questions abount shmsrc and adder, how to avoid the critical message?

[Aleix Conchillo Flaqué]

On Sat, Jun 29, 2013 at 6:37 AM, Tim-Philipp Müller <t.i.m at zen.co.uk> wrote:
> On Sat, 2013-06-29 at 01:26 -0700, Jerry wrote:
>
> Hi,
>
>> I am using shmsrc to get the audio stream and using adder to mixer the
>> sound, and the follow is my pipeline:
>> shmsrc-->caps-->alawdec-->queue-->|
>>                                                       |-->adder-->alsasink
>> shmsrc-->caps-->alawdec-->queue-->|
>> The pipeline works,but appears this message:
>> ** (kd-svc-helper:1724): CRITICAL **: gst_audio_buffer_clip: assertion
>> `segment->format == GST_FORMAT_TIME || segment->format ==
>> GST_FORMAT_DEFAULT' failed
>> I want to avoid this message, anyone help?
>
> You could try:
>
>  gst_base_src_set_format (GST_BASE_SRC (shmsrc), GST_FORMAT_TIME);
>
> before you start the pipeline. But even then you're probably (not really
> sure) missing timestamps on the buffers. Though with alaw at least you
> have a constant bitrate, so you could use identity datarate=N where N is
> sample_rate * channels or so (IIRC).
>
> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstBaseSrc.html#gst-base-src-set-format
>

Not sure if it will be the same problem but I filed a bug for shmsrc
not setting the right mode:

https://bugzilla.gnome.org/show_bug.cgi?id=702842

Aleix