[FFmpeg-devel] [PATCH] zmq filters

Stefano Sabatini stefasab at gmail.com
Sat May 11 14:46:24 CEST 2013

On date Friday 2013-05-10 12:04:37 +0200, Stefano Sabatini encoded:
> On date Wednesday 2013-04-24 17:35:51 +0200, Nicolas George encoded:
> > Le tridi 3 floréal, an CCXXI, Stefano Sabatini a écrit :
> > > I can't honestly say, but at least it seems deployed in Debuntu, and
> > > the library itself looks cool and slick. It has a simple and flexible
> > > API, with lots of high level bindings which makes it particularly
> > > suited for scripting. See in attachment a C client application I'm
> > > using to test the filter (which I can eventually clean and put in
> > > tools in the same commit).
> > 
> > I am afraid that a library that is too obscure will only bitrot.
> > 
> > > I opted for 3.2 because I was following the official tutorial and the
> > > previous API seems a bit more complex. I can switch back to the 2.x
> > > (incompatible) API.
> > 
> > If the 2.x series is really incompatible, then I believe you were right to
> > choose the most recent and simplest one.
> > 
> > >     zmq_connect(requester, "tcp://localhost:5555");
> > 
> > Is there any access control possible? If not, that limits the usability a
> > lot.
> Updated.
> Still missing: message API?
> Also check the communication "protocol", please suggest if you have
> better ideas (but we could break-extend it later, or add support to
> versioning).
> The zmqshell.c patch depends on the av_dynarray_alloc_elem() patch. I
> don't know if we should drop the C client in favor of the python
> version (which would need to be extended, e.g. to make the bind
> address configurable).

Updated with message API. I'm assuming that the client will always
send a single message containing all the command, in order to avoid
more complications.

I also added a zmqsend.c tool, which can be used in scripts, and in
general seems more useful than zmqshell.c, especially considering that
zmqshell is already implemented in a Python script. Thus I think I'll
just drop zmqshell.c in favor of zmqsend.c, and let Clement improve
his zmqshell script.
FFmpeg = Foolish Friendly Martial Powerful Epic Gadget
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