[zeromq-dev] use zeromq for pgm audio broadcast to android devices ?

Dan Reardon dtr29 at hotmail.com
Thu Jan 3 09:00:48 CET 2013

I modified my vanilla multicast transmitter to send MP3 frame-by-frame. My test file has a constant frame size of 1044,
which I add a 16 byte header to for a total payload of 1060 bytes per UDP packet. The play duration of a frame is about 
26 ms. The transmitter has no trouble keeping up. I will be building the MP3 receiver next. If I can get it working with
2 devices on a table top, I guess the next step will be testing in more realistic circumstances. Do you think it has a
good chance of working, or should I really be using OpenPGM ? Is there any difference between plain old OpenPGM 
and the version included in ZeroMQ ? Does the plain OpenPGM run on android ? Is there a JAVA binding for it ? 

> From: ph at imatix.com
> Date: Thu, 3 Jan 2013 08:15:12 +0100
> To: zeromq-dev at lists.zeromq.org
> CC: javaplusnyc at gmail.com
> Subject: Re: [zeromq-dev] use zeromq for pgm audio broadcast to android devices ?
> On Thu, Jan 3, 2013 at 6:46 AM, Dan Reardon <dtr29 at hotmail.com> wrote:
> > Are you saying it runs on android but does not support wifi ? We would be
> > talking about the udp encapsulated pgm of course.
> Indeed, encapsulated pgm will run on Android and WiFi. My mistake.
> The low bit rate is inherent in the physics of WiFi. You can configure
> some WiFi routers to use higher bit rates for broadcast/multicast but
> the result will be a smaller network. You can boost the power of some
> routers.
> If you can find the scale where multicast works (at a certain number
> of devices the low bit rate is still faster than unicasting to each
> device), then you're not barking up the wrong tree any more.
> -Pieter
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