[gstreamer-bugs] [Bug 349781] New: Simultanious playback/record not synced properly and playback starts after alsasrc capture offset

[GStreamer (bugzilla.gnome.org)]

Do not reply to this via email (we are currently unable to handle email
responses and they get discarded).  You can add comments to this bug at
http://bugzilla.gnome.org/show_bug.cgi?id=349781
 GStreamer | don't know | Ver: HEAD CVS

           Summary: Simultanious playback/record not synced properly and
                    playback starts after alsasrc capture offset
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: don't know
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: gnome at jonobacon.org
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: 2.13/2.14
   GNOME milestone: Unspecified


Please describe the problem:
I have a pipeline that plays back audio as well as recording audio (the
recorded audio is not played back). The problem is that the recorded audio has
a noticable lack of sync with the playback audio.

As an example, if my playback audio has a solid beat and when I record I tap
the mic to the beat, the recorded audio beats are a little late and not synced.
This can be demonstrated in Jokosher at the moment (0.1 and HEAD).

I spoke to thaytan about this and he thinks it could be that the alsasrc has a
clock for the pipeline, but it needs to capture samples before the clock can
sync with the playback bin. The problem is that the playback bin starts playing
back ater this initial capture period, thus creating a delay. GStreamer should
really auotmatically account for this offset.

Steps to reproduce:
1. 
2. 
3. 


Actual results:


Expected results:
Recorded audio should play back in sync with the original playback audio.

Does this happen every time?
Yes.

Other information:


-- 
Configure bugmail: http://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.