[gst-devel] synchronised Audio and Video in a C file

[Harvinder S. <har...@d2...>]

Hello everyone,

=20

I trying to develop an application to stream h263 video together with
amr audio, I am able to do this through the command line of GStreamer by
typing this command:

=20

gst-launch filesrc location=3Dmedia/video.3gp ! decodebin name=3Ddecoder
decoder. ! ffenc_h263 ! rtph263pay ssrc=3D-1 pt=3D34 ! udpsink
host=3D192.168.0.2 port=3D22222 decoder. ! mulawenc ! rtppcmupay =
ssrc=3D-1
pt=3D97 ! udpsink host=3D192.168.0.2 port=3D22222

or

gst-launch filesrc location=3Dmedia/video.3gp ! qtdemux name=3Ddemuxer
demuxer. ! queue ! ffdec_h263 ! ffenc_h263 ! rtph263pay ssrc=3D-1 =
pt=3D34 !
udpsink host=3D192.168.0.2 port=3D22222 demuxer. ! queue ! amrnbdec !
mulawenc ! rtppcmupay ssrc=3D-1 pt=3D97 ! udpsink host=3D192.168.0.2
port=3D22222

=20

In both the cases I am able to send both audio and video, but there is a
problem with synchronisation between the audio and video. The audio
seems to get ahead from the video with a few seconds, also the output
audio in the beginning produces some glitches. I need to be able to
receive audio and video stream from something like a 3gp or mov file,
both the streams synchronised and it would be really helpful if someone
could explain me how I can assemble it into a C file.

=20

I don't know how to progress from here and would really appreciate your
help on this, also I was wondering if it has something to do with the
rtpbin element available from the farsight gst plugins?

=20

Regards

=20

Harvinder Singh

=20

This e-mail message (including any attachment) is confidential. If you =
have received this email in error please notify the sender immediately =
and delete this email from your system without copying or disseminating =
it or placing any reliance upon its contents. Any opinions expressed in =
this email (including attachments) are those of the author only.  This =
message (including any attachments) does not create any legally binding =
rights or obligations. D2see Limited is a company registered in England =
and Wales no. 5836806. Registered Office: 10 Barley Mow Passage, London =
W4 4PH, UK. VAT registered, no. 888 1076 85.  Tel +44 20 8819 5710