mixing text spoken streams and white noise

[Stefan Kost]

On 11.05.2011 11:32, Andrea König wrote:
> Hi all,
> I want to mix text spoken streams with white noise stream. For all streams I
> created wav files and try to mix the files. The pipeline is configured as
> followed:
>
> gst-launch.exe adder name=mix ! audioconvert ! lamemp3enc ! filesink
> location="C:/tmp/result.mp3"  filesrc location="C:/tmp/tmp_audio_2.wav" !
> wavparse ! audioconvert ! mix. filesrc location="C:/tmp/whiteNoise-2db-5s.wav"
> ! wavparse ! audioconvert ! mix.
>
> I get the error
> /GstPipeline:pipeline0/GstWavParse:wavparse0:
> streaming task paused, reason not-linked (-1)
> ERROR: pipeline doesn't want to preroll.

Make sure all source files have the same format. You can ensure that by
adding capsfilter between audioconvert and mix.

fmt="audio/x-raw-int,channels=2,rate=44100,width=16,depth=16"
gst-launch.exe adder name=mix ! audioconvert ! lamemp3enc ! filesink
location="C:/tmp/result.mp3" filesrc  location="C:/tmp/tmp_audio_2.wav"
! wavparse ! audioconvert ! $fmt ! mix. filesrc
location="C:/tmp/whiteNoise-2db-5s.wav" ! wavparse ! audioconvert ! $fmt
! mix.

Stefan
> If I mix to text spoken wav files - the white noice file replaced by a text
> spoken wav the pipeline works fine.
>
> Is there anybody could give a hint?
>
> Best regards
>
> Dr. Andrea König
> (Teamleiter Entwicklung)
>
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