[pulseaudio-discuss] combined sink does not work with pulseaudio-dlna

[Georg Chini]

On 16.02.2017 11:50, Tanu Kaskinen wrote:
> On Wed, 2017-02-15 at 17:25 +0100, Ivan Kanis wrote:
>> The author of the dlna plugin has told me that the combined sink feature
>> is not implemented in his module. He has given me an alternative with
>> the loopback module:
>>
>> load-module module-loopback sink=alsa_output.pci-0000_00_1b.0.analog-stereo
>>
>> Then pickup the loopback on the Chromecast. It works but, as expected,
>> it is not in sync.
> So the source of the loopback is the monitor source of the chromecast sink?
>
>> I am now looking for a way to delay the local playback but I can't
>> figure out how.
>>
>> I tried latency_msec=3000 but it set's the latency on the Chromecast.
> If the source of the loopback is the monitor source of the chromecast
> sink, increasing the latency of the loopback module should increase the
> latency of what is played to the alsa sink, not the chromecast sink.
>
> It's a known problem that something is wrong in module-loopback related
> to the latency_msec paramter:
> https://bugs.freedesktop.org/show_bug.cgi?id=80770
>
> The loopback patches that Georg Chini submitted recently probably fix
> the latency_msec parameter behaviour.
>
The bug Tanu is referring to should already have been fixed with
pulseaudio 10.0, although with the loopback module of 10.0 it will
take quite a while until it has adjusted to the correct latency.
You can check the latency of module-loopback if you enable debug
logging.

Regards
              Georg