Problem with udpsrc in gst-rtsp-server

[Morris Ford]

This morning I cranked up my test and I was seeing about 10 second latency.
After rebooting all the systems involved I am still seeing about 7 - 8
second latency. This is really strange.

Any insight?

Morris

On Tue, Mar 1, 2011 at 8:24 AM, Morris Ford <morrishford at gmail.com> wrote:

> I get:
> (lt-test-launch:21084): GStreamer-CRITICAL **: gst_poll_set_flushing:
> assertion `set != NULL' failed
>
> Morris
>
> On Tue, Mar 1, 2011 at 3:11 AM, Marco Ballesio <gibrovacco at gmail.com>wrote:
>
>> Hi,
>>
>> On Mon, Feb 28, 2011 at 6:14 PM, Morris Ford <morrishford at gmail.com>
>> wrote:
>> > Thanks a lot for your help. That was the key to getting it to run. I now
>> > have a working rtsp-server pipe thus:
>> > ./test-launch "( udpsrc port=5000 caps=\"application/x-rtp,
>> > media=\(string\)video, clock-rate=\(int\)90000,
>> > encoding-name=\(string\)H264,  payload=\(int\)96,
>> ssrc=\(guint\)2396357661,
>> > clock-base=\(guint\)2297066863, seqnum-base=\(guint\)49439\" !
>> rtph264depay
>> > ! ffdec_h264 ! ffmpegcolorspace ! videoscale ! x264enc ! rtph264pay
>> > name=pay0 pt=96 sync=false )"
>> > Problem now is that there is a 3 - 4 second latency when playing using
>> that
>> > pipeline and playing the resulting video through vlc or quicktime.
>> > My question: How do I find what is causing the delay and what can I do
>> to
>> > reduce the delay?
>>
>> what if you don't explicitly set clock-base and seqnum-base?
>>
>> Regards
>>
>> > Thanks
>> > Morris
>> >
>> > On Mon, Feb 28, 2011 at 2:33 AM, Marco Ballesio <gibrovacco at gmail.com>
>> > wrote:
>> >>
>> >> Hi,
>> >>
>> >> On Mon, Feb 28, 2011 at 3:05 AM, Morris Ford <morrishford at gmail.com>
>> >> wrote:
>> >> > I am working on receiving an udpsrc stream and publishing it as an
>> rtsp
>> >> > stream. This gst-launch string works just fine to receive the stream:
>> >> > gst-launch-0.10 -v udpsrc port=5000 caps="application/x-rtp,
>> >> > media=\(string\)video, clock-rate=\(int\)90000,
>> >> > encoding-name=\(string\)H264,  payload=\(int\)96,
>> >> > ssrc=\(guint\)2396357661,
>> >> > clock-base=\(guint\)2297066863, seqnum-base=\(guint\)49439" !
>> >> > rtph264depay !
>> >> > decodebin ! ffmpegcolorspace ! videoscale ! xvimagesink sync=false
>> >> > but when I try to take that pipeline and put it into a test-launch, I
>> >> > get
>> >> > complaints about not being able to set the caps on udpsrc to
>> >> > application/x-rtp.
>> >> > Like this:
>> >> > ./test-launch "( udpsrc port=5000 caps="application/x-rtp,
>> >> > media=\(string\)video, clock-rate=\(int\)90000,
>> >>
>> >> It's just about bash syntax. The way you're using the " make bash
>> >> thinking you're passing test-launch a first argument like this:
>> >>
>> >> ( udpsrc port=5000 caps=
>> >>
>> >> concatenated to:
>> >>
>> >> application/x-rtp,
>> >>
>> >> and a second argument like:
>> >>
>> >> media=\(string\)video,
>> >>
>> >> useless to say this is not what you should pass to the test-launch
>> >> command. I suggest you to try replacing the outmost pair of " with '
>> >> or the innermost ones with \"
>> >>
>> >> Regards
>> >>
>> >> > encoding-name=\(string\)H264,  payload=\(int\)96,
>> >> > ssrc=\(guint\)2396357661,
>> >> > clock-base=\(guint\)2297066863, seqnum-base=\(guint\)49439" !
>> >> > rtph264depay !
>> >> > decodebin ! ffmpegcolorspace ! videoscale ! x264enc ! rtph264pay
>> >> > name-pay0
>> >> > pt=96 )"
>> >> > ** (lt-test-launch:20772): CRITICAL **: could not parse launch syntax
>> ((
>> >> > udpsrc port=5000 caps=application/x-rtp,): could not set property
>> "caps"
>> >> > in
>> >> > element "udpsrc0" to "application/x-rtp,"
>> >> > ** (lt-test-launch:20772): CRITICAL **: could not create element
>> >> > I could not find any examples of udpsrc in a test-launch line or
>> udpsrc
>> >> > in a
>> >> > gst-rtsp-server 'c' program so I am not at all sure if what I am
>> trying
>> >> > to
>> >> > do is valid.
>> >> > Morris
>> >> > _______________________________________________
>> >> > gstreamer-devel mailing list
>> >> > gstreamer-devel at lists.freedesktop.org
>> >> > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>> >> >
>> >> >
>> >> _______________________________________________
>> >> gstreamer-devel mailing list
>> >> gstreamer-devel at lists.freedesktop.org
>> >> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>> >
>> >
>> > _______________________________________________
>> > gstreamer-devel mailing list
>> > gstreamer-devel at lists.freedesktop.org
>> > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>> >
>> >
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>>
>
>
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