Bug 65314

Summary: raop module stutters a bit, very heavily on FLAC
Product: PulseAudio Reporter: Christopher Thielen <christopher>
Component: modulesAssignee: pulseaudio-bugs
Status: RESOLVED MOVED QA Contact: pulseaudio-bugs
Severity: normal    
Priority: medium CC: lennart
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description Christopher Thielen 2013-06-03 20:24:27 UTC
I set up a PA sink for my Airport Express and set my PA output to that sink. When I use Rhythmbox to playback sound, MP3s generally sound great and don't or barely stutter, however, FLAC files stutter heavily.

I checked and my CPU still had about 80% idle, so I don't think it's a decoding issue.

I also regularly stream from a Macbook and iPhone to this Airport device from the same distance, so I don't think it's a wi-fi issue, though my laptop could have an older chipset.

Does the RAOP module send MP3 data or decoded PCM data? AFAIK, RAOP streams in ALAC format, so it doesn't make sense that this issue would be occurring.

I understand this may be a Rhythmbox issue but wanted to rule out the hard stuff (RAOP, PA) first.

Thanks for your advice, feedback!
Comment 1 Arun Raghavan 2013-06-04 02:43:22 UTC
Does playback work normally to your local sound card? The RAOP module sends out PCM, so the file format being played should not matter.
Comment 2 Christopher Thielen 2013-06-04 07:40:36 UTC
Yes, it plays without issue on my local sound card.

Playback over RAOP stutters or skips about once every 2-3 seconds.

Though ntop indicated the throughput issue shouldn't be a problem, I hooked my laptop and the Airport Express up via ethernet to eliminate that issue and it still stuttered.
Comment 3 GitLab Migration User 2018-07-30 10:19:53 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/349.

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