Encoding and streaming video+audio to UDP

[Peter Maersk-Moller]

It will probably help your case if you are a little bit more detailed about
what you mean when you say quality is an issue. That doesn't tell much
about the stream. Maybe if you recorded into a file and posted a link to it
and at the same time explain what you are unhappy about wrt. quality.

So what do you by 'remain an issue' specifically mean?

Do you get good quality if you set bitrate to say 3000?

What's wrong with non square pixels as a bandwidth saver? Do you have a
faulty player that does not respect the PAR information? What does the
player do?

With 1200kbps for 700x400 at 25fps you should be able to get an okay stream if
you optimize the encoding process, but it won't be fantastic. But it also
depends on source quality and amount of movement/change.


Regards


On Wed, Jul 30, 2014 at 10:24 PM, dmitrijs2005 <dmitrijs2005 at gmail.com>
wrote:

> Now the command looks like this:
>
> gst-launch-1.0 -e \
> mpegtsmux alignment=7 name=mux ! \
> rndbuffersize max=1316 min=1316 ! \
> udpsink host=127.0.0.1 port=5000 sync=false \
> decklinksrc mode=10 name=src \
> src. ! audio/x-raw ! queue !  audioconvert ! \
> voaacenc bitrate=128 ! aacparse ! mux. \
> src. -v ! deinterlace ! videoconvert ! videorate ! videoconvert !
> videoscale
> ! videoconvert ! video/x-raw, format=\(string\)I420, framerate=25/1,
> width=720, height=400 ! aspectratiocrop aspect-ratio=16/9 ! queue !
> videoconvert ! \
> x264enc bitrate=1272 tune=zerolatency
> option-string="me=umh:direct=auto:keyint=100:scenecut=0" ! h264parse ! mux.
>
> But the picture quality remains an issue. Can something be done to improve
> it,
> without changing the resolution and bit rate, square pixel is also a
> requirement for our system. Maybe I can apply some filters?
> The source format is 1080i at 50 4:2:2, at the output I need 400p at 25 4:2:0
>
>
>
>
> --
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