On fly sound latency change

[Stefan Sauer]

On 03/20/2015 05:04 PM, Henrikas Urbonas wrote:
> When you change "latency" while pipeline is running, nothing happens.
> From documentation it looks like latency can be set and have effect
> only before pipeline is in playing state.
> Because if you change latency when pipeline is in playing state it
> actually does not change the latency (we use jitter buffer).
since you've tested this, the next step would be to file a feature
request for the jitter buffer to allow dynamic latency changes.
>
> Are there other ways to change latency except using rtspsrc jitter buffer?
This is at least one of the elements that in the pipeline that introduce
latency and that can be configured. For other elements the latency might
be static.

> And why Android cannot use 48 kHz sample rate because some devices
> have lower output latency when using this (48kHz) sample rate?
I am not using gstreamer on android. You would need to start looking at
the audio source and sink elements and figure out why they won't work at
48kHz (if that is the case).

Stefan

>
> Thanks guys
>
>
> 2015-03-20 10:12 GMT+02:00 Stefan Sauer <ensonic at hora-obscura.de
> <mailto:ensonic at hora-obscura.de>>:
>
>     On 03/18/2015 05:33 PM, Henrikas Urbonas wrote:
>>     So that means to adjust it without glithces we have to write a
>>     plugin for Gstreamer?
>
>     I think most part of the latency is the buffering time (e.g. in
>     the jitter buffer). I would first try what happens if you change
>     the 'latency' parameter while the pipeline is running.
>
>     STefan
>
>>
>>     2015-03-18 18:23 GMT+02:00 Tim Müller <tim at centricular.com
>>     <mailto:tim at centricular.com>>:
>>
>>         On Wed, 2015-03-18 at 17:54 +0200, Henrikas Urbonas wrote:
>>
>>         Hi,
>>
>>         > We work on RTSP protocol and we want to dynamically change
>>         sound
>>         > latency on client side without re-initializing the
>>         pipeline, did
>>         > anyone tried it?
>>
>>         I think changing the latency on the fly at runtime should
>>         work fine
>>         already, but what we don't have yet is a way to smoothly
>>         adjust the
>>         latency over a period of time so that you can do adjustments
>>         without
>>         glitches.
>>
>>          Cheers
>>           -Tim
>>
>>         --
>>         Tim Müller, Centricular Ltd - http://www.centricular.com
>>
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>>
>>
>>
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