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• Trolls in trouble

  6 juin 2013, par Mans — Law and liberty

  Life as a patent troll is hopefully set to get more difficult. In a memo describing patent trolls as a “drain on the American economy,” the White House this week outlined a number of steps it is taking to stem this evil tide. Chiming in, the Chief Judge of the Court of Appeals for the Federal Circuit (where patent cases are heard) in a New York Times op-ed laments the toll patent trolling is taking on the industry, and urges judges to use powers already at their disposal to make the practice less attractive. However, while certainly a step in the right direction, these measures all fail to address the more fundamental properties of the patent system allowing trolls to exist in the first place.

  System and method for patent trolling

  Most patent trolling operations comprise the same basic elements :

  1. One or more patents with broad claims.
  2. The patents of (1) acquired by an otherwise non-practising entity (troll).
  3. The entity of (2) filing numerous lawsuits alleging infringement of the patents of (1).
  4. The lawsuits of (3) targeting end users or retailers.
  5. The lawsuits of (3) listing as plaintiffs difficult to trace shell companies.

  The recent legislative actions all take aim at the latter entries in this list. In so doing, they will no doubt cripple the trolls, but the trolls will remain alive, ready to resume their wicked ways once a new loophole is found in the system.

  To kill a patent troll

  As Judge Rader and his co-authors point out in the New York Times, “the problem stems largely from the fact that, [...] trolls have an important strategic advantage over their adversaries : they don’t make anything.” This is the heart of the troll, and this is where the blow should be struck. Our weapon shall be the mightiest judicial sword of all, the Constitution.

  The United States Constitution contains (in Article I, Section 8) the foundation for the patent system (emphasis mine) :

  The Congress shall have Power [...] To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries.

  Patent trolls are typically not inventors. They are merely hoarders of other people’s discarded inventions, and that allowing others to reap the benefits of an inventor’s work would somehow promote progress should be a tough argument. Indeed, it is the dissociation between investment and reward which has allowed the patent trolls to rise and prosper.

  In light of the above, the solution to the troll menace is actually strikingly simple : make patents non-transferable.

  Having the inventor retain the rights to his or her inventions (works for hire still being recognised), would render the establishment of non-practising entities, which most trolls are, virtually impossible. The original purpose of patents, to protect the investment of inventors, would remain unaffected, if not strengthened, by such a change.

  Links

  • Taking on Patent Trolls to Protect American Innovation
  • Fact Sheet : White House Task Force on High-Tech Patent Issues
  • Make Patent Trolls Pay in Court
  • Constitution of the United States

• How to use a Pipe between two processes in Process.Start

  4 juin 2015, par Zed Machine

  I have to run this command line using VB.NET :

  "H :\videotest\test.vpy" - -y | "H :\Release\data\bin64\ffmpeg.exe" -hwaccel auto -y -i - -map 0:v:0 -c:v libx265 -crf 20.0 -preset 5 -x265-params level=0:profile=undefined:pmode:no-pme:pme:no-high-tier:ref=3:bframes=4:open-gop:keyint=250:min-keyint=25:b-adapt=2:bframe-bias=0:rc-lookahead=20:no-scenecut:b-pyramid:me=hex:subme=2:merange=57:temporal-mvp:weightp:no-weightb:max-merge=2:no-weightb:no-rect:no-amp:vbv-bufsize=0:vbv-maxrate=0:vbv-init=0.9:no-strict-cbr:qcomp=0.6:qstep=4:aq-mode=1:aq-strength=1.0:cutree:no-early-skip:min-cu-size=8:ctu=64:no-fast-cfb:ipratio=1.4:pbratio=1.3:cbqpoffs=0:crqpoffs=0:rd=3:psy-rd=0.3:psy-rdoq=1:no-b-intra:no-fast-intra:rdoq-level=1:no-tskip:no-tskip-fast:cu-lossless:tu-intra-depth=1:tu-inter-depth=1:strong-intra-smoothing:no-constrained-intra:nr-intra=0:nr-inter=0:qblur=0.5:cplxblur=20:signhide:sar=16
  "H :\videotest\outputawdwd.mkv"

  vspipe.exe runs the test.vpy script and applies filters to or resizes video input, then the output is piped to ffmpeg for the encoding.

  If I use a normal Process declaration with vspipe it gives the following error :

  Unknown argument : |

  From the command line the script works well. I suspect that means that I have to manually pipe between vspipe and ffmpeg.

  Is it possible to manually pipe output from one process to another ? Must I do it manually ?

  Here is my function to start process :

  executablepath = "H:\Project\VapourSynth\core64\vspipe.exe"
  
  
  
  params = "H:\videotest\test.vpy" - -y | "H:\Release\data\bin64\ffmpeg.exe" -hwaccel auto -y -i - -map 0:v:0 -c:v libx265 -crf 20.0 -preset 5 -x265-params level=0:profile=undefined:pmode:no-pme:pme:no-high-tier:ref=3:bframes=4:open-gop:keyint=250:min-keyint=25:b-adapt=2:bframe-bias=0:rc-lookahead=20:no-scenecut:b-pyramid:me=hex:subme=2:merange=57:temporal-mvp:weightp:no-weightb:max-merge=2:no-weightb:no-rect:no-amp:vbv-bufsize=0:vbv-maxrate=0:vbv-init=0.9:no-strict-cbr:qcomp=0.6:qstep=4:aq-mode=1:aq-strength=1.0:cutree:no-early-skip:min-cu-size=8:ctu=64:no-fast-cfb:ipratio=1.4:pbratio=1.3:cbqpoffs=0:crqpoffs=0:rd=3:psy-rd=0.3:psy-rdoq=1:no-b-intra:no-fast-intra:rdoq-level=1:no-tskip:no-tskip-fast:cu-lossless:tu-intra-depth=1:tu-inter-depth=1:strong-intra-smoothing:no-constrained-intra:nr-intra=0:nr-inter=0:qblur=0.5:cplxblur=20:signhide:sar=16 "H:\videotest\outputawdwd.mkv"
  
  
  
  Private Sub CreateJobProcess(ByVal Name, ByVal executablepath, ByVal params)
  
  
  
      Try
  
  
  
          If Not jobs_processes.ContainsKey(Name) Then
  
  
  
              Dim Proc As New Process
  
  
  
              Proc.StartInfo.UseShellExecute = False
  
              Proc.StartInfo.CreateNoWindow = True
  
              Proc.StartInfo.RedirectStandardError = True
  
              Proc.StartInfo.FileName = "" & executablepath & ""
  
              Proc.StartInfo.Arguments = params
  
  
  
              'start process
  
              Proc.Start()
  
  
  
              'add new process to dictionary
  
              jobs_processes.Add(Name, Proc)
  
  
  
              'TEMP
  
              My.Settings.giobbe -= 1
  
  
  
              'start background workers for statistics
  
              If Not ConversionStats.IsBusy Then
  
                  ConversionStats.WorkerSupportsCancellation = True
  
                  ConversionStats.RunWorkerAsync()
  
              End If
  
  
  
              If Not UpdateListJob.IsBusy Then
  
                  UpdateListJob.WorkerSupportsCancellation = True
  
                  UpdateListJob.RunWorkerAsync()
  
              End If
  
  
  
          End If
  
  
  
      Catch ex As Exception
  
          Me.Invoke(New MethodInvoker(Sub() Logbox.AppendText(Environment.NewLine & ">Program exception:" & Environment.NewLine & ex.Message & Environment.NewLine)))
  
          MsgBox(ex.Message)
  
      End Try
  
  End Sub

  Update :

  This is the block I have changed, this function get job name and parameters for the job that needs to be created, then it saves the process in a dictionary.

                Dim Proc As New Process
  
  
  
                  Proc.StartInfo.UseShellExecute = False
  
                  Proc.StartInfo.CreateNoWindow = True
  
                  Proc.StartInfo.RedirectStandardError = True
  
                  Proc.StartInfo.FileName = "cmd"
  
                  Proc.StartInfo.Arguments = params
  
  
  
                  'start process
  
                  Proc.Start()
  
  
  
                  'add new process to dictionary
  
                  jobs_processes.Add(Name, Proc)
  
  
  
                  'TEMP
  
                  My.Settings.giobbe -= 1
  
  
  
                  'start background workers for statistics
  
                  If Not ConversionStats.IsBusy Then
  
                      ConversionStats.WorkerSupportsCancellation = True
  
                      ConversionStats.RunWorkerAsync()
  
                  End If
  
  
  
                  If Not UpdateListJob.IsBusy Then
  
                      UpdateListJob.WorkerSupportsCancellation = True
  
                      UpdateListJob.RunWorkerAsync()
  
                  End If

  then i have a backgroundworker ( ConversionStats ) that get stderr from every process in the dictionary and print them into textboxes :

             'take current selected process and set streamreader
  
              Dim tmpproc As Process = jobs_processes(CurrentJob)
  
              Dim ffmpeg_stats As StreamReader
  
              Dim stdoutput As String = ""
  
  
  
              'something that verify if the job is started 
  
  
  
              If statejob = 1 Then    'if job is working
  
  
  
                  'take stderr from ffmpeg
  
                  ffmpeg_stats = tmpproc.StandardError
  
                  stdoutput = ffmpeg_stats.ReadLine()
  
  
  
                  If stdoutput IsNot Nothing Then 'if ffmpeg stderr is not nothing 
  
  
  
                      'IF FFMPEG IS RETURNING STATS
  
                      If stdoutput.Contains("frame=") Or stdoutput.Contains("size=") Then

  so this is my code...
  but now with cmd getting standarderror with streamreader result in taking a string "Invalid Handle." this is an error from cmd stderr or there is a problem with the streamreader ?

  UPDATE 2

  I have even tried to start a clean cmd process declaring only parameters but the result is just the console with main infos.

  Microsoft Windows [Versione 6.3.9600]
  (c) 2013 Microsoft Corporation. Tutti i diritti riservati.

  H :\Project\bin\Release>

  this is the code to clarify :

                  Dim Proc As New Process
  
  
  
                  Proc.StartInfo.FileName = "cmd"
  
                  Proc.StartInfo.Arguments = params
  
  
  
                  'start process
  
                  Proc.Start()

  SO AGAIN THERE IS SOMEONE WHO CAN GUIDE ME HOW TO PIPE/REDIRECT STDOUTPUT FROM ONE PROCESS (vspipe.exe) TO THE STDIN OF ANOTHER PROCESS (ffmpeg.exe) ?

• Video Streaming shows not working in Micorsoft Edge

  22 novembre 2018, par Ragesh S

  I am newbi in using Video streaming in ASP.Net MVC project. I have a video library webpplication, most of the videos are .mp4 format. Please see my code below.

  Code

  public HttpResponseMessage Get(string filename)
  
      {
  
          var filePath = new FileStreameHelpers().GetFilePath(filename);
  
          if (!File.Exists(filePath))
  
              return new HttpResponseMessage(HttpStatusCode.NotFound);
  
  
  
          var response = Request.CreateResponse();
  
          response.Headers.AcceptRanges.Add("bytes");
  
  
  
          var streamer = new FileStreameHelpers();
  
          streamer.FileInfo = new FileInfo(filePath);
  
          response.Content = new PushStreamContent(streamer.WriteToStream, new FileStreameHelpers().GetMimeType(Path.GetExtension(filePath)));
  
  
  
          RangeHeaderValue rangeHeader = Request.Headers.Range;
  
          if (rangeHeader != null)
  
          {
  
              long totalLength = streamer.FileInfo.Length;
  
              var range = rangeHeader.Ranges.First();
  
              streamer.Start = range.From ?? 0;
  
              streamer.End = range.To ?? totalLength - 1;
  
  
  
              response.Content.Headers.ContentLength = streamer.End - streamer.Start + 1;
  
              response.Content.Headers.ContentRange = new ContentRangeHeaderValue(streamer.Start, streamer.End,
  
                  totalLength);
  
              response.StatusCode = HttpStatusCode.PartialContent;
  
          }
  
          else
  
          {
  
              response.StatusCode = HttpStatusCode.OK;
  
          }
  
  
  
          return response;
  
      }
  
    public async Task WriteToStream(Stream outputStream, HttpContent content, TransportContext context)
  
      {
  
          try
  
          {
  
              var buffer = new byte[6553600];
  
              using (var video = FileInfo.OpenRead())
  
              {
  
                  if (End == -1)
  
                  {
  
                      End = video.Length;
  
                  }
  
                  var position = Start;
  
                  var bytesLeft = End - Start + 1;
  
                  video.Position = Start;
  
                  while (position <= End)
  
                  {
  
                      var bytesRead = video.Read(buffer, 0, (int)Math.Min(bytesLeft, buffer.Length));
  
                      await outputStream.WriteAsync(buffer, 0, bytesRead);
  
                      position += bytesRead;
  
                      bytesLeft = End - position + 1;
  
                  }
  
              }
  
          }
  
          catch (Exception ex)
  
          {
  
              // fail silently
  
              Utilities.SaveException("FileStreameHelpers - WriteToStream", ex);
  
          }
  
          finally
  
          {
  
              outputStream.Close();
  
          }
  
      }

  it works fine in Firefox and Chrome but it shows error in Microsoft Edge browser like below.

  HTML

  <video width="320" height="240" controls="controls">
  
      <source src="/api/Media/Get?filename=SampleVideo_1280x720_1mb.mp4" type="video/mp4">
  
      Your browser does not support the video tag.
  
  </source></video>

  The remote host closed the connection. The error code is 0x800703E3.

  Please advice.