On 06/06/2016 05:59 PM, Tanu Kaskinen wrote:
On Mon, 2016-06-06 at 11:20 +0200, Christian Glodt wrote:
Hi,
I'm trying to do the following with a 7.1 surround sound signal:
- play the front-center channel on the left and right channels of a HDMI
output
- stream the 6 {front,side,rear}-{left,right} channels to another system
- (I'm ignoring the lfe channel for now)
The hardware setup is this:
- A Micro-PC running Kodi connected to a TV (which will also act as
center speaker).
- A server system hooked up to audio outputs and amplifiers that drive 6
ceiling-mounted speakers.
I will call the Micro-PC "Client", and the Server "Server" in the
following description.
Please note that the server system plays audio fine on the speakers
using MPD. I'm also not too concerned with the exact channel mappings at
the moment.
I'm running Ubuntu 16.04 on both systems (Pulseaudio package version
1:8.0-0ubuntu3).
I've tried several different approaches to achieve the streaming of the
6 channels from the client to the server system. None of them work so
far, in fact I mostly get failed assertions.
I'd be very glad if someone could point me in the right direction.
The tunnel crashes can be fixed by applying these two patches:
https://lists.freedesktop.org/archives/pulseaudio-discuss/2015-January/022881.html
https://lists.freedesktop.org/archives/pulseaudio-discuss/2015-January/022882.html
Thanks a lot, these patches fix the tunnel-sink problem for me! I
applied them to Ubuntu's 1:8.0-ubuntu3 package. In order to get it to
compile, I had to add the "pa_rtpoll_quit()" function back again. It
works now, using a tunnel-sink-new and a combine-sink (1st approach
described in my initial email).
I hope these patches get applied upstream - without them Pulseaudio is
broken for a great many use cases.
The rtp crash is something else. If you know how to get backtraces with
gdb, a bug report in bugzilla with a backtrace would be helpful.
Unfortunately I've already spent far too much time on this problem, so I
won't be able to delve any deeper into the RTP crash, as I'm not
planning to use RTP now. It does seem easy enough to replicate for
anyone interested.
Thanks a lot and best regards,
Christian Glodt
--
Tanu
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