Recherche avancée

Sur d’autres sites (5925)

• 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
  .
  .
  .

• FFmpeg : Image scrolling, with green background ?

  22 octobre 2018, par John Reese

  Good morning, I hope you are well.

  Please, I need help with the following...

  I’m moving an image vertically, and I see that the background of the video is green.
  How can I change this background color ?

  Example code :

  ffmpeg -loop 1 -t 24 -i "image.jpg" -filter_complex "nullsrc=size=640x360[background] ;[background][0:v]overlay=shortest=1:y=’min(0,-(t)*26)’" -qscale 1 -y out.mpg

  Video Result : https://youtu.be/98rKLVO56wA

  I hope I can help,

  Thank you very much,
  Greetings,
  Hugo

• WebM file not seekable in Chrome when loaded through PHP (other browsers work)

  13 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.

  <?php
  
  
  
  $path = 'test.webm';
  
  
  
  $size=filesize($path);
  
  
  
  $fm=@fopen($path,'rb');
  
  if(!$fm) {
  
    header ("HTTP/1.0 404 Not Found");
  
    die();
  
  }
  
  
  
  $begin=0;
  
  $end = $size-1;
  
  
  
  if(isset($_SERVER['HTTP_RANGE'])) {
  
    if(preg_match('/bytes=\h*(\d+)-(\d*)[\D.*]?/i', $_SERVER['HTTP_RANGE'], $matches)) {
  
      $begin=intval($matches[0]);
  
      if(!empty($matches[1])) {
  
        $end=intval($matches[1]);
  
      }
  
    }
  
  }
  
  
  
  if($begin>0||$end<$size)
  
    header('HTTP/1.0 206 Partial Content');
  
  else
  
    header('HTTP/1.0 200 OK');
  
  
  
  header("Content-Type: video/webm");
  
  header('Accept-Ranges: bytes');
  
  header('Content-Length:'.($end-$begin+1));
  
  header("Content-Disposition: inline;");
  
  header("Content-Range: bytes $begin-$end/$size");
  
  header("Content-Transfer-Encoding: binary\n");
  
  header('Connection: close');
  
  
  
  ob_get_clean();
  
  flush();
  
  
  
  $f = fopen($path, 'r');
  
  fseek($f, $offset);
  
  
  
  $pos = 0;
  
  $length = $end-$begin;
  
  
  
  while($pos < $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 !