[pjsip] 答复: video call

Gang Liu gangban.lau at gmail.com
Fri May 30 00:28:18 EDT 2014


It depends on your project requirement.  Do you need SIP protocol? Which
API level you want to use ...

you could write your own capture/render device and plug into pjmedia. take
a look pjmedia/src/pjmedia-videodev/* for reference.

regards,
Gang


On Fri, May 30, 2014 at 11:36 AM, Jason Chen 陈剑桥 <Jason.Chen at tpv-tech.com>
wrote:

>  Hi Bill and Gang
>
>
>
> thank you very much.
>
>
>
> I want to develop a video chat on android,but I do not understand the
> video flow.
>
> Can I recorded and render the video by myself, and just use the UDP Media
> Transport to deliver the video stream?
>
> Is there any API  to deliver the video stream?
>
>
>
> Or, what better way add video chat?
>
>
>
>
>
> Best Regards,
>
> jason.chen)
>
>
>
>
>
>
>
>
>
>
>
> *发件人:* pjsip [mailto:pjsip-bounces at lists.pjsip.org] *代表 *Gang Liu
> *发送时间:* 2014年5月30日 10:41
> *收件人:* pjsip list
> *主题:* Re: [pjsip] video call
>
>
>
> conf bridge/switch board is only used by audio.
>
> There are video encoding/decoding clock thread polling video flow. And
> video stream/video port objects are something like audio objects. Also
> there are converter object inside video port for format/size converting
> between video stream and video window.    As Bill said, video tee port is
> connecting preview and encoding stream.
>
> There are some synchronization code at pjmedia. but I didn't read into it.
>
>
>
> regards,
>
> Gang
>
>
>
> On Thu, May 29, 2014 at 12:42 PM, Jason Chen 陈剑桥 <Jason.Chen at tpv-tech.com>
> wrote:
>
> Hi all
>
> I've read Media Flow, there is the diagram(
> http://trac.pjsip.org/repos/wiki/media-flow):
>
>
>
> I have some question about video call.
>
> 1, I can understand it in the voice call, but when make a video call, does
> it work in the same way?
>
> 2, Video calls, including images and sound.  Are image and sound are
> recorded separately?
>
> 3, How sound and image are synchronized
>
>
>
>
>
> Best Regards,
>
> jason.chen
>
>
>
>
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