[gst-devel] Problem with rtpbin usage

[Tiago Katcipis]

Im not quite sure, but i think rtpbin was not supposed to be used anymore,
you should use gstrtpbin:

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-gstrtpbin.html

the pipe would be like:

"gst-launch-0.10 filesrc
location=/home/amit/Test_streams/mono/test1_44kHz_longmono.pcm !
myaacencoder samplerate=44100 ! audio/mpeg, mpegversion=4, channels=1,
rate=44100 ! rtpmp4gpay ! application/x-rtp, media=audio, payload=127,
encoding-name=MPEG4-GENERIC, mode=AAC-hbr ! gstrtpbin ! udpsink host=
10.60.5.78:5000 port=5000"

gstrtpbin does not send the data for you, but does the rest of the magic
:-).

Best regards,
Katcipis


On Thu, Aug 5, 2010 at 6:24 AM, <amitpandya at itimes.com> wrote:

> Hi all,
>
> I am working on aac streaming application.
> I am using "udpsink" to stream the aac frames with the following pipeline,
>
> "gst-launch-0.10 filesrc
> location=/home/amit/Test_streams/mono/test1_44kHz_longmono.pcm !
> myaacencoder samplerate=44100 ! audio/mpeg, mpegversion=4, channels=1,
> rate=44100 ! rtpmp4gpay ! application/x-rtp, media=audio, payload=127,
> encoding-name=MPEG4-GENERIC, mode=AAC-hbr ! udpsink host=10.60.5.78
> port=5000"
>
> I am able to playback the stream on VLC player without any problem with
> corrrect timestamp.
> My input stream is 45 Seconds long and VLC is showing stream info as below,
> Decoded blocks/played buffers = 1954
> In this case the pipline gives the "Execution ended after 45396547000 ns."
>
> In same pipeline if i use rtpbin for streaming instead of udpsink using
> following pipeline,
>
> "gst-launch-0.10 filesrc
> location=/home/amit/Test_streams/mono/test1_44kHz_longmono.pcm !
> myaacencoder samplerate=44100 ! audio/mpeg, mpegversion=4, channels=1,
> rate=44100 ! rtpmp4gpay ! application/x-rtp, media=audio, payload=127,
> encoding-name=MPEG4-GENERIC, mode=AAC-hbr ! rtpbin destinations=
> 10.60.5.78:5000 localport=5000"
>
> pipeline is running much much faster and VLC is not able to play the full
> stream.
> In this case VLC is only playing 8 seconds stream with stream info as
> below,
> Decoded blocks/played buffers = 357
> In this case the pipline gives the "Execution ended after 4266499000 ns."
>
> In both the case their is no buffer lost.
> But if you notice, pipeline Execution time in case of "rtpbin" is around 10
> times faster  than in the case of "udpsink" (45396547000 ns is aroung 10
> times more than 4266499000 ns)
> Can anyone tell me why i am getting such behavior?what diffrence it will
> make in streaming if rtpbin is used instead of udpsink?
>
> I tried putting "queue" in between the pipeline but same problem is their.
> Do I need to slow down the pipeline processing by putting the delay(sleep)
> in either "aacencoder" or in  "packetizer"?
> If yes how can i calculate the exact delay required for diffrent
> sample-rate aac streams?
>
> Any help will be very much appreciated.
>
> Thanks.
>
>
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