[Live-devel] Stream to LAN: maximize Quality, minimize Latency

[henniman]

Hi all, 

i recently interated live into my application
as was amazed how simple and robust it is.
now i want to stream live-generated images over a LAN
with maximal quality and minimal latency. 
I have a RGBA image source, and i have an ffmpeg 
encoder to compress the video so far. 

Right now i can stream mpeg-2 with ffmpeg settings 

float video_qscale = 1.0; 
vcodec->gop_size = 0; 
vcodec->flags |= CODEC_FLAG_QSCALE; 
v_codec->global_quality = _video_st->quality = FF_QP2LAMBDA * video_qscale;


this should create only intraframes. As a receiver i use VLC 1.05 with
reduced cache ( 200 ms ) 
My results are: very good image quality but non-fluent playback. 
Every 1-2 seconds, there is a stutter/hang of 3-6 frames even 
when streaming from app to app at the same machine. Increasing VLC 
cache time does not change behaviour. Is it possible that there are 
non-continous timestamps somewhere?

What would be the best strategy to create the best possible videostream? 
Network bandwidth is not so much an issue - a gigabit connection is
available.

1) what is the best codec ( quality, encoding speed ) 
2) best codec options ( only i-frames ) 
3) best receiver - can i get advantages over eg. VLC if i re-implement the
receiver on my own? 


Best regards, hendrik 
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my live555 id
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