by david55 » Wed Nov 07, 2012 7:11 am
There is no specific limit. The limit will be set by network bandwidth, maximum open files, CPU load etc. If it is the same message, it will be cached in RAM, so disk bandwidth should not be an issue, unless you are very tight on RAM.
Other factors will be whether on the fly transcoding is needed, and whether or not that is costly, and any licensed codecs used, in real time.