generated with ffmpeg

    11 avril 2014, par Zoon

    I am having a mind-boggling problem, I just can't seem to resolve.

    Providing a WebM file through PHP is nothing new in my world, and I even know how to work with HTTP 206 Partial Content. But for some reason Chrome does not like it.

    A simple HTML5 video playback

    <video width="640" height="360" poster="picture/preview/V00000006.jpg" controls="controls" preload="preload">
    
    <source type="video/webm" src="/video/V00000006.webm">
    
</source></video>

    where /video/V00000006.webm is rewritten to a PHP-file in Apache, will playback just fine.
    But in Chrome the seekbar is not effective. When clicking on the seekbar the player will freeze and no longer playback until page is refreshed. Firefox handles it just fine !

    If I change /video/V00000006.webm to be a direct link to the same video it works just fine. I even compared the network requests between the two versions (with and without PHP) and there is barely any difference in the first request, but the second is failing in the PHP-delivered video.

    Initial request and seek request for Apache-delivered video file :

        Request URL :http://mytestserver.net/movie1152x720.webm
    Request Method:GET
    Status Code:206 Partial Content
    Request Headers
    Accept :*/*
    Accept-Encoding:identity ;q=1, * ;q=0
    Accept-Language:da-DK,da ;q=0.8,en-US ;q=0.6,en ;q=0.4
    Cache-Control:no-cache
    Connection:keep-alive
    Cookie:PHPSESSID=i562540rek172mnv3nk528acj0 ; userPassword= ; userEmail=
    Host:mytestserver.net
    Pragma:no-cache
    Range:bytes=0-
    Referer :http://mytestserver.net/video.html
    User-Agent:Mozilla/5.0 (X11 ; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36
    Response Headers
    Accept-Ranges:bytes
    Connection:close
    Content-Length:4446451
    Content-Range:bytes 0-4446450/4446451
    Content-Type:video/webm
    Date:Fri, 11 Apr 2014 13:07:30 GMT
    ETag :"d2d0027-43d8f3-b91417c0"
    Last-Modified:Fri, 11 Apr 2014 12:46:31 GMT
    Server:Apache/2.2.3 (CentOS)

        —
    

        Request URL :http://mytestserver.net/movie1152x720.webm
    
    Request Method:GET
    
    Status Code:206 Partial Content
    
    Request Headers
    
    Accept :*/*
    
    Accept-Encoding:identity ;q=1, * ;q=0
    
    Accept-Language:da-DK,da ;q=0.8,en-US ;q=0.6,en ;q=0.4
    
    Cache-Control:no-cache
    
    Connection:keep-alive
    
    Cookie:PHPSESSID=i562540rek172mnv3nk528acj0 ; userPassword= ; userEmail=
    
    Host:mytestserver.net
    
    Pragma:no-cache
    
    Range:bytes=4445881-
    
    Referer :http://mytestserver.net/video.html
    
    User-Agent:Mozilla/5.0 (X11 ; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36
    
    Response Headers
    
    Accept-Ranges:bytes
    
    Connection:close
    
    Content-Length:570
    
    Content-Range:bytes 4445881-4446450/4446451
    
    Content-Type:video/webm
    
    Date:Fri, 11 Apr 2014 13:09:02 GMT
    
    ETag :"d2d0027-43d8f3-b91417c0"
    
    Last-Modified:Fri, 11 Apr 2014 12:46:31 GMT
    
    Server:Apache/2.2.3 (CentOS)

    Initial request and seek request for PHP-streamed video :

        Request URL :http://mytestserver.net/video/V00000006.webm
    Request Method:GET
    Status Code:206 Partial Content
    Request Headers
    Accept :*/*
    Accept-Encoding:identity ;q=1, * ;q=0
    Accept-Language:da-DK,da ;q=0.8,en-US ;q=0.6,en ;q=0.4
    Cache-Control:no-cache
    Connection:keep-alive
    Cookie:PHPSESSID=i562540rek172mnv3nk528acj0 ; userPassword= ; userEmail=
    Host:mytestserver.net
    Pragma:no-cache
    Range:bytes=0-
    Referer :http://mytestserver.net/video.html
    User-Agent:Mozilla/5.0 (X11 ; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36
    Response Headers
    Accept-Ranges:bytes
    Cache-Control:no-store, no-cache, must-revalidate, post-check=0, pre-check=0
    Connection:close
    Content-Length:8566268
    Content-Range:bytes 0-8566267/8566268
    Content-Type:video/webm
    Date:Fri, 11 Apr 2014 13:31:27 GMT
    Expires:Thu, 19 Nov 1981 08:52:00 GMT
    Pragma:no-cache
    Server:Apache/2.2.3 (CentOS)
    X-Powered-By:PHP/5.3.27

        —
    

        Request URL :http://mytestserver.net/video/V00000006.webm
    
    Request Headers CAUTION : Provisional headers are shown.
    
    Accept-Encoding:identity ;q=1, * ;q=0
    
    Cache-Control:no-cache
    
    Pragma:no-cache
    
    Range:bytes=4338314-
    
    Referer :http://mytestserver.net/video.html
    
    User-Agent:Mozilla/5.0 (X11 ; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36

    Notice how the second request does not complete, Provisional headers are shown.

    I have tried altering the cache headers, setting it to the future, setting them blank and using file attachment headers.

    I tried fiddling around a lot with the serving code, but lately I have ended up with a simple example.

    &lt;?php
    

    
$path = &#39;test.webm&#39;;
    

    
$size=filesize($path);
    

    
$fm=@fopen($path,&#39;rb&#39;);
    
if(!$fm) {
    
  header ("HTTP/1.0 404 Not Found");
    
  die();
    
}
    

    
$begin=0;
    
$end = $size-1;
    

    
if(isset($_SERVER[&#39;HTTP_RANGE&#39;])) {
    
  if(preg_match(&#39;/bytes=\h*(\d+)-(\d*)[\D.*]?/i&#39;, $_SERVER[&#39;HTTP_RANGE&#39;], $matches)) {
    
    $begin=intval($matches[0]);
    
    if(!empty($matches[1])) {
    
      $end=intval($matches[1]);
    
    }
    
  }
    
}
    

    
if($begin>0||$end&lt;$size)
    
  header(&#39;HTTP/1.0 206 Partial Content&#39;);
    
else
    
  header(&#39;HTTP/1.0 200 OK&#39;);
    

    
header("Content-Type: video/webm");
    
header(&#39;Accept-Ranges: bytes&#39;);
    
header(&#39;Content-Length:&#39;.($end-$begin+1));
    
header("Content-Disposition: inline;");
    
header("Content-Range: bytes $begin-$end/$size");
    
header("Content-Transfer-Encoding: binary\n");
    
header(&#39;Connection: close&#39;);
    

    
ob_get_clean();
    
flush();
    

    
$f = fopen($path, &#39;r&#39;);
    
fseek($f, $offset);
    

    
$pos = 0;
    
$length = $end-$begin;
    

    
while($pos &lt; $length)
    
{
    
    $chunk = min($length-$pos, 1024);
    

    
    echo fread($f, $chunk);
    
    flush();
    

    
    $pos += $chunk;
    
}
    
?>

    Please note, entering the PHP-delivered video URL directly into the browser does not make a difference from showing it in a HTML page.

    I hope someone has an answer to why seeking might not work. Let me know if you have any suggestions.

    Thanks !

  • Errors in compiling FFmpeg for windows10/aarch64 using Microsoft Visual Studio 2017 Preview edition

    29 octobre 2018, par Narsinga

    I am trying to compile FFmpeg (the Chromium version) for Windows10/Aarch64 configuration using Microsoft Visual Studio 2017 Preview community edition. I am running into errors in the assembly files as copied below (highlighted few errors). I believe FFmpeg is working for Linux/Aarch64 configuration (probably using GNU assembler) already in which case the same assembly code should also work for Microsoft ARM Macro Assembler as well. Please let me know if I am missing anything here and any pointers to help resolve the errors.

    D :\Work\Chromium_FFmpeg\chromium\src>ninja -C out\ARM64V8 third_party\ffmpeg
    ninja : Entering directory `out\ARM64V8’
    [2/9] ASM obj/third_party/ffmpeg/ffmpeg_internal/autorename_libavcodec_aarch64_fft_neon.obj
    FAILED : obj/third_party/ffmpeg/ffmpeg_internal/autorename_libavcodec_aarch64_fft_neon.obj
    D :/Work/Chromium_FFmpeg/depot_tools/win_tools-2_7_6_bin/python/bin/python.exe ../../build/toolchain/win/tool_wrapper.py asm-wrapper environment.arm64 armasm64.exe /Foobj/third_party/ffmpeg/ffmpeg_internal/autorename_libavcodec_aarch64_fft_neon.obj ../../third_party/ffmpeg/libavcodec/aarch64/autorename_libavcodec_aarch64_fft_neon.S
    Microsoft (R) ARM Macro Assembler Version 14.16.26926.0 for 64 bits
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\autorename_libavcodec_aarch64_fft_neon.S(1) : error A2003 : improper line syntax : /
    // File automatically generated. See crbug.com/495833.
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\autorename_libavcodec_aarch64_fft_neon.S(2) : error A2230 : Illegal preprocessor directive ; only "#line [filename]" is recognized
    include "fft_neon.S"
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\autorename_libavcodec_aarch64_fft_neon.S(3) : warning A4045 : missing END directive
    include "fft_neon.S"
    .
    .
    .
    [6/9] ASM obj/third_party/ffmpeg/ffmpeg_internal/mpegaudiodsp_neon.obj
    FAILED : obj/third_party/ffmpeg/ffmpeg_internal/mpegaudiodsp_neon.obj
    D :/Work/Chromium_FFmpeg/depot_tools/win_tools-2_7_6_bin/python/bin/python.exe ../../build/toolchain/win/tool_wrapper.py asm-wrapper environment.arm64 armasm64.exe /Foobj/third_party/ffmpeg/ffmpeg_internal/mpegaudiodsp_neon.obj ../../third_party/ffmpeg/libavcodec/aarch64/mpegaudiodsp_neon.S
    Microsoft (R) ARM Macro Assembler Version 14.16.26926.0 for 64 bits
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(1) : error A2003 : improper line syntax : /
    /*
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(2) : error A2079 : improper line syntax ; symbol expected
    * Copyright (c) 2014 Janne Grunau
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(3) : error A2079 : improper line syntax ; symbol expected
    *
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(4) : error A2079 : improper line syntax ; symbol expected
    * This file is part of FFmpeg.
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(5) : error A2079 : improper line syntax ; symbol expected
    *
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(6) : error A2079 : improper line syntax ; symbol expected
    * FFmpeg is free software ; you can redistribute it and/or
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(7) : error A2079 : improper line syntax ; symbol expected
    * modify it under the terms of the GNU Lesser General Public
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(8) : error A2079 : improper line syntax ; symbol expected
    * License as published by the Free Software Foundation ; either
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(9) : error A2079 : improper line syntax ; symbol expected
    * version 2.1 of the License, or (at your option) any later version.
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(10) : error A2079 : improper line syntax ; symbol expected
    *
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(11) : error A2079 : improper line syntax ; symbol expected
    * FFmpeg is distributed in the hope that it will be useful,
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(12) : error A2079 : improper line syntax ; symbol expected
    * but WITHOUT ANY WARRANTY ; without even the implied warranty of
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(13) : error A2079 : improper line syntax ; symbol expected
    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(14) : error A2079 : improper line syntax ; symbol expected
    * Lesser General Public License for more details.
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(15) : error A2079 : improper line syntax ; symbol expected
    *
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(16) : error A2079 : improper line syntax ; symbol expected
    * You should have received a copy of the GNU Lesser General Public
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(17) : error A2079 : improper line syntax ; symbol expected
    * License along with FFmpeg ; if not, write to the Free Software
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(18) : error A2079 : improper line syntax ; symbol expected
    * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(19) : error A2079 : improper line syntax ; symbol expected
    */
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(21) : error A2230 : Illegal preprocessor directive ; only "#line [filename]" is recognized
    include "libavutil/aarch64/asm.S"
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(23) : error A2230 : Illegal preprocessor directive ; only "#line [filename]" is recognized
    define FRAC_BITS 23 // fractional bits for sb_samples and dct
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(24) : error A2230 : Illegal preprocessor directive ; only "#line [filename]" is recognized
    define WFRAC_BITS 16 // fractional bits for window
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(25) : error A2230 : Illegal preprocessor directive ; only "#line [filename]" is recognized
    define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15)
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(27) : error A2034 : unknown opcode : tbl_rev128_s
    const tbl_rev128_s, align=4
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(28) : error A2034 : unknown opcode : .
    .byte 12, 13, 14, 15
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(29) : error A2034 : unknown opcode : .
    .byte 8, 9, 10, 11
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(30) : error A2034 : unknown opcode : .
    .byte 4, 5, 6, 7
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(31) : error A2034 : unknown opcode : .
    .byte 0, 1, 2, 3
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(34) : error A2003 : improper line syntax : .
    .macro apply_window type, st
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(35) : error A2034 : unknown opcode : ff_mpadsp_apply_window_
    function ff_mpadsp_apply_window_\type()_neon, export=1
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(42) : error A2034 : unknown opcode : movrel
    movrel x15, tbl_rev128_s
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(44) : error A2003 : improper line syntax : .
    .ifc \type, fixed
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(46) : error A2003 : improper line syntax : .
    .else
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(48) : error A2003 : improper line syntax : .
    .endif
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(53) : error A2173 : syntax error in expression
    sub x5, x5, x4 // samples2
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(53) : error A2003 : improper line syntax : Trouble parsing operands
    sub x5, x5, x4 // samples2
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(54) : error A2173 : syntax error in expression
    neg x13, x4 // -incr
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(54) : error A2003 : improper line syntax : Trouble parsing operands
    neg x13, x4 // -incr
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(56) : error A2003 : improper line syntax : .
    .ifc \type, fixed
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(57) : error A2173 : syntax error in expression
    ld1r v16.2s, [x2] // dither_state
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(57) : error A2003 : improper line syntax : Trouble parsing operands
    ld1r v16.2s, [x2] // dither_state
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(60) : error A2061 : illegal expression type ; expected absolute numeric
    movi v30.2d, #(1/ 64 * 8 * sizeof(int32_t)
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(101) : error A2003 : improper line syntax : Trouble parsing operands
    sub x10, x10, #64<<5 // 64 * 8 * sizeof(int32_t)
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(103) : error A2003 : improper line syntax : .
    .ifc \type, fixed
    D :\Work\Chromium_FFmpeg\chromium\src\third_party\ffmpeg\libavcodec\aarch64\mpegaudiodsp_neon.S(105) : error A2034 : unknown opcode : ext
    ext v28.16b, v29.16b, v28.16b, #8
    .
    .
    .

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