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• What is a correct way of ffmpeg dshow webcamera properties save and load ?

  12 juin 2020, par C0oo1D

  Command (PS == Windows PowerShell) :

  



  PS D:\> ffmpeg -f dshow -show_video_device_dialog True -video_device_save some_profile.txt -i 'video=MicrosoftR LifeCam Studio(TM)'


  



  FFmpeg Header :

  



  ffmpeg version git-2020-06-04-7f81785 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200523
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 49.100 / 56. 49.100
  libavcodec     58. 90.100 / 58. 90.100
  libavformat    58. 44.100 / 58. 44.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 84.100 /  7. 84.100
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100


  



  Error after OK/Cancel/Close in camera settings dialog (empty file was created). Also tried without dialog - the same problem :

  



  [dshow @ 0715de40] Query for IPersistStream failed.
video=Microsoft® LifeCam Studio(TM): I/O error


  



  I assume that problem at the camera side, but I don't exclude my blindness (didn’t find any examples of saving settings or required command options in the documentation).

  



  Perhaps there is another way to save / load webcamera properties ?

  


• configure : Define feature test macros for —std=gnu99

  31 janvier 2016, par Henrik Gramner

  configure : Define feature test macros for —std=gnu99
  Makes the printf() family functions on MinGW use the correct C99 POSIX
  
  versions instead of the broken pre-VS2015 Microsoft ones.
  Also allows us to get rid of some _GNU_SOURCE and _ISOC99_SOURCE defines.
  

  • [DH] common/cpu.c
  • [DH] common/set.c
  • [DH] configure
  • [DH] encoder/analyse.c
  • [DH] encoder/ratecontrol.c
  • [DH] x264.c

• Run ffmpeg using shell_exec from a file called by AJAX

  20 décembre 2012, par user1255617

  Good morning,

  I will do my best to phrase a "thoughtful" and "helpful" question for all regarding running FFMPEG using shell_exec from a file called by AJAX. First I will start by listing my current code.

  AJAX script

          <code class="echappe-js">&lt;script&gt;<br />
  
              var xmlhttp;<br />
  
              if (window.XMLHttpRequest){// code for IE7+, Firefox, Chrome, Opera, Safari<br />
  
                xmlhttp=new XMLHttpRequest();<br />
  
              }else{// code for IE6, IE5<br />
  
                xmlhttp=new ActiveXObject(&quot;Microsoft.XMLHTTP&quot;);<br />
  
              }<br />
  
              xmlhttp.onreadystatechange=function(){<br />
  
                if (xmlhttp.readyState==4 &amp;amp;&amp;amp; xmlhttp.status==200){<br />
  
                    //Do something<br />
  
                }<br />
  
              }<br />
  
              xmlhttp.open(&quot;GET&quot;,&quot;video_convert.php&quot;,true);<br />
  
              xmlhttp.setRequestHeader(&quot;Content-type&quot;,&quot;application/x-www-form-urlencoded&quot;);<br />
  
              xmlhttp.send(id=&amp;lt;?php echo $video_upload_result; ?&gt;);<br />
  
          &lt;/script&gt;
  
  

  PHP Code

  $destination = "files/videos/";
  
  $ffmpeg = '/ffmpeg/ffmpeg';
  
  $videoid = mysql_clean($_GET['id']);
  
  
  
  $sql = "SELECT file_name FROM cb_video WHERE videoid = '$videoid' ";
  
  $result = mysql_query($sql);
  
  $row = mysql_fetch_assoc($result);
  
  
  
  $file_old = glob('files/videos/'.$file_name.'.*');
  
  
  
  shell_exec($ffmpeg." -i '/var/www/html/".$file_old[0]."' -ar 44100 /var/www/html/".$destination.$file_name.".flv");

  FFMPEG is installed and working properly as I have used it elsewhere on the site and have attempted a file conversion using PuTTY. I am able to run a PHP file called by AJAX as I have done it in a separate instance on this site. The only thing I can think of is that the shell_exec isn't running properly, which I have used elsewhere, since it is in a separate file called by ajax or else it is being closed pre-maturely. I have also tested this code in a main file and it works properly until I try to call the separate file with it in it.

  So, my question is can this code actually work and if so what steps should I take to get it working ?

  Also I would greatly appreciate it if before closing my questions I had a chance to defend or rephrase them to properly suit this boards high standards for questions if I have somehow failed it in any way.

  Thank you.