Re: [Linphone-developers] Need Help : Unable to Open Camera in Linphone Using MediaStreamer

[Guillaume BERAUDO]

Hi,


This seems a nice project.


Do you have a link to the native API documentation?

I can only found about the javascript API.


Cheers,

Guillaume

> Respected Sir,
> 
> I am currently trying to port Linphone to a* Linux based *Operating
> System based on *ARM platform* called *Tizen*.
> 
> I have completed the build of the latest version of Linphone (3.5.2)
> and also of the mediastreamer library (version 2.8.2). When I try to
> run the same on the device, I am able to receive/transfer sound
> between two devices using pulse audio. (Though the *sound is
> accompanied with considerable amount of noise*).
> 
> Whenever I enable the Video support of linphone, I am *unable* to
> open the web-cam of the device through  *v4l2 video filter*.
> 
> Hence, the audio call is possible, however no video call can be made.
> (Camera does not open)
> 
> I have observed that, linphone uses mediastreamer which in-turn uses
> msv4l and msv4l2 drivers to interact with the camera for linux PC.
> However, the Tizen (ARM & Linux based) device does not support v4l or
> v4l2 drivers. The Tizen device, however uses *Gstreamer* to open its
> native camera.
> 
> To support video call in linphone, according to me, there can be two
> approaches and queries based on the same:
> 
> 1. *A separate Video(WebCam) Filter* for interacting with the Tizen
> camera can be created inside mediastreamer, in this case, are there
> any examples (sample code)/demos/documentation which can help us
> *create* an effective *video
> filter* inside MediaStreamer?
> 
> 2. An alternative to MediaStreamer called *Gstreamer* can be used. In
> this case, I would like to know,  whether, there is any version of
> Linphone which has already been built with Gstreamer support. If so,
> I would be grateful, if you could kindly share the code/ location of
> the code. Also, if not Gstreamer, is there any other streaming
> library which could be built with Linphone.
> 
>  Additionally, the audio call is also accompanied with a lot of
> noise, and we have tried "echo cancellation"  to no avail. If there
> can be anyway, the *noise can be reduced* during the calls.
> 
> Also, apart from these two approaches, if anything else could be done
> to enable video calling for the Tizen (ARM) based device, I would
> really appreciate if you could enlighten me with the same.
> 
> Lastly, the I would like to thank you for taking out the time to read
> and respond to these queries.
> Any sought of help from your side would be highly appreciated.
> Expecting a positive response. Thanking you in advance for the same.
> 
> 
> Saurav Maitra
> IIIT-Delhi
> 2008047