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• why cmd just print command and dosen't work ?

  11 octobre 2019, par 杨士弘

  I tried create a website that could upload mp4 then my server would transcode it to ts and create a m3u8 playlist。
  I wanted to use cmd to control ffmpeg to do this，and I use visual basic to do this.

  Here is my code：

    Dim fileName As String = "borderoflife"
  
    Dim file As String = "borderoflife.mp4"
  
    Dim appPath As String = "C:\allen0916\"
  
    Dim saveDir As String = "test2\"
  
  
  
    Dim savePath As String = appPath & saveDir
  
    Dim saveResult As String = savePath & file
  
  
  
    Dim Content_Type_A As String = "video/mp4"
  
  
  
    Dim m3u8Path As String = Path.Combine(savePath, fileName + ".m3u8")
  
    Dim para As String = String.Format("/C ffmpeg -i {0} -profile:v baseline -level 3.0 -s 640x360 -start_number 0 -hls_time 10 -hls_list_size 0 -f hls {1} ", saveResult, m3u8Path)
  
  
  
    Dim output As String = "none" 
  
    Dim p As Process = New Process()
  
  
  
    p.StartInfo.FileName = "cmd.exe"
  
    p.StartInfo.UseShellExecute = False 
  
    p.StartInfo.RedirectStandardInput = True 
  
    p.StartInfo.RedirectStandardOutput = True 
  
    p.StartInfo.RedirectStandardError = True 
  
    p.StartInfo.CreateNoWindow = True 
  
    p.Start()
  
    p.StandardInput.WriteLine(para) 
  
    p.StandardInput.WriteLine("exit")
  
    p.StandardInput.AutoFlush = True
  
    p.StandardInput.Close() 
  
    output = p.StandardOutput.ReadToEnd() 
  
    p.WaitForExit()
  
    p.Close()
  
  
  
   If System.IO.File.Exists(m3u8Path) <> True Then
  
        context.Response.Write(output)
  
    Else
  
        context.Response.Write("Success")
  
    End If  

  and every time output just returns ：

  Microsoft Windows [version 10.0.17763.737]
  
  (c) 2018 Microsoft Corporation. 
  
  
  
  c:\windows\system32\inetsrv>/C ffmpeg -i C:\allen0916\test2\borderoflife.mp4 -profile:v baseline -level 3.0 -s 640x360 -start_number 0 -hls_time 10 -hls_list_size 0 -f hls C:\allen0916\test2\borderoflife.m3u8 
  
  
  
  c:\windows\system32\inetsrv>exit

  it seems cmd.exe just print my command and not working，
  Dose somebody know why？

• Anomalie #4799 (Nouveau) : Validité du RSS

  26 mai 2021

  Marc, sur https://discuter.spip.net/t/rss-atom-enclosures-et-w3c/152922 signale quelques points de validité à améliorer sur le RSS de la dist

  backend.html¶

  • balise rss : rajout d’un lien xmlns:atom="http://www.w3.org/2005/Atom"
  • balise channel : rajout de
  • réf : Missing atom:link with rel="self"

  squelette rss-item.html (ou inc-rss.html)¶

  • enclosures multiples : item contains more than one enclosure
  • suggestion (discutable) rajouter un critère {0,1} dans la boucle document de rss-item.html

  <span class="CodeRay">
  
  <span class="tag">span><span class="error">(</span><span class="attribute-name">DOCUMENTS</span><span class="error">)</span><span class="error">{</span><span class="attribute-name">id_article</span><span class="error">}</span><span class="error">{</span><span class="attribute-name">mode</span>=<span class="attribute-value">document</span><span class="error">}</span><span class="error">{</span><span class="attribute-name">doublons</span><span class="error">}</span><span class="error">{</span><span class="attribute-name">0</span><span class="error">,</span><span class="attribute-name">1</span><span class="error">}</span><span class="tag">></span>[
  
  <span class="tag">span> <span class="attribute-name">url</span>=<span class="string"><span class="delimiter">"</span><span class="content">(#URL_DOCUMENT|url_absolue|unique)</span><span class="delimiter">"</span></span><span class="error">[</span> <span class="attribute-name">length</span>=<span class="string"><span class="delimiter">"</span><span class="content">(#TAILLE)</span><span class="delimiter">"</span></span><span class="error">]</span><span class="error">[</span> <span class="attribute-name">type</span>=<span class="string"><span class="delimiter">"</span><span class="content">(#MIME_TYPE)</span><span class="delimiter">"</span></span><span class="error">]</span> <span class="tag">/></span>]
  
  <span class="tag"></span>
  
  </span></span></span>

• FFMPEG - Insert text MP4 and closed

  29 septembre 2015, par Celso Lopes

  I am using FFmpeg to insert text in a video. However I did not want it ENCODED The Full Video . Just as I want the text to be inserted at 20 seconds, then I want to stop coding. Since I’ll encode several videos a day.
  I just need to add the text and do NOT need to to read entire video.

  Next I use the command , only that it encodes the Full Video .

  ffmpeg -i original.mp4 -strict experimental -vf "drawtext=fontfile='/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf':text='Liberado para Celso':x=500:y=10:fontsize=9" saida3.mp4

  I believe I don’t need to generate a MP4 as output, just that it inserts the text and be fast !