# Video streaming through gr-extras tuntap in pre-cog

**URL:** <https://www.ruby-forum.com/t/video-streaming-through-gr-extras-tuntap-in-pre-cog/245823>\
**Category:** GNU Radio\
**Created:** [July 20, 2013, 6:06pm UTC](https://www.ruby-forum.com/t/video-streaming-through-gr-extras-tuntap-in-pre-cog/245823 "2013-07-20T18:06:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rafa\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\
**Post date:** [July 20, 2013, 6:06pm UTC](https://www.ruby-forum.com/t/video-streaming-through-gr-extras-tuntap-in-pre-cog/245823/1 "2013-07-20T18:06:40Z")

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Hi  
I am trying to stream a VLC video stream to the gr-extras tuntap  
device.  
I have modified the simple\_trx demo to include tuntap device and run the  
flow graph as a root. I assign the tap device the required ip address  
but I  
am not sure how to assign a port number to it.

Then I configure the vlc media player to stream webcam video to the tap  
device address. I disable the ARQ in the pre-cog.

The flow graph runs correctly but on a spectrum analyzer I just see a  
single packet and then everything turns off.

Does any body know how to stream video in to the tuntap device.

Regards

---

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**Author:** ![GNU\_radio](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/e0b2c6/32.png) [@GNU\_radio](https://www.ruby-forum.com/u/GNU_radio)\
**Post date:** [July 20, 2013, 6:30pm UTC](https://www.ruby-forum.com/t/video-streaming-through-gr-extras-tuntap-in-pre-cog/245823/2 "2013-07-20T18:30:02Z")

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Dear GNU Radio Guru,

For the sake of this list, I’m going to have to ask you to send all  
support  
requests for pre-cog to removed\_email\_address@domain.invalid. I’ll be getting to the  
other three e-mails you sent last night in a little while.

-John