[gst-devel] rtspsrc can't connect to network camera

[Marco Ballesio]

On 12/8/10, Kocsis Tibor <ikt011 at gmail.com> wrote:
> Hi,
>
> I used a very simple pipeline:
> gst-launch rtspsrc location="..." ! fakesink sync=true
>
> As far as I know this means that the negotiation problem is at one of
> the rtspsrc's elements:

that may not be true. A caps negotiation issue may trigger an error
from the source element as the one you're seeing.

I suggest you to add the -v option o gst-launch in order to see how
the negotiations occur.

Regards

>
> 0:00:02.857172483  7086  0x9ab0800 DEBUG                rtspsrc
> gstrtspsrc.c:6074:gst_rtspsrc_handle_message:<rtspsrc0> combined
> flows: not-linked
> ERROR: from element
> /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc0: Internal
> data flow error.
> Additional debug info:
> gstbasesrc.c(2563): gst_base_src_loop ():
> /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc0:
> streaming task paused, reason not-linked (-1)
>
> I'll make a test tomorrow with playbin2, but I guess the result will
> be the same as above.
>
> Regards
> Tibor
>
>
>
> On Wed, Dec 8, 2010 at 3:52 PM, Marco Ballesio <gibrovacco at gmail.com> wrote:
>> Hi,
>>
>> On Wed, Dec 8, 2010 at 4:08 PM, Kocsis Tibor <ikt011 at gmail.com> wrote:
>>> Hi,
>>>
>>> I have a network camera and i wan't to use rtspsrc to watch live, but
>>> it can't connect to the camera. The last few lines are the following
>>> before I have the "not linked (-1)" error message:
>>
>> it appears some of the elements in the pipeline are not negotiating
>> proper caps. Maybe you're just missing an ffmpegcolorspace element
>> between the video decoder and the sink, maybe the pipeline is
>> completely wrong or maybe you're missing a plugin, but you should get
>> an explicit message from gst-launch in such a case -if you're using
>> gst-launch-.
>>
>> You can understand more about caps negotiation adding the -v
>> command-line option to gst-launch.
>>
>> ..snip..
>>
>>>
>>> VLC and mplayer can work with the camera, only gstreamer fails. It is
>>> possible to have some problem with the "PT 100"? For h264 the payload
>>
>> all the dynamic payload types are supported as specified in rfc1890,
>> table 2. The value "100" does not have any particular meaning wrt
>> that.
>>
>>> is usually 96, but this camera sends the following sdp back:
>>>
>>>  medias:
>>>  media 0:
>>>   media:       'video'
>>>   port:        '0'
>>>   num_ports:   '4294967295'
>>>   proto:       'RTP/AVP'
>>>   formats:
>>>    format  '100'
>>>   information: '(NULL)'
>>>   bandwidths:
>>>    type:         'AS'
>>>    bandwidth:    '1800'
>>>   key:
>>>    type:       '(NULL)'
>>>    data:       '(NULL)'
>>>   attributes:
>>>    attribute 'framerate' : '12.5'
>>>    attribute 'quality' : '8'
>>>    attribute 'control' : 'trackID=1'
>>>    attribute 'rtpmap' : '100 H264/90000'
>>>    attribute 'fmtp' : '100 profile-level-id=42e01f; Reso=320:240;
>>> Scanning=0; TVSystem=pal; CameraMode=standard; BitRateMode=vbr;
>>> Gop=30; AspectRatio=4:3; packetization-mode=1;
>>> sprop-parameter-sets=Z0LwFJGwUH7AW4KAgKAAAH0gAAw1EIAAAAAAAAA=,aM44gA=='
>>>  media 1:
>>>   media:       'data'
>>>   port:        '0'
>>>   num_ports:   '4294967295'
>>>   proto:       'RTP/AVP'
>>>   formats:
>>>    format  '111'
>>>   information: '(NULL)'
>>>   key:
>>>    type:       '(NULL)'
>>>    data:       '(NULL)'
>>>   attributes:
>>>    attribute 'rtpmap' : '111 octet-stream/1'
>>>    attribute 'fmtp' : '111 Mac=08007b889ebe; Model=VCC-HD2300P;
>>> TargetBitRate=900; FirmVer=010103; CameraSeries=2;'
>>
>> Nothing awfully wrong here imo. Can you post the pipeline you're
>> using? Have you tried with a simple:
>>
>> gst-launch playbin2 uri=rtsp://camera_address
>>
>> ?
>>
>> Regards
>>
>>>
>>>
>>> Any ideas?
>>>
>>> Thanks
>>> Tibor
>>>
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