[Bug 692953] alsa modules are silent or noisy after several hours of use

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=692953
  GStreamer | gst-plugins-base | 1.0.9

--- Comment #49 from Robert Krakora <rob.krakora at messagenetsystems.com> 2013-08-23 15:29:29 UTC ---
(In reply to comment #48)
> For your information, I've launched yesterday two independent pipelines on the
> PCIe ESI Juli@ XTE soundcard :
> 
> one pipeline for alsasrc:
> "alsasrc device=hw:Juli ! capsfilter caps="audio/x-raw, format=S32LE,
> rate=48000, channels=2" ! audioconvert ! audioresample ! capsfilter
> caps="audio/x-raw, format=F32LE, rate=48000, channels=2" ! jackaudiosink
> client-name=pipeline_src sync=false connect=none"
> 
> one pipeline for alsasink:
> "jackaudiosrc client-name=pipeline_sink connect=none ! capsfilter
> caps=\"audio/x-raw, format=F32LE, rate=48000, channels=2\" ! audioconvert !
> audioresample ! capsfilter caps=\"audio/x-raw, format=S32LE, rate=48000,
> channels=2\" ! alsasink device=hw:Juli sync=false"
> 
> They are independent. They are connected with jack. I can change one without
> changing the other.
> 
> The "alsasrc ! something" had output these warning BUT HAS NOT faild:
> AVERTISSEMENT : de l'élément /GstPipeline:pipeline0/GstAlsaSrc:alsasrc0 :
> Impossible d'enregistrer assez rapidement les données audio
> Information de débogage supplémentaire :
> gstaudiobasesrc.c(848): gst_audio_base_src_create ():
> /GstPipeline:pipeline0/GstAlsaSrc:alsasrc0:
> Dropped 10240 samples. This is most likely because downstream can't keep up and
> is consuming samples too slowly.
> 14:50:41.515700033  3711  0x97f84f0 WARN            audiobasesrc
> gstaudiobasesrc.c:843:gst_audio_base_src_create:<alsasrc0> create DISCONT of
> 10240 samples at sample 2565442560
> 14:50:41.515759371  3711  0x97f84f0 WARN            audiobasesrc
> gstaudiobasesrc.c:848:gst_audio_base_src_create:<alsasrc0> warning: Impossible
> d'enregistrer assez rapidement les données audio
> 14:50:41.515785649  3711  0x97f84f0 WARN            audiobasesrc
> gstaudiobasesrc.c:848:gst_audio_base_src_create:<alsasrc0> warning: Dropped
> 10240 samples. This is most likely because downstream can't keep up and is
> consuming samples too slowly.
> 
> This pipeline is NOT silent.
> It DOES NOT need:
> pipeline_src.set_state(Gst.State.NEED)
> pipeline_src.set_state(Gst.State.PLAYING)
> to works, it works already (but perhaps can failed with more time).
> 
> The "something ! alsasink" pipeline had outputs these warnings AND HAS failed:
> 16:12:20.371744040  3687 0xb0102690 WARN            audiobasesrc
> gstaudiobasesrc.c:843:gst_audio_base_src_create:<jackaudiosrc0> create DISCONT
> of 23552 samples at sample 2800318464
> 16:12:20.371898922  3687 0xb0102690 WARN            audiobasesrc
> gstaudiobasesrc.c:848:gst_audio_base_src_create:<jackaudiosrc0> warning:
> Impossible d'enregistrer assez rapidement les données audio
> 16:12:20.371929869  3687 0xb0102690 WARN            audiobasesrc
> gstaudiobasesrc.c:848:gst_audio_base_src_create:<jackaudiosrc0> warning:
> Dropped 23552 samples. This is most likely because downstream can't keep up and
> is consuming samples too slowly.
> 
> This pipeline IS SILENT.
> It NEEDs:
> pipeline_sink.set_state(Gst.State.NULL)
> pipeline_sink.set_state(Gst.State.PLAYING)
> to works again. Sound come back after that.
> 
> This pipeline use the ESI Juli@ XTE as record interface, the prealloc is 256:
> 
> user at b $ cat /proc/asound/card2/pcm0p/sub0/prealloc
> 256
> user at b $ cat /proc/asound/card2/pcm0c/sub0/prealloc
> 256
> 
> This is software used:
> 
> user at b $ uname -s -r -v -m -o
> Linux 3.2.0-4-rt-686-pae #1 SMP PREEMPT RT Debian 3.2.35-2 i686 GNU/Linux
> 
> user at b $ /usr/sbin/alsactl -v
> alsactl version 1.0.25
> 
> user at b $ gst-inspect-1.0 alsasink | grep Version
>   Version:        1.0.9
> user at b $ gst-inspect-1.0 jackaudiosrc | grep Version
>   Version:        1.0.9
> 
> 
> Two conclusions:
> 
> ~~ 1. I don't know if the "prealloc proc file" value is related, but if it's
> related, 256 is too short.
> 
> ~~ 2. Warnings like "This is most likely because downstream can't keep up and
> is consuming samples too slowly." are unrelated.
> Some pipeline failed without this kind of warning, some pipeline don't failed
> with this kind of warning.
> 
> NB: I have no "INFO" nor "DEBUG" output on this pipelines (uses GST_DEBUG=3).

Interesting.  So, it seems that pipelines with one or the other (but not both)
alsasrc or alsasink work without failing?

-- 
Configure bugmail: https://bugzilla.gnome.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.
You are the assignee for the bug.