gst rtp caps not good?

[Markus]

Hi,

I am trying to stream  and display videotestsrc through rtp on localhost on nvidia board, my scripts give me the following error :
could not parse caps...
can someone tell me what i am doing wrong?

server:
gst-launch videotestsrc ! ffmpegcolorspace ! videoscale method=1 !  video/x-raw-yuv, width=176,height=144,framerate=25/1 ! nv_omx_h264enc ! rtph264pay pt=96 ! udpsink  host=127.0.0.1 port=5000 sync=false

client :
gst-launch udpsrc port=5000 ! rtph264depay ! decodebin ! autovideosink
[12:45] <t4nk451> gst-launch -v udpsrc port=5000 ! "application/x-rtp,media=\(string\)video,clock-rate=\(int\)90000,encoding-name=\(string\)H264,ssrc=\(guint\)2834894965,payload=\(int\)96,clock-base=\(guint\)751940475,seqnum-base=\(guint\)56645" ! rtphdepay ! nv_omx_h264dec ! ffmpegcolorspace ! nv_gl_videosink


Thank you in advance

Markus

[Carlos Rafael Giani]

Why the backslashes before the brackets? You are quoting the caps already.

Also keep in mind that the SSRC is randomly generated in this case. Try
it with rtph264pay ssrc=1 on the sender side, and ssrc=(guint)1 on the
receiver side.

> Hi,
>
> I am trying to stream  and display videotestsrc through rtp on localhost on
> nvidia board, my scripts give me the following error :
> could not parse caps...
> can someone tell me what i am doing wrong?
>
> server:
> gst-launch videotestsrc ! ffmpegcolorspace ! videoscale method=1 !
> video/x-raw-yuv, width=176,height=144,framerate=25/1 ! nv_omx_h264enc !
> rtph264pay pt=96 ! udpsink  host=127.0.0.1 port=5000 sync=false
>
> client :
> gst-launch udpsrc port=5000 ! rtph264depay ! decodebin ! autovideosink
> [12:45] <t4nk451> gst-launch -v udpsrc port=5000 !
> "application/x-rtp,media=\(string\)video,clock-rate=\(int\)90000,encoding-name=\(string\)H264,ssrc=\(guint\)2834894965,payload=\(int\)96,clock-base=\(guint\)751940475,seqnum-base=\(guint\)56645"
> ! rtphdepay ! nv_omx_h264dec ! ffmpegcolorspace ! nv_gl_videosink
>
>
> Thank you in advance
>
> Markus
>
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.n4.nabble.com/gst-rtp-caps-not-good-tp4655782.html
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[Markus]

Right, im new to gstreamer I wasnt sure about that. I changed to :

client :
gst-launch -v udpsrc port=5000 ! caps="application/x-rtp , media=(string)video, \
clock-rate=(int)90000 , encoding-name=(string)H264 , ssrc=(guint)1\
, payload=(int)96, clock-base=(guint)751940475, seqnum-base=(guint)56645" \  
! rtphdepay ! nv_omx_h264dec ! ffmpegcolorspace ! nv_gl_videosink

im getting Warning :erroneous pipeline :link without source element.

[Carlos Rafael Giani]

On 08/02/12 13:45, Markus wrote:

> Right, im new to gstreamer I wasnt sure about that. I changed to :
>
> client :
> gst-launch -v udpsrc port=5000 ! caps="application/x-rtp ,
> media=(string)video, \
> clock-rate=(int)90000 , encoding-name=(string)H264 , ssrc=(guint)1\
> , payload=(int)96, clock-base=(guint)751940475, seqnum-base=(guint)56645" \
> ! rtphdepay ! nv_omx_h264dec ! ffmpegcolorspace ! nv_gl_videosink
>
> im getting Warning :erroneous pipeline :link without source element.
>
>

You dont use "caps=" with capsfilters. You can use two approaches:

1. gst-launch -v udpsrc port=5000 ! "application/x-rtp , ...

2. gst-launch -v udpsrc port=5000 caps="application/x-rtp , ...

(note the missing "!" in option (2))

The first one uses a capsfilter after udpsrc, the second tells udpsrc to
use the specified caps for its srcpad.
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[Markus]

ok i understand that, im now using the 2nd option

I now have a linking problem: warning : erroneous pipeline : could not link udpsrc0 to rtph264depay

[Markus]

sorry i solved this, seems i had a "\" too much :)
When i launch server, pipelines are set to playing but no windows pops out to see the videosrc,


client is the same with rtph264pay ssrc=(guint)1

server  

gst-launch -v videotestsrc ! ffmpegcolorspace ! videoscale method=1 ! video/x-raw-yuv, width=320, height=240, framerate=15\1 ! nv_omx_h264enc ! rtph264pay ssrc=1 udpsink host=localhost port=5000

[Carlos Rafael Giani]

On 08/02/12 14:35, Markus wrote:

> sorry i solved this, seems i had a "\" too much :)
> When i launch server, pipelines are set to playing but no windows pops out
> to see the videosrc,
>
>
> client is the same with rtph264pay ssrc=(guint)1
>
> server
>
> gst-launch -v videotestsrc ! ffmpegcolorspace ! videoscale method=1 !
> video/x-raw-yuv, width=320, height=240, framerate=15\1 ! nv_omx_h264enc !
> rtph264pay ssrc=1 udpsink host=localhost port=5000
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.n4.nabble.com/gst-rtp-caps-not-good-tp4655782p4655788.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
> _______________________________________________
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>

I have seen similar issues in the past, and the reason was that I used
udpsink host=127.0.0.1 . Using my machine's IP address instead of
localhost solved it. I am not sure why.
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