[gst-devel] Achieving <400ms latency with x264enc

[timothe jahan]

Hi,
I am not a gstreamer expert at all but I am working quite a lot on live
streaming.
I would advice to check the buffer settings of VLC. Usually the client
always have some buffer to hide network ups and downs. A few seconds is
common.

Regards,
Timothe

On Mon, Jan 3, 2011 at 9:35 AM, Suneet Shah <suneets at gmail.com> wrote:

> Hello,
>
> I'm wondering if it is possible to achieve <400ms latency with streaming
> video using x264enc. I'm using gstreamer to stream video (server) to VLC
> (client) on another machine within the same local network.
>
> My pipeline is as follows (on the server machine):
>
> ximagesrc ! video/x-raw-rgb,framerate=10/1 ! videorate ! ffmpegcolorspace !
> videoscale method=1 ! video/x-raw-yuv,width=480,height=300,framerate=5/1 !
> x264enc byte-stream=true bitrate=195 tune=0x00000004 ! mpegtsmux !
> rtpmp2tpay ! udpsink port=1500 host=192.168.2.197
>
> Note that I'm using the tune=zerolatency (which sets several values,
> according to http://mewiki.project357.com/wiki/X264_Encoding_Suggestions)
> to achieve low latency.
>
> My client machine is simply running VLC with rtp://:1500
>
> With this setting-- I'm seeing about 2.5 seconds of latency from an action
> taken on the server to being seen in the video stream by the client.
>
> If you've achieved low latency with x264enc, can you share your settings?
>
> Thanks!
> Suneet
>
>
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