| Summary: | SAP announcements contain wrong information | ||
|---|---|---|---|
| Product: | PulseAudio | Reporter: | William Smith <wrsmith> |
| Component: | modules | Assignee: | pulseaudio-bugs |
| Status: | RESOLVED MOVED | QA Contact: | pulseaudio-bugs |
| Severity: | normal | ||
| Priority: | medium | CC: | lennart, wrsmith |
| Version: | unspecified | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | python script to listen to SAP announcements from PulseAudio. | ||
Temporarily resolving to migrate to GitLab. I created the issue manually: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/557 |
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.
Created attachment 76905 [details] 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.)