Raw audio MPEG TS streaming

[Nicolas Dufresne]

Le 2 juil. 2017 8:00 AM, "Charles Chen - Contractor" <chchen at actiontec.com>
a écrit :

Hi Nicolas,


Thanks for the prompt reply. I am afraid we don't have option to use RTP
plugin directly because we are RTSP server application based on GStreamer's
RTSP server library (gst-rtsp-server). Our ultimate goal is to feed raw PCM
or LPCM audio into mpegtxmux and rtpmp2tpay. Currently there is no existing
plugin to connect raw PCM audio to mpegtxmux.


Gst-rtsp-server gives you complete control over the rtp payload format. Of
course, you might have other reason to use MPEG ts over RTP.


When you say PCM encoder what kind of plugin is the best to implement? Is
there a template that we could use, or can we use appsrc appsink method to
achieve this?

I meant writing an element/plugin that derives from GstAudioEncoder base
class. If I remember, lpcm have special ordering and some headers that need
to be inserted. This could also be implement directly in mpegtsmux,
considering its kind of specific.


Thanks again,

Charles



------------------------------
*From:* Charles Chen - Contractor
*Sent:* Friday, June 30, 2017 2:30:17 PM
*To:* gstreamer-devel at lists.freedesktop.org
*Subject:* Raw audio MPEG TS streaming


Hello,


How to generate mpeg TS stream (RTP payload type 33) with raw audio without
using any audio encoder such as AAC? I need to feed raw PCM audio into
mpegtsmux and RTP rtpmp2tpay. I am getting pipeline link error if I:


gst-launch-1.0 autoaudiosrc ! audioconvert ! capsfilter caps =
"audio/x-lpcm,width=16,channels=2,rate=48000" ! filesink location =
"audiofile.raw"


Looks like audio/x-lpcm is not included in the supported media type list:

https://gstreamer.freedesktop.org/documentation/plugin-
development/advanced/media-types.html

Do I have to create a new audio/x-lpcm media type? considering possible
issues to link with existing elements.


Is it feasible to create my own plugin to convert audio/x-raw to
audio/x-lpcm and then link to mpegtsmux?


Or should I use appsrc or appsink method to do that?


Thanks and appreciate any feedback.


Charles



_______________________________________________
gstreamer-devel mailing list
gstreamer-devel at lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20170702/29286892/attachment.html>