Re: [Opalvoip-user] H.264 camera

[Robert J. <ro...@vo...>]

I did briefly investigate using the H.264 stream direct from the C920 
camera, however, there are incompatibilities between what the camera 
produces and the RFC 3984 encapsulation into RTP. In particular, "slice" 
sizes for packetization mode zero. I could also not figure out how to 
force I-Frames from the camera. As is often the case, a system designed 
fro streaming does not work for videotelephony. It is not as simple as 
taking the camera output and feeding it into the sink stream.

GStreamer is supported as of Lacaille and will continue to be supported. 
However, gstreamer has it's own "quirks" and there are still a couple of 
things not yet implemented, becuase I have not yet figured out how. For 
example, handling FIR/PLI/VFU commands that force an I-Frame in the encoder.

As always, any help from anyone is always welcome!

*Robert Jongbloed*
/OPAL/OpenH323/PTLib Architect and Co-founder./
Commercial support at http://www.voxlucida.com.au

On 21/03/2014 9:13 PM, Alexander Sbitnev wrote:
> I don't think you will be able to use camera UVC h.264 stream directly
> from opal.
> Even MJPEG support is not quite perfect in opal so I normally use
> v4l2convert helper.
> Probably gstreamer code will help you to import stream into opal as it is.
> But I am not sure gstreamer support in any mature state or was it
> dropped out by Robert already.
>
> On 03/20/2014 06:05 PM, Adrian Roman wrote:
>> Hi,
>>
>> I'll be using opal with Logitech C920 cameras. According to the
>> manufacturer, the camera is H.264 capable.
>> By looking into the opal sources I learned that opal is able to get video in
>> different formats from the camera, but I don't know opal enough to figure
>> out if it would be able to get the video as a h.264 stream directly from the
>> camera driver (that is, no encoding necessary between the 'pc' connection
>> source stream and the sip conection sink stream, if it goes out as h.264).
>>
>> Is opal able to do that?
>>
>> Thank you,
>> Adrian
>>
>>
>> ------------------------------------------------------------------------------
>> Learn Graph Databases - Download FREE O'Reilly Book
>> "Graph Databases" is the definitive new guide to graph databases and their
>> applications. Written by three acclaimed leaders in the field,
>> this first edition is now available. Download your free book today!
>> http://p.sf.net/sfu/13534_NeoTech
>> _______________________________________________
>> Opalvoip-user mailing list
>> Opa...@li...
>> https://lists.sourceforge.net/lists/listinfo/opalvoip-user
>
> ------------------------------------------------------------------------------
> Learn Graph Databases - Download FREE O'Reilly Book
> "Graph Databases" is the definitive new guide to graph databases and their
> applications. Written by three acclaimed leaders in the field,
> this first edition is now available. Download your free book today!
> http://p.sf.net/sfu/13534_NeoTech
> _______________________________________________
> Opalvoip-user mailing list
> Opa...@li...
> https://lists.sourceforge.net/lists/listinfo/opalvoip-user