[Gambas-user] Shell comand + FFMPEG from gambas how to

[Martín]

Hi,

If I do this in the terminal it works:

ffmpeg -f pulse -i alsa_output.BLABLABLA.analog-stereo.monitor -i 
<(arecord -f CD) -filter_complex amix -acodec libmp3lame output.mp3

But if I do the same although Shell inside the gamabs code it doesn't work.

What I'm doing wrong? here is the sample code. The idea behind is record 
2 audio tracks at the same time one for the micro and other for the 
internal audio output.

Private hMicro As Process
Private hSystem As Process

Public Sub bRecord_Click()

   If bRecord.Value Then
     Record()
   Else
     Try hMicro.Kill
     Try hSystem.Kill
   Endif

End

Private Sub Record()

   Dim sBase As String
   Dim sMicro As String
   Dim sSystem As String

   sBase = Format(Now(), "yyyy_mm_dd_hhnnss")
   sMicro = "ffmpeg -f pulse -i alsa_input.BLABLABLA.analog-stereo 
-acodec libmp3lame " & sBase & "_micro.mp3"
   sSystem = "ffmpeg -f pulse -i 
alsa_output.BLABLABLA.analog-stereo.monitor -i <(arecord -f CD) 
-filter_complex amix -acodec libmp3lame " & sBase & "_system.mp3"

   hMicro = Shell sMicro For Read As "RMicro"
   hSystem = Shell sSystem For Read As "RSystem"

End

I was thinking to sent the Shell command in a direct way, without start 
a process first, but how I can kill the process, in the good way,  
later? Actually I use "killall ffmpeg"

Second point: it is possible sent 2 commands with ffmpeg? because I sent 
the first one and then the second one never occur.