Audio lags in aSPICE client while using gstreamer framework
Ritesh Prajapati
ritesh.prajapati at slscorp.com
Wed Jul 6 05:09:26 UTC 2016
Hi All,
I am working on one of our product in which android 4.4 Kitkat is
running. We have one application called it as *SPICE client* which runs
on our product and is used to capture Audio+Video data streamed over
network from SPICE server which is installed into Ubuntu 16.04 Server.
We are using SPICE client gtk based topology in which *Gstreamer
Framework 1.0 *is used.
We are facing one audio sync issue like when Streaming process of
Audio+Video are started from SPICE server side at that time we are
getting video data perfectly but not getting audio data in sync compared
to video frames and are dropped for some initial durations. so, it seems
like *Audio data is not synced or is lagged* compare to video data at
that time.
Please find following code snippet of Gstreamer Pipeline we have
configured and used in our SPICE client android code.
> #ifdef WITH_GST1AUDIO
> g_strdup_printf("audio/x-raw,format=\"S16LE\",channels=%d,rate=%d,"
> "layout=interleaved", channels, frequency);
> #else
> g_strdup_printf("audio/x-raw-int,channels=%d,rate=%d,signed=(boolean)true,"
>
> "width=16,depth=16,endianness=1234",
> channels, frequency);
> #endif
> gchar *pipeline = g_strdup (g_getenv("SPICE_GST_AUDIOSINK"));
> if (pipeline == NULL)
> pipeline = g_strdup_printf("appsrc is-live=1
> do-timestamp=1 format=time min-latency=0 caps=\"%s\" name=\"appsrc\" ! "
> "audioconvert ! audioresample !
> autoaudiosink name=\"audiosink\"", audio_caps);
Also, we are getting below warning message sometimes from Android
Gstreamer Studio.
*gstaudiobasesink.c:1807:gst_audio_base_sink_get_alignment:<audiosink-actual-sink-opensles>
Unexpected discontinuity in audio timestamps of -0:00:00.076145124,
resyncing
* Please let me know if anyone has any idea or clue to debug or solve
this type of issue.
--
Regards,
Ritesh Prajapati,
System Level Solutions (India) Pvt.Ltd.
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