[gst-devel] How to syncronize audio and video

[Zelalem Sintayehu]

Hi Thabelo, thank you for your response. BTW, my problem is not on the source side. It is on the receiver side. You know when i see the file that i saved in it is very unsynchronized. Eventually I want to use my program to save streams that are comming from the network. So, I am only intersting on the recieving side.  Anyway, I will try to use gstrtpbin if it solves the problem. BTW, how can i put the two differnet streams in teh bin?

Thank you again.

- Zelalem S. 

Date: Mon, 22 Jun 2009 12:14:41 +0200
From: thabelo at gmail.com
To: gstreamer-devel at lists.sourceforge.net
Subject: Re: [gst-devel] How to syncronize audio and video

Try using the "gstrtpbin" it works, checkout the documentation on the gstreamer site. 

eg  Your source can be something like

source -> encode -> payload -> gstrtpbin -> rtpsink(udp) 



On Mon, Jun 22, 2009 at 9:45 AM, Zelalem Sintayehu <zelalems at hotmail.com> wrote:






Hi all, I wanted to save a networked stream in an avi file and I got a very unsynchronized file.
The audio finishes almost 3 second ahead of the video. I even used the sync=true option for the filesink
element, but the result is the same. So, I want to ask an advice on how to get a synchronized video file. The following is the source and destination commands that I used:

Source commands:

for the audio channel

gst-launch-0.10
-v alsasrc ! queue ! audio/x-raw-int,rate=8000,channels=1,depth=8 !
audioconvert ! alawenc !  rtppcmapay ! queue ! udpsink port=5002
for the video channel;
gst-launch
v4l2src ! video/x-raw-rgb,width=320,height=240 ! queue ! videorate !
video/x-raw-rgb,rate=15/1 ! ffmpegcolorspace! ffenc_h263p ! rtph263ppay
! udpsink port=5000

Output command:
gst-launch-0.10 -v avimux
name=mux ! filesink location=videoandaudio.avi sync=true {udpsrc
port=5000
caps="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H263-1998"
num-buffers=5000 ! queue ! rtph263pdepay !
'video/x-h263,width=320,height=240,framerate=(fraction)25/1' ! queue} !
mux.video_0 {udpsrc port=5002
caps="application/x-rtp,media=(string)audio,payload=(int)96,
rate=(int)8000, encoding-name=(string)PCMA" ! queue ! rtppcmadepay !
'audio/x-alaw, rate=(int)8000, channels=(int)1' ! queue} ! mux.audio_0;

Do you think the result
will be different if I use a different file container (like mp4)
instead of avi? 

Thank you.

- Zelalem S. 





See all the ways you can stay connected to friends and family


------------------------------------------------------------------------------

Are you an open source citizen? Join us for the Open Source Bridge conference!

Portland, OR, June 17-19. Two days of sessions, one day of unconference: $250.

Need another reason to go? 24-hour hacker lounge. Register today!

http://ad.doubleclick.net/clk;215844324;13503038;v?http://opensourcebridge.org
_______________________________________________


gstreamer-devel mailing list

gstreamer-devel at lists.sourceforge.net

https://lists.sourceforge.net/lists/listinfo/gstreamer-devel




_________________________________________________________________
Drag n’ drop—Get easy photo sharing with Windows Live™ Photos.

http://www.microsoft.com/windows/windowslive/products/photos.aspx
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20090622/b6b19bdd/attachment.htm>