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• Why Can't i view a few of my mp4 files in my .erb but can in html file ?

  27 avril 2016, par Joseph McKenzie

  I have a site that I’m working on for a customer and the strangest thing is happening to me. I pull in a list of videos from a database table and it plays the video that I want it to, this all works fine.

  For some reason some of the video files will not play in either chrome nor Firefox when viewing my page from an .erb file,but they will work in Microsoft edge. They will all work in an .html file though in all my browsers they are raw .264 files converted to mp4 via ffmpeg .

  I would think if it was a file corruption it wouldn’t play fine in a .html file or Edge.

  <% links[0,1].each do |links|%>-->
  
  
  
  <% if  links[1] == "Not_Watched"%>
  
  
  
  <video width="320" height="240" controls="controls">
  
  <source src="../videos/&lt;%=links[0]%>" type="video/mp4">
  
  
  
  </source></video>
  
  &lt;%end%>
  
  &lt;%end%>
  
  
  
   get '/page1' do
  
  
  
  
  
  thing1= database.execute("select * from thing1");
  
  thing2= database.execute("select * from thing2")                
  
  links = database.execute("select * from links")                 
  
  
  
  
  
  
  
     erb :page1, :locals => {:thing1=> thing1, :thing2=> thing2, :links => links}
  
  
  
  
  
  
  
   end

  I had to change some of the code names up because i cant put up to much of this code online...... and there is a lot more I didn’t include because didn’t have anything to do with anything as far as I could imagine. If anyone thinks it could have a bearing ill post some of it but changed up so that I can

• What video codec for little number of color ?

  12 mars 2013, par Scorpi0

  I am trying to make a video with AForge FFMPEG library.
  My video consist in little arrow moving, drawn with System.Drawing namespace.
  So I draw in a graphic, and I add image by image to the video. This method is inspired from this answer.

  Now, the prolem I got is that all the codecs I tried give very low result. The arrows have very bad borders, I don't think classic codec fit to this type of image.

  In fact, I need something very close to a raw format. But raw format give me 1Go video size for 5 seconds video.

  I'm only drawing arrow, filled with the same color, on a uniform background, so I wonder if there is a special video codec that can output a HD result with an acceptable file size.

  Painted arrow :

  Video arrow :

  The video will be shipped to our clients. So we are seeking for a solution with the least constraint on the reading process.

• Build FFmpeg with libaom using MSYS

  21 février 2021, par Alexander Dyagilev

  I'm trying to build FFmpeg (version 4.3.1) with --enable-libaom for Windows using MSYS and Microsoft Visual C++.

  


  Configure script says : ERROR: aom >= 1.0.0 not found using pkg-config

  


  But I have libaom (built it from sources) and paths to it are specified :

  


  set INCLUDE=%INCLUDE%;%~dp0..\..\libaom-build\prebuilt\include;
set LIB=%LIB%;%~dp0..\..\libaom-build\prebuilt\windows\x64\lib;


  


  This is how I call the configuration script :

  


  ./configure --prefix=$PWD/../../prebuilt/windows/x64 --toolchain=msvc --extra-cflags="-MD" --arch=x64 --disable-x86asm --disable-iconv --disable-network \
--enable-filter=stereo3d --enable-libmp3lame --enable-libaom --enable-libdav1d \
--extra-cflags="-I$PWD/../../../zlib-build/prebuilt/include -I$PWD/../../../libpng-build/prebuilt/include -I$PWD/../../../lame-build/prebuilt/include -I$PWD/../../../libaom-build/prebuilt/include -I$PWD/../../../libdav1d-build/prebuilt/include" \
--extra-ldflags="-L$PWD/../../../lame-build/prebuilt/windows/x64/lib -L$PWD/../../../libaom-build/prebuilt/windows/x64/lib -L$PWD/../../../libdav1d-build/prebuilt/windows/x64/lib"