multiple input files with input selector

[Sebastian Dröge]

On Tue, 2016-11-08 at 02:15 -0800, userAr wrote:
> Hi, 
> 
> I read about the input-selector and I guess it what my application needs:
> 
> I have n audio files, they should be played in a roll (file_1, file_2,
> file_3,... file_n) without any noticeable delay.
> 
> the pipeline is- filesrc location=file_1.mp3 ! decodebin ! audioconvert !
> autoaudiosink
> 
> at the beginning, the bus got the EOS and the action was: 
> 
> gst_element_set_state(pipeline, GST_STATE_READY);
> g_object_set(G_OBJECT(fileSrc), "location", "file_2.mp3", NULL);
> gst_element_set_state(pipeline, GST_STATE_PLAYING);
> g_main_loop_run(loop);
> 
> which worked, but with delay of ~0.3 sec and its not good enough .
> 
> so I though of using the input-selector,  but I understand from  this pot:
> 
> http://gstreamer-devel.966125.n4.nabble.com/Using-input-selector-td4664707.html
> 
>  that "the switch is not simultaneous—even though I'm switching the audio
> selector first, the audio switch is late by half a second"
> 
> so my question is, if there is some method to switch between inputs (#n
> fileSrc) to one output- the rest of the pipeline, with unnoticeable delay.

You would have to reduce buffering everywhere for that, or do the
switching at the soundserver or driver level.

Each audiosink has a buffer, and if you put the input-selector after
the decoder then that will be where the delay comes from in your
pipeline.

-- 
Sebastian Dröge, Centricular Ltd · http://www.centricular.com
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