[FFmpeg-user] reduce laltency when streaming udp multicast

Carl Eugen Hoyos cehoyos at ag.or.at
Tue Apr 16 11:26:30 CEST 2013

Jacobs <jacobhameiri <at> gmail.com> writes:

> I am streaming a raw rgb live video via multicast 
> using mpegts, currently I have a 1-2 seconds delay 
> what can I do to reduce this delay ?

> /bin/ffmpeg -an -f rawvideo -vcodec rawvideo 
> -s 800x1280 -pix_fmt rgba -r 9 -i -

It is possible that -probesize and -analyzeduration 
help for your problem (I don't know).

> -vcodec mpeg4 -preset ultrafast -tune zerolatency

ultrafast and zerolatency have no effect on mpeg4 

Some of your configure flags are default flags and 
have no effect:

That makes me wonder why you are using these options:
-mfloat-abi=softfp -mfpu=neon -mfpu=vfpv3-d16

Carl Eugen

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