[Live-devel] how to make latency as low as possible

[Gordon Apple]

I’m currently a lurker on this list, but hope to eventually include RTSP
streaming in our educational presentation Mac app, iQPresenter. Latency is a
major factor. We currently produce movies, create HLS variants and segments
using Compressor. Talk about latency, “HLS” is a misnomer. Round trip
latency could be as much as a minute with HLS. One second might be tolerable
but I would hope for less. So we are definitely interested in what latency
can reasonably be achieved using RTSP.


On 1/11/17 5:53 AM, "xliu at vscenevideo.com" <xliu at vscenevideo.com> wrote:

> hi there,
> 
> I'm using live555 as our RTSP server on a live camera, which capture and
> encode video into H.264 stream. Everything works fine, except that the latency
> is a bit high. I tried different players, including VLC, ffplay, mplayer. The
> lowest latency is when I set -nocache to mplayer, but still it's over 1
> second. 
> 
> How should I lower the latency? Any suggestion would be appreciated.
> 
> Btw, my camera's dim is 2048x1520, frame rate is 25fps, bit rate is 8Mbps,
> encoder is H.264 without B-frame.
> 
> Thanks,
> Xin
> 
> Xin Liu
> VsceneVideo Co. Ltd.
> 
> Mobile：+86 186 1245 1524
> 
> Email：xliu at vscenevideo.com

-- 
G. Gordon Apple, PhD
Ed4U
118 Chelle Ln
Little Rock AR 72223

501-868-7637
310-766-3900 (cell)
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www.ed4u.tv


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