[GEM-dev] using Android as a tethered screen for vr

[Benjamin ~ b01]

Hello,

Le 03/04/2017 à 18:50, Max a écrit :
> On 2017년 04월 02일 20:01, Max wrote:
>> Hi Alan,
>>
>> that's interesting. I haven't thought about the VNC option. I will need
>> A VNC server on my Linux computer which allows me to send the content of
>> the GEM window only.
>
> Note to self and anyone searching this some day: this works with x11vnc.
> Use the command xwininfo to find out the ID of the window to be
> shared, then use
> x11vnc -id {id number here}
> to share only one window to the vnc client.
>
> However cardboard-vnc-free is doing too much. First of all, it
> controls the moise pointer on the server (as a VNC client should) but
> I don't need that. There is an option "Viewer" in the connection
> settings that will diable this and lower the latency from about 3
> seconds to 1 second.
>
> cardboard-vnc-free is also adding two viewports to the shared image,
> to fake a 3D. That's a show stopper, because I want to use the stereo
> mode in GEM.
>
>> Another idea would be to use VLC on the android phone to open a stream
>> that is sent by the computer via Pd/Gem and some way to cast the stream.
>
> I think this is the way to go. It also has lower latency than a VNC
> connection.
>
> What's the best way to stream a GEM window, so that I can play this
> stream with VLC on the Android device?
I would say (if you are on linux) : use
https://github.com/umlaeute/v4l2loopback to create a virtual v4l2
device, then it's possible to use pix_record eventually in conjonction
with pix_snap to shoot Gem window and write it to this virtual v4l2
device (on my computer, it would involve to send a [codec v4l2< message
to pix_record)
then you can stream to the Android device with ffmpeg fed by this v4l2
device and read it with vlc

also possible to grab the Gem screen with ffmpeg -f x11grab +options

++
b
>
>
> M.
>
>
>
>> On 2017년 04월 01일 23:31, Alan Brooker wrote:
>>> Hey Max,
>>>
>>> Recently I have been looking at this very subject, in the end using
>>> trinus vr (trinusvirtualreality.com <http://trinusvirtualreality.com>)
>>>  on windows was the easiest solution for me
>>>
>>>  I have tried something similar on linux (Fedora) but my problem was
>>> just getting my PC to actually connect with my phone- this would be
>>> trivial I assume for someone who is experienced setting up VNC
>>> connections/networking on Linux. So take a look at these and good luck
>>>
>>> https://play.google.com/store/apps/details?id=tantra.tantransha.cardboardremotedesktop.lite&hl=en
>>>
>>>
>>> http://www.vrbites.com/apps/cardboard-vnc-free/
>>>
>>> On Fri, Mar 31, 2017 at 8:34 PM, Max <abonnements at revolwear.com
>>> <mailto:abonnements at revolwear.com>> wrote:
>>>
>>>     Hi list,
>>>
>>>     I'm looking for a solution to use the gem output on an android
>>> phone
>>>     for vr.
>>>
>>>     I found this app, but it is windows only, no linux host.
>>>     http://www.swatterco.com/vr_streamer.php
>>>     <http://www.swatterco.com/vr_streamer.php>
>>>
>>>     Any ideas about this?
>>>
>>>     m.
>
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