Playing multiple audio files using system() in C - c

Question

I've written a C code to play 3 audio files one after other using vlc but the after playing first file it's not proceeding I've to press Ctrl+C or q to go to next song which I want to happen itself.
I placed system("q") after every file so that it may fulfill my task but it's still not working.
#include<stdio.h>
int main(){
system("vlc 1.mp3");
system("q");
system("vlc 2.mp3");
system("q");
system("vlc 3.mp3");
system("q");
return 0;
}

Answer 1

I think you should use mplayer in slave mode instead of vlc. It is more flexible and has more control. you can send command to mplayer as you wish. please study the following link
http://www.mplayerhq.hu/DOCS/tech/slave.txt
I suggest you to use python for linux and C# or VB.NET for windows. I can supply some vb.net code if you need it.

Answer 2

This was my old answer for another question.
but I will post here for you too.
I am developing android phone remote control + VB.NET TCP server - mplayer. I am using mplayer in slave mode. I send command from android app to VB.NET TCP server. Then the command will send to mplayer.
I will show some code that control and send the mplayer desired commands, but the server part is not finished yet. The coding is no finished yet but I hope it is useful for you.
Imports System.ComponentModel
Imports System.IO
Imports System.Data.OleDb
Public Class Form1
Private bw As BackgroundWorker = New BackgroundWorker
Dim i As Integer = 0
Dim dbFile As String = Application.StartupPath & "\Data\Songs.accdb"
Public connstring As String = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source=" & dbFile & "; persist security info=false"
Public conn As New OleDbConnection(connstring)
Dim sw As Stopwatch
Dim ps As Process = Nothing
Dim jpgPs As Process = Nothing
Dim args As String = Nothing
Private Sub bw_DoWork(ByVal sender As Object, ByVal e As DoWorkEventArgs)
Dim worker As BackgroundWorker = CType(sender, BackgroundWorker)
If bw.CancellationPending = True Then
e.Cancel = True
Exit Sub
Else
' Perform a time consuming operation and report progress.
'System.Threading.Thread.Sleep(500)
bw.ReportProgress(i * 10)
Dim dir_info As New DirectoryInfo(TextBox1.Text)
ListFiels("SongList", TextBox2.Text, dir_info)
End If
End Sub
Private Sub bw_RunWorkerCompleted(ByVal sender As Object, ByVal e As RunWorkerCompletedEventArgs)
If e.Cancelled = True Then
Me.tbProgress.Text = "Canceled!"
ElseIf e.Error IsNot Nothing Then
Me.tbProgress.Text = "Error: " & e.Error.Message
Else
Me.tbProgress.Text = "Done!"
End If
End Sub
Private Sub bw_ProgressChanged(ByVal sender As Object, ByVal e As ProgressChangedEventArgs)
Me.tbProgress.Text = e.ProgressPercentage.ToString() & "%"
End Sub
Private Sub Form1_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
Try
ps.Kill()
Catch
Debug.Write("already closed")
End Try
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Windows.Forms.Control.CheckForIllegalCrossThreadCalls = False 'To avoid error from backgroundworker
bw.WorkerReportsProgress = True
bw.WorkerSupportsCancellation = True
AddHandler bw.DoWork, AddressOf bw_DoWork
AddHandler bw.ProgressChanged, AddressOf bw_ProgressChanged
AddHandler bw.RunWorkerCompleted, AddressOf bw_RunWorkerCompleted
funPlayMusic()
End Sub
Private Sub buttonStart_Click(sender As Object, e As EventArgs) Handles buttonStart.Click
If Not bw.IsBusy = True Then
bw.RunWorkerAsync()
End If
End Sub
Private Sub buttonCancel_Click(sender As Object, e As EventArgs) Handles buttonCancel.Click
If bw.WorkerSupportsCancellation = True Then
bw.CancelAsync()
End If
End Sub
Private Sub btnSearch_Click(sender As Object, e As EventArgs) Handles btnSearch.Click
If Not bw.IsBusy = True Then
sw = Stopwatch.StartNew()
bw.RunWorkerAsync()
sw.Stop()
Label1.Text = ": " + sw.Elapsed.TotalMilliseconds.ToString() + " ms"
End If
End Sub
Private Sub ListFiels(ByVal tblName As String, ByVal pattern As String, ByVal dir_info As DirectoryInfo)
i = 0
Dim fs_infos() As FileInfo = Nothing
Try
fs_infos = dir_info.GetFiles(pattern)
Catch ex As Exception
MessageBox.Show(ex.ToString())
End Try
For Each fs_info As FileInfo In fs_infos
i += 1
Label1.Text = i
insertData(tblName, fs_info.FullName)
lstResults.Items.Add(i.ToString() + ":" + fs_info.FullName.ToString())
If i = 1 Then
Playsong(fs_info.FullName.ToString())
Else
i = 0
lstResults.Items.Clear()
End If
Next fs_info
sw.Stop()
Label1.Text = ": " + sw.Elapsed.TotalMilliseconds.ToString() + " ms"
fs_infos = Nothing
Dim subdirs() As DirectoryInfo = dir_info.GetDirectories()
For Each subdir As DirectoryInfo In subdirs
ListFiels(tblName, pattern, subdir)
Next
End Sub
Private Sub insertData(ByVal tableName As String, ByVal foundfile As String)
Try
If conn.State = ConnectionState.Open Then conn.Close()
conn.Open()
Dim SqlQuery As String = "INSERT INTO " & tableName & " (SngPath) VALUES (#sng)"
Dim SqlCommand As New OleDbCommand
With SqlCommand
.CommandType = CommandType.Text
.CommandText = SqlQuery
.Connection = conn
.Parameters.AddWithValue("#sng", foundfile)
.ExecuteNonQuery()
End With
conn.Close()
Catch ex As Exception
conn.Close()
MsgBox(ex.Message)
End Try
End Sub
Private Sub btnClearList_Click(sender As Object, e As EventArgs) Handles btnClearList.Click
lstResults.Items.Clear()
End Sub
Private Sub funPlayMusic()
ps = New Process()
ps.StartInfo.FileName = "D:\Music\mplayer.exe "
ps.StartInfo.UseShellExecute = False
ps.StartInfo.RedirectStandardInput = True
jpgPs = New Process()
jpgPs.StartInfo.FileName = "D:\Music\playjpg.bat"
jpgPs.StartInfo.UseShellExecute = False
jpgPs.StartInfo.RedirectStandardInput = True
'ps.StartInfo.CreateNoWindow = True
args = "-fs -noquiet -identify -slave " '
args += "-nomouseinput -sub-fuzziness 1 "
args += " -vo direct3d, -ao dsound "
' -wid will tell MPlayer to show output inisde our panel
' args += " -vo direct3d, -ao dsound -wid ";
' int id = (int)panel1.Handle;
' args += id;
End Sub
Public Function SendCommand(ByVal cmd As String) As Boolean
Try
If ps IsNot Nothing AndAlso ps.HasExited = False Then
ps.StandardInput.Write(cmd + vbLf)
'MessageBox.Show(ps.StandardOutput.ReadToEndAsync.ToString())
Return True
Else
Return False
End If
Catch ex As Exception
Return False
End Try
End Function
Public Sub Playsong(ByVal Songfilelocation As String)
Try
ps.Kill()
Catch
End Try
Try
ps.StartInfo.Arguments = args + " """ + Songfilelocation + """"
ps.Start()
SendCommand("set_property volume " + "80")
Catch e As Exception
MessageBox.Show(e.Message)
End Try
End Sub
Private Sub lstResults_SelectedIndexChanged(sender As Object, e As EventArgs) Handles lstResults.SelectedIndexChanged
Playsong(lstResults.SelectedItem.ToString())
End Sub
Private Sub btnPlayJPG_Click(sender As Object, e As EventArgs) Handles btnPlayJPG.Click
Try
' jpgPs.Kill()
Catch
End Try
Try
'ps.StartInfo.Arguments = "–fs –mf fps=5 mf://d:/music/g1/Image00020.jpg –loop 200" '-vo gl_nosw
'jpgPs.Start()
Shell("d:\Music\playjpg.bat")
' SendCommand("set_property volume " + "80")
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
Private Sub btnPlayPause_Click(sender As Object, e As EventArgs) Handles btnPlayPause.Click
SendCommand("pause")
End Sub
Private Sub btnMute_Click(sender As Object, e As EventArgs) Handles btnMute.Click
SendCommand("mute")
End Sub
Private Sub btnKaraoke_Click(sender As Object, e As EventArgs) Handles btnKaraoke.Click
'SendCommand("panscan 0-0 | 1-1")
SendCommand("af_add pan=2:1:1:0:0")
End Sub
Private Sub btnStereo_Click(sender As Object, e As EventArgs) Handles btnStereo.Click
SendCommand("af_add pan=2:0:0:1:1")
End Sub
Private Sub btnStop_Click(sender As Object, e As EventArgs) Handles btnStop.Click
Playsong("d:\music\iot.mp4")
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
'SendCommand("loadfile d:\music\iot.mp4")
'SendCommand("pt_step 1")
End Sub
End Class