http stream with big delay

[severinikos]

Dear guys,

I created and HTTP stream from my local sound card to may other PCs using VLC.

Here is my syntax:

START vlc.exe -vvv dshow:// --sout=#transcode{vcodec=none,acodec=mpga,ab=256,channels=2,samplerate=44100}:http{dst=:8080/stream.mp3} --sout-keep --live-caching 100 --network-caching 100

It works very well, except the big delay on the other PCs when playing.
Do you have any ideas how this can be improved?

Thanks.
Severin

[Jean-Baptiste Kempf]

How big?

[Rémi Denis-Courmont]

Reduce caching on the receiver.

[severinikos]

delay is around 3 seconds
I have already tried to set --live-caching 100 --network-caching 100 on the receiver, but no improvements....

[Rémi Denis-Courmont]

Well, there's also --sout-mux-caching on the server too. After that one, you will need to improve the code to further reduce latency.

[severinikos]

thanks, with --sout-mux-caching 100 the delay seems to be only 1-2 seconds any more.
I also set --live-caching 100 --network-caching 100 on the client site, but no improvements....

Any other ideas?

Thanks.

[Rémi Denis-Courmont]

As I said, you've reached the point where tuning parameters won't help. The code needs to be improved.

[severinikos]

alright, what do you suggest?

[Rémi Denis-Courmont]

Benchmarking and fixing the worse latency bottlenecks in the source code.

[kostyan]

Did you try --clock-jitter=0? Not sure if it is relevant in your case but I think that without this option, the client might increase the size of the cache dynamically.