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• getting errors from FFMpeg when spawned from .NET

  18 mars 2014, par Brannon

  When I run FFMpeg from the command line like this

  ffmpeg.exe -hwaccel auto -re -i "C:\Users\Public\Videos\Sample Videos\Wildlife.wmv" -an -sn -c:v bmp -pix_fmt bgr24 -f rawvideo - > junk.bin

  it works fine. However, when I spawn the exact same thing (minus > junk.bin) I get this nasty "bad header" error after a few seconds of playback. What is causing this ? I have trouble believing my process blocks the pipe longer than the filesystem does, but it should be able to block the pipe indefinitely without defeating the decoding. The truncated stderr is below. My code to spawn the thing is here.

  ffmpeg version N-60761-g916a792 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Feb 19 2014 21:57:22 with gcc 4.8.2 (GCC)
  
    configuration: --target-os=mingw32 --enable-shared --enable-runtime-cpudetect
  
    libavutil      52. 65.100 / 52. 65.100
  
    libavcodec     55. 52.102 / 55. 52.102
  
    libavformat    55. 33.100 / 55. 33.100
  
    libavdevice    55. 10.100 / 55. 10.100
  
    libavfilter     4.  1.103 /  4.  1.103
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
  cygwin warning:
  
    MS-DOS style path detected: C:\Users\Public\Videos\Sample Videos\Wildlife.wmv
  
    Preferred POSIX equivalent is: /cygdrive/c/Users/Public/Videos/Sample Videos/Wildlife.wmv
  
    CYGWIN environment variable option "nodosfilewarning" turns off this warning.
  
    Consult the user's guide for more details about POSIX paths:
  
      http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
  
  [asf @ 0x600059480] Stream #0: not enough frames to estimate rate; consider increasing probesize
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
  Input #0, asf, from 'C:\Users\Public\Videos\Sample Videos\Wildlife.wmv':
  
    Metadata:
  
      SfOriginalFPS   : 299700
  
      WMFSDKVersion   : 11.0.6001.7000
  
      WMFSDKNeeded    : 0.0.0.0000
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
  
      title           : Wildlife in HD
  
      copyright       : © 2008 Microsoft Corporation
  
      IsVBR           : 0
  
      DeviceConformanceTemplate: AP@L3
  
    Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s
  
      Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp, 192 kb/s
  
      Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x720, 5942 kb/s, 29.97 tbr, 1k tbn, 1k tbc
  
  Output #0, rawvideo, to 'pipe:':
  
    Metadata:
  
      SfOriginalFPS   : 299700
  
      WMFSDKVersion   : 11.0.6001.7000
  
      WMFSDKNeeded    : 0.0.0.0000
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
  
      title           : Wildlife in HD
  
      copyright       : © 2008 Microsoft Corporation
  
      IsVBR           : 0
  
      DeviceConformanceTemplate: AP@L3
  
      encoder         : Lavf55.33.100
  
      Stream #0:0(eng): Video: bmp, bgr24, 1280x720, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (vc1 -> bmp)
  
  Press [q] to stop, [?] for help
  
  frame=    3 fps=0.0 q=0.0 size=    8100kB time=00:00:00.10 bitrate=662902.1kbits/s    
  
  frame=   29 fps= 26 q=0.0 size=   78302kB time=00:00:00.96 bitrate=662902.3kbits/s    
  
  frame=   50 fps= 30 q=0.0 size=  135003kB time=00:00:01.66 bitrate=662902.2kbits/s    
  
  frame=   65 fps= 30 q=0.0 size=  175503kB time=00:00:02.16 bitrate=662902.2kbits/s    
  
  frame=   80 fps= 30 q=0.0 size=  216004kB time=00:00:02.66 bitrate=662902.1kbits/s    
  
  frame=   95 fps= 30 q=0.0 size=  256505kB time=00:00:03.16 bitrate=662902.1kbits/s    
  
  [asf @ 0x600059480] ff asf bad header 74  at:5053733
  
  [asf @ 0x600059480] invalid packet_length -1908511255 at:5053740
  
  [asf @ 0x600059480] ff asf bad header d4  at:5053759
  
  [asf @ 0x600059480] ff asf skip 55629 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5181733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5189733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5197733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5205733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5213733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5221733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5229733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5237733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5245733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5357733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5365733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5373733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5381733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5493733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5501733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5509733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5517733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5629733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5637733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5645733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5653733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5701733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5709733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5717733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5725733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5805733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5813733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5821733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5829733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5877733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5885733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5893733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5901733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5949733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5957733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5965733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] ff asf bad header 0  at:5973733
  
  [asf @ 0x600059480] ff asf skip 7991 (unknown stream)
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 15 times
  
  [asf @ 0x600059480] unexpected packet_replic_size of 2
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 7 times
  
  [asf @ 0x600059480] ff asf skip 2562 (unknown stream)
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 3 times
  
  [asf @ 0x600059480] ff asf skip 448 (unknown stream)
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 9 times
  
  [asf @ 0x600059480] unexpected packet_replic_size of 6
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 7 times
  
  [asf @ 0x600059480] packet_frag_size is invalid (1749-9)
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 13 times
  
  [asf @ 0x600059480] packet_frag_size is invalid (1749-9)
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 24 times
  
  [asf @ 0x600059480] unexpected packet_replic_size of 6
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 6 times
  
  [asf @ 0x600059480] unexpected packet_replic_size of 5
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 6 times
  
  [asf @ 0x600059480] packet_frag_size is invalid (1749-9)
  
  [asf @ 0x600059480] packet_obj_size invalid
  
  [asf @ 0x600059480] packet_frag_size is invalid (1749-9)
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 2 times
  
  [asf @ 0x600059480] unexpected packet_replic_size of 5
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 8 times
  
  [asf @ 0x600059480] unexpected packet_replic_size of 5
  
  [asf @ 0x600059480] packet_obj_size invalid
  
      Last message repeated 39 times
  
  [asf @ 0x600059480] packet_frag_size is invalid (1749-40)

• 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) ?

• 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