[gst-devel] Two alsasrc in the one pipeline

[Zaheer Merali]

On 7/4/07, Vitaly Mayatskih <v.mayatskih at gmail.com> wrote:
> I need to mix streams from two soundcards and mux it with some video. I have
> built a sample pipeline with one soundcard and it works fine:
>
> gst-launch -v videotestsrc num-buffers=100 ! ffmpegcolorspace !
> ffdeinterlace ! tee name="tee0" ! fakesink \
>
>     tee0. ! queue ! ffenc_h263p ! tee name="tee1" ! fakesink \
>
>
>     tee1. ! queue ! matroskamux name="mux" ! filesink location="/tmp/1.mkv"
> \
>
>     alsasrc device="hw:0" !
> "audio/x-raw-int,width=16,rate=48000,channels=2" ! adder
> name="mix" \
>
>     ! tee name="tee2" ! ffenc_ac3 ! tee name="tee3" !
> "audio/x-ac3,width=16,rate=48000,channels=2" ! mux. \
>
>     tee3. ! queue ! fakesink
>
> When I add second card (even without linking to the 'adder' element) then
> pipeline stops
>
>     alsasrc device="hw:1" !
> "audio/x-raw-int,width=16,rate=48000,channels=2" ! fakesink
>
> The error is:
>
> Setting pipeline to PLAYING ...
> 0:00:00.231934000 15579 0x804f050 WARN              pipeline
> gstpipeline.c:568:gst_pipeline_change_state:<pipeline0>
> error: Selected clock cannot be used in pipeline.
> 0:00:00.232189000 15579 0x804f050 WARN              pipeline
> gstpipeline.c:568:gst_pipeline_change_state:<pipeline0>
> error: Pipeline cannot operate with selected clock
> ERROR: pipeline doesn't want to play
>
> In my C-program I have to manually set pipeline's clock (got it from
> alsasrc) and it works, but I don't know how to work correctly with two
> alsasrcs.
>
>

Please fle a bug on bugzilla http://bugzilla.gnome.org/ and someone
will look at it.

Thanks

Zaheer