[gst-devel] ffmux_mp4 : audio signal not emitted

[Edward Hervey]

On Thu, 2009-02-12 at 18:11 +0530, Jyoti D wrote:
> Hi all,
> 
> I have written a application to transcode given media file to H264 and
> AAC video. The application works for most of the media files I
> checked. But in one case where the input file is mpegts with video
> content->mpeg2video and audio->mp2. The muxer doesn't emit a
> "pad-added" signal for audio stream only, it emits signal for video
> stream.

  Muxers don't create pads automatically but on request (as you're doing
below with _get_request_pad). Don't use 'pad-added' for muxers.

> 
> The error is :
> 
> ** (dec-check:30607): CRITICAL **: gst_ffmpegmux_request_new_pad:
> assertion `ffmpegmux->opened == FALSE' failed

  This means you can't request a new sink pad once the muxer is
initialized (most likely because it's already paused/playing).
  Connect all your streams to the muxer in one go, that should solve
your issue.

   Edward

> 
> I get the request pad for both video and audio pads as below. 
> 
>         mux_sinkpad = gst_element_get_request_pad (ffmux_mp4,
> "audio_0");
>         if (mux_sinkpad ==  NULL) {
>             g_print ("Error : get request pad : mux_sinkpad audio_0
> \n");
>             return;
>         }
> 
> Also I tried using the g_signal_connect (); function as below
> 
> g_signal_connect (GST_OBJECT (ffmux_mp4), "pad-added", G_CALLBACK
> (cb_newpad_mux), NULL); 
> 
> But the same error pops out. 
> 
> Could some one help me regarding this?
> 
> Thanks
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