https://bugs.freedesktop.org/show_bug.cgi?id=62636
Priority: medium
Bug ID: 62636
CC: [email protected]
Assignee: [email protected]
Summary: SAP announcements contain wrong information
QA Contact: [email protected]
Severity: normal
Classification: Unclassified
OS: All
Reporter: [email protected]
Hardware: Other
Status: NEW
Version: unspecified
Component: modules
Product: PulseAudio
Created attachment 76905
--> https://bugs.freedesktop.org/attachment.cgi?id=76905&action=edit
python script to listen to SAP announcements from PulseAudio.
I set up two Ubuntu machines, both with PulseAudio.
In one machine (Ubuntu 12.04), I set it up to act as a network audio device. In
the other machine (Ubuntu 12.10), I set it up to use the network audio device.
I took a tcpdump of the traffic going between the two computers. I extracted
the PCM audio. I was unable to play it with the parameters from the SAP
announcement, which are as follows. The garbled characters were also there in
the announcement. I captured the SAP announcement using a small python script
(attached).
u]
�kapplication/sdpv=0
o=william 3572777767 0 IN IP4 192.168.1.23
s=PulseAudio RTP Stream on william-X101CH
c=IN IP4 224.0.0.56
t=3572777767 0
a=recvonly
m=audio 46194 RTP/AVP 10
a=rtpmap:10 L16/44100/2
a=type:broadcast
When I played back the audio I extracted from the tcpdump, I was able to play
it like this. As you can see, the parameters are quite different from the SAP
announcements.
aplay -t raw -c 2 -f S32_LE -r 44100 myrawaudio.dat
(The parameters from the SAP announcement just caused it to play white noise.)
--
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
_______________________________________________
pulseaudio-bugs mailing list
[email protected]
http://lists.freedesktop.org/mailman/listinfo/pulseaudio-bugs
