Help with Gstreamer and RTSP with Axis Camera

[Tom Hendrick]

I tried:

 gst-launch rtspsrc location=rtsp://192.168.0.90/mpeg4/media.amp ! rtpmp4vdepay ! filesink=txcap.ts

and I didn't get the link error and it saved to a file.

When I try to play it with gstreamer using: 

gst-launch playbin uri=file://txcap.ts, or gst-launch-0.10 playbin2 uri=file://txcap.ts, 

it plays too fast and the lower half of the each frame has some weird block distortions.

When I do:
mplayer txcap.ts  it also plays too fast but I don't see the weird block distortions on the lower left half of each frame, but when I do mplayer -fps 1 txcap.ts it plays fine.


When I do gst-launch playbin uri=rtsp://192.168.0.90/mpeg4/media.amp  it shows the video feed just fine without that distotion in the lower half.  I'd like to make the saved file work with gstreamer because I had some cache problems with mplayer on the receiver in the past.

Could it have anything to do with the fact Axis uses MPEG-ES formats? 
Any other ideas?

Thanks
Tom

--- On Sat, 4/9/11, Tom Hendrick <sdtom182 at yahoo.com> wrote:

From: Tom Hendrick <sdtom182 at yahoo.com>
Subject: Re: Help with Gstreamer and RTSP with Axis Camera
To: t.i.m at zen.co.uk, "Discussion of the development of and with GStreamer" <gstreamer-devel at lists.freedesktop.org>
Date: Saturday, April 9, 2011, 5:13 PM

Thanks Tim,

I can see a live feed from the Axis camera when I do:

gst-launch-0.10 playbin2 uri=rtsp://192.168.0.90/mpeg4/media.amp


I can't figure out how to modify my transmit and receive commands given that I need to depay.  I've read up on the gstreamer site and checked other forums but still can't figure it out.   When I do "gst-launch rtspsrc location=rtsp://192.168.0.90/mpeg4/media.amp !     rtpmp4gdepay ! filesink=txcap.ts" I get an error saying "streaming task paused, reason not-linked (-1)".  


Do you know how I would modify them, here they are again?

gst-launch rtspsrc location=rtsp://192.168.0.90/mpeg4/media.amp !  filesink=txcap.ts

gst-launch playbin uri=file://txcap.ts

Thanks
Tom


--- On Sat, 4/9/11, Tim-Philipp Müller
 <t.i.m at zen.co.uk> wrote:

From: Tim-Philipp Müller <t.i.m at zen.co.uk>
Subject: Re: Help with Gstreamer and RTSP with Axis Camera
To: gstreamer-devel at lists.freedesktop.org
Date: Saturday, April 9, 2011, 10:49 AM

On Fri, 2011-04-08 at 19:12 -0700, Tom Hendrick wrote:

Hi,

> 
> As a quick test, I am (..) just trying the following:
> 
> Transmitter :
> -------------------
> gst-launch rtspsrc location=rtsp://192.168.0.90/mpeg4/media.amp !
> filesink=txcap.ts
> 
> I let this run for 20 seconds and control ^C out of it.
> 
> Receiver:
> -------------
> gst-launch playbin uri=file://txcap.ts
> 
> 
> The problem is that when I run the gst-launch playbin=file://txcap.ts
> the video file
 plays very fast and then closes.  The quality also
> doesn't look as good as when I use "vlc
> rtsp://192.168.0.90/mpeg4/media.amp"
> 
> I'm a beginner with gstreamer so I'm not sure how to modify the
> transmit and receive command lines to properly set the frame rate,
> codec, etc.  Also another problem is that I want to see this live on
> the receiver, so setting gstreamer to run for a specified amount of
> time so that the header is written properly will not allow me to see
> this real-time on the receive side.  Any suggestions?
> 

This works I presume:

 gst-launch-0.10 playbin2 uri=rtsp://192.168.0.90/mpeg4/media.amp

?

Note that rtspsrc outputs RTP packets, which you need to depayload using
an appropriate depayloader (rtpmp2tdepay? rtpmp4gdepay? rtpmp4vdepay?).

Writing RTP packets to file like you do now is not going to work.


 Cheers
  -Tim

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