[Gambas-user] gb.media - audio recording file is emptied when ending the program

[vuott at tutanota.com]

Hello Claus,
I suppose only Minisini can solve this question.
Considering the pipeline you mentioned, you could in the meantime use external GStreamer functions in Gambas, ......but I don't think that's what you want.  :-D

Private bo As Boolean
 
 
Library "libgstreamer-1.0"
 
Private Enum GST_STATE_VOID_PENDING = 0, GST_STATE_NULL, GST_STATE_READY, GST_STATE_PAUSED, GST_STATE_PLAYING
Private Const GST_FORMAT_TIME As Integer = 3
 
<FONT Color=gray>' ''gst_init (int *argc, char **argv[])''
' ''Initializes the GStreamer library, setting up internal path lists, registering built-in elements, and loading standard plugins.''</font>
Private Extern gst_init(argc As Pointer, argv As Pointer)
 
<FONT Color=gray>' ''GstElement * gst_parse_launch (const gchar *pipeline_description, GError **error)''
' ''Create a new pipeline based on command line syntax.''</font>
Private Extern gst_parse_launch(description As String, GError As Pointer) As Pointer
 
<FONT Color=gray>' ''GstStateChangeReturn gst_element_set_state(GstElement *element, GstState state)''
' ''Sets the state of the element.''</font>
Private Extern gst_element_set_state(gstelement As Pointer, state As Integer) As Integer
  
<FONT Color=gray>' ''gboolean gst_element_query_position (GstElement *element, GstFormat format, gint64 *cur)''
' ''Queries an element for the stream position in nanoseconds.''</font>
Private Extern gst_element_query_position(gstelement As Pointer, gstformat As Pointer, cur As Pointer) As Boolean
 
<FONT Color=gray>' ''void gst_object_unref(gpointer object)''
' ''Decrements the reference count on object.''</font>
Private Extern gst_object_unref(gobject As Pointer)
 
 
Public Sub Main()
  
  Dim audio As Pointer
  Dim tempus As Long
      
  gst_init(0, 0)
   
audio = gst_parse_launch("gst-launch-1.0 uridecodebin uri=http://icecast.ndr.de/ndr/ndrinfo/schleswigholstein/mp3/128/stream.mp3 ! audioconvert ! tee name=radio ! queue ! autoaudiosink radio. ! queue ! lamemp3enc target=bitrate bitrate=128 cbr=true ! filesink location=/tmp/output.mp3", 0)
        
  gst_element_set_state(audio, GST_STATE_PLAYING)
   
  While Not bo
    gst_element_query_position(audio, GST_FORMAT_TIME, VarPtr(tempus))
    Write "\rTimelapsed: " & Str(Time(0, 0, 0, tempus / 1000000))   '  Ruit hora !
    Flush
    Wait 0.01
  Wend
 
<FONT Color=gray>' ''Stop recording MP3 file:''</font>
  gst_element_set_state(audio, GST_STATE_NULL)
  gst_object_unref(audio)
  Print "\nRecording completed."
  Quit
 
End
  

Public Sub Application_Read()  ' By clicking the "Enter" key on your keyboard, you stop the recording
 
  bo = True
 
End






16 gen 2024, 15:11 da claus.dietrich at freenet.de:

> Am 16.01.24 um 12:22 schrieb vuott---      via User:
>
>>
>> The reason remained a mystery to me as well.
>>
>> I solved this problem, which occurs when recording        audio or even when converting from one audio format to another,        through the use of a temporary support file, as can easily be        seen on these two pages of the Italian wiki that I wrote.
>>
>> https://www.gambas-it.org/wiki/index.php/Riproduzione_e_contemporanea_registrazione_dell%27audio_di_radio_WEB_mediante_il_Componente_gb.media
>>
>> https://www.gambas-it.org/wiki/index.php/Convertire_i_formati_audio_mediante_il_Componente_gb.media
>>
>
> When I use an according GStreamer CLI-command and end the process      with Ctrl-C the mp3 file is not emptied:
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> gst-launch-1.0 uridecodebinuri=> "http://icecast.ndr.de/ndr/ndrinfo/schleswigholstein/mp3/128/stream.mp3" <http://icecast.ndr.de/ndr/ndrinfo/schleswigholstein/mp3/128/stream.mp3>>  ! audioconvert ! tee name=radio ! queue ! autoaudiosink radio. !      queue ! lamemp3enc target=bitrate bitrate=128 cbr=true ! filesink      location="/home/claus/output.mp3
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> Before using workarounds I wanted to ask, whether there are      standard means to accomplish the same in Gambas.
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> Best regards
>
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> Claus
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