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• avutil/pixfmt : add XV48 pixel format

  23 octobre 2024, par James Almer

  avutil/pixfmt : add XV48 pixel format
  Much like XV30 and XV36 in d75c4693fef51e8f0a1b88798530f4c5147ea906,
  
  XV48 is added to support 16bit 4:4:4 as defined by Microsoft.
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] doc/APIchanges
  • [DH] libavutil/pixdesc.c
  • [DH] libavutil/pixfmt.h
  • [DH] libavutil/tests/pixfmt_best.c
  • [DH] libavutil/version.h
  • [DH] tests/ref/fate/imgutils
  • [DH] tests/ref/fate/pixfmt_best
  • [DH] tests/ref/fate/sws-pixdesc-query

• 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.