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• avformat/options : log filename on open

  2 juin 2017, par Michael Niedermayer

  avformat/options : log filename on open
  The loglevel is choosen so that the main filename and any images of
  
  multi image sequences are shown only at debug level to avoid
  
  clutter.
  This makes exploits in playlists more visible. As they would show
  
  accesses to private/sensitive files
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/options.c
  • [DH] libavformat/utils.c

• Could not open file v_YoYo_g07_c04.jpeg av_interleaved_write_frame() : Input/output error

  26 octobre 2017, par Joseph

  the purpose of the following code is to extract frames from a list of videos.
  To do so l defined in python 3.5 extract_frames function which calls extract_frame function. In this latter a ffmpeg instruction is given to extract the frames

  def extract_frames(vidlist,vidDir,outputDir):
  
      f = open(vidlist, 'r')
  
      vids = f.readlines()
  
      f.close()
  
      vids = [video.rstrip() for video in vids]
  
      for vid in vids:
  
          videoName = os.path.join(vidDir,vid.split('.')[0]+".avi")
  
          frameName = os.path.join(outputDir, vid.split('.')[0]+".jpeg")
  
          extract_frame(videoName,frameName)
  
  extract_frames(trainlist01, ucf101_path,training_output)

  such that :

  ucf101_path = "/local/common-data/UCF/UCF-101" # Path to the root dataset
  
  trainlist01="/local/common-data/UCF/ucfTrainTestlist/trainlist01.txt"
  
  training_output = '/local/common-data/UCF/tmp_frames/train/'

  where trainlist01.txt contains a set of lines as follow (first column the path to the video and the second is the class of the video) :

  ApplyEyeMakeup/v_ApplyEyeMakeup_g08_c01.avi 1 .....

  And videoname and framename correspond for instance to :

  videoname="/local/common-data/UCF/UCF-101/YoYo/v_YoYo_g07_c04.avi"
  
  framename="/local/common-data/UCF/tmp_frames/test/YoYo/v_YoYo_g07_c04.jpeg"

  The error is returned by the following function

  import subprocess
  
  
  
      def extract_frame(videoName,frameName):
  
  
  
          if not os.path.exists(videoName):
  
              print('%s does not exist!' % videoName)
  
              return False
  
          # call ffmpeg and grab its stderr output
  
          p = subprocess.call('ffmpeg -i %s -r 1 -s qvga -t 1 -f image2 %s' % (videoName,frameName), shell=True)
  
          return p

  The error is :
  [image2 @ 0x422ff80] Could not open file : /local/common-data/UCF/tmp_frames/train/YoYo/v_YoYo_g25_c05.jpeg
  av_interleaved_write_frame() : Input/output error

  and the output files training_output where l supposed to get my frames is empty.

  files and folders ad subfolders have all right .

  What’s wrong with my code ?

  EDIT 1

  After creating a subfolder YoYo/ in /local/common-data/UCF/tmp_frames/train/ and run again the code l got this new error :

  Could not get frame filename number 2 from pattern '/local/common-data/UCF/tmp_frames/train/YoYo/v_YoYo_g25_c05‌​.jpeg' (either set updatefirst or use a pattern like %03d within the filename pattern) av_interleaved_write_frame(): Invalid argument

• How to copy a file open from open dialog to other location in vb.net

  4 juillet 2017, par Silvia Fonseca

  I have start a new application that converts video to image and then image to gif
  every thing is ok if i put my video in side of the same folder but if i not put my video in the same folder of the project the ffmpeg its says no such file or directory. wen i click to chose my file with openfiledialog , how can i copy or move my chose video to the correct directory in this case C :\avitogifconverter

  I have try to move the file to other location but wen i try to move the file to a different location its say i can not find the directory but the directory exist. what i have miss here this is the code

  This is my code

  Imports System.Diagnostics
  
  Imports System.ComponentModel
  
  Imports System
  
  Imports System.IO
  
  Imports System.IO.Compression
  
  Imports System.Windows.Forms
  
  Imports System.Net
  
  
  
  Public Class Form1
  
  Dim fpsx = 10
  
  Dim video = ""
  
  Dim startInfo As New ProcessStartInfo("ffmpeg.exe")
  
  Dim frame As Long 'individual frames
  
  Dim tempdir As String = "C:\avitogifconverter\" ' images temp directory
  
  Dim DestPath As String = "C:\avitogifconverter\"
  
  Public Declare Auto Function FindWindowNullClassName Lib "user32.dll" Alias "FindWindow" (ByVal lpClassname As Integer, ByVal lpWindownName As String) As Integer
  
  Dim Counter As Integer = 0
  
  
  
  Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
  
      My.Computer.FileSystem.CreateDirectory(tempdir)
  
      TextBox1.Text = "exp:-->video.avi or webm or flv"
  
      TextBox1.Clear()
  
      TextBox2.Text = fpsx
  
  
  
  
  
  End Sub
  
  
  
  
  
  Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
  
      fpsx = TextBox2.Text
  
      TextBox2.Text = fpsx
  
  
  
      Dim p As Process = Process.Start("cmd", "/k ffmpeg.exe -i " + TextBox1.Text + " -framerate 5/1 -filter:v fps=" + TextBox2.Text + " C:\avitogifconverter\out%02d.jpg")
  
      p.WaitForExit()
  
  
  
      If p.HasExited Then
  
          MsgBox("The Extraction Are Finish...")
  
      End If
  
  
  
  End Sub
  
  
  
  Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
  
  
  
  End Sub
  
  
  
  Private Sub Button2_Click(sender As Object, e As EventArgs)
  
  
  
  End Sub
  
  
  
  Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
  
  
  
  
  
      If (OpenFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK) Then
  
          'TextBox1.Text = OpenFileDialog1.FileName
  
          'TextBox1.Text = System.IO.Path.GetFileName(OpenFileDialog1.FileName)
  
          TextBox1.Text = System.IO.Path.GetDirectoryName(OpenFileDialog1.FileName)
  
          Dim newdialog As New OpenFileDialog()
  
          If newdialog.ShowDialog() = DialogResult.OK Then
  
              System.IO.File.Copy(newdialog.FileName, tempdir)
  
              MessageBox.Show(System.IO.Path.GetDirectoryName(newdialog.FileName) & "\" & System.IO.Path.GetFileName(newdialog.FileName))
  
          End If
  
      End If
  
      If TextBox1.Text = Nothing Then
  
          Return
  
      End If
  
      If TextBox1.Text <> Nothing Then
  
          'My.Computer.FileSystem.CopyFile(TextBox1.Text, DestPath)
  
      End If
  
  
  
  End Sub
  
  
  
  Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
  
      Dim args As String 'declare args
  
      args = " -i C:\avitogifconverter\out%02d.jpg -r 10 C:\avitogifconverter\out.gif "
  
      'args = " -i C:\avitogifconverter\out%02d.jpg -c:v libx264 -r 30 -pix_fmt yuv420p C:\avitogifconverter\out.mp4 "
  
      Dim proc As New Process
  
      Dim proci As New ProcessStartInfo
  
      proci.FileName = My.Application.Info.DirectoryPath & "\ffmpeg.exe"
  
      proci.Arguments = args
  
      proci.WindowStyle = ProcessWindowStyle.Hidden
  
      proci.CreateNoWindow = True
  
      proci.UseShellExecute = False
  
      proc.StartInfo = proci
  
      proc.Start()
  
      Do Until proc.HasExited = True
  
          Me.Text = "Saving"
  
      Loop
  
      Me.Text = "your video done"
  
  
  
      MsgBox("Done")
  
      Dim directoryName As String = "C:\avitogifconverter\"
  
      For Each deleteFile In Directory.GetFiles(directoryName, "*.jpg", SearchOption.TopDirectoryOnly)
  
          File.Delete(deleteFile)
  
      Next
  
  
  
      'IO.Directory.Delete(tempdir, True)
  
  End Sub
  
  
  
  Private Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.Click
  
      Form2.Show()
  
  
  
  End Sub
  
  End Class