DigiLite with Raspberry Pi

G4KLB
Posts: 196
Joined: Wed May 28, 2008 10:46 am

DigiLite with Raspberry Pi

Postby G4KLB » Fri Mar 28, 2014 2:18 pm

Evariste F5OEO has made available his work on using a Raspberry Pi with Digilite, at present it is using the RP camera and no sound, have a look at http://www.vivadatv.org//viewtopic.php?f=75&t=293
and http://www.vivadatv.org//viewtopic.php?f=75&t=297 for the SD card image.

I have tested it and it worked first time, It is H264 of course so you will need a DVB-S2 RX.
I used my Comag SL100HD as my Tutioune system was receiving ISS signals at the time!

Many thanks to Evariste F5OEO for sharing this.
Attachments
digipi3.jpg
digipi3.jpg (497.52 KiB) Viewed 4111 times

M0DTS
Posts: 326
Joined: Sun Feb 24, 2008 9:03 pm
Location: Yarm
Contact:

Re: DigiLite with Raspberry Pi

Postby M0DTS » Sat Mar 29, 2014 11:33 am

Excellent, will be having a play with this later..

Will find out if it's easy to use a webcam instead of the PI Cam as i don't have one..!

Rob

M0DTS
Posts: 326
Joined: Sun Feb 24, 2008 9:03 pm
Location: Yarm
Contact:

Re: DigiLite with Raspberry Pi

Postby M0DTS » Sat Mar 29, 2014 7:53 pm

Had a go with a webcam instead of the PI Camera module but no luck yet..

The PI Camera module apparently connects directly to the GPU encoder so there is no CPU overhead, with a usb webcam it goes to the GPU encoder via the CPU which is too much processing in real time.

I've used gstreamer and omxh264enc to generate a h264 stream from a videotestsrc but it cannot do that in real time, 5fps with 320x240 is > 100% cpu usage.

Camera module appears to be required unless someone else has any tips?


Rob

f5oeo
Posts: 63
Joined: Mon Mar 10, 2014 5:46 pm
Location: Migne-Auxances, France

Re: DigiLite with Raspberry Pi

Postby f5oeo » Mon Mar 31, 2014 9:32 pm

This will be the next step I want to try : webcam or Analog input usb module. In my memory gstreamer requires more power than raspivid to encode the PiCAM (25%CPU instead of 4%). What could be an issue is the format of the webcam (RGB, YUV...) sendind though USB. If a color conversation has to be done, it could be also cpu consuming.
I have to order hardware to test it.

73's Evariste F5OEO

M0DTS
Posts: 326
Joined: Sun Feb 24, 2008 9:03 pm
Location: Yarm
Contact:

Re: DigiLite with Raspberry Pi

Postby M0DTS » Tue Apr 01, 2014 5:06 pm

Just for reference:

The webcam i tested was made by Phillips, unknown model, I420 format video at 640x480 res.

I think the gstreamer command was like this:
gst-launch-1.0 -v v4l2src device=/dev/video0 ! "video/x-raw,width=640,height=480,framerate=25/1" ! omxh264enc ! "video/x-h264,width=640,height=480,framerate=25/1" ! filesink location=test.mp4

Rob

G4EWJ
Posts: 587
Joined: Wed Feb 17, 2010 10:11 am
Location: Wirral

Re: DigiLite with Raspberry Pi

Postby G4EWJ » Fri Apr 04, 2014 6:35 pm

I seem to be stuck.

I've downloaded the image and written it to the SD card with win32diskimager. I've installed the RPi camera and plugged in the DigiLite.

When I boot, I get the usual stream of messages, which stops after 5 seconds and does not give a prompt.

If I hit ENTER, I get a (initramfs) prompt, but there appears to be no way to log in. I think I've seen this with the MK808 when something wasn't right.

Can anyone help please.

Brian

G4KLB
Posts: 196
Joined: Wed May 28, 2008 10:46 am

Re: DigiLite with Raspberry Pi

Postby G4KLB » Fri Apr 04, 2014 11:56 pm

That's not right Brian you should have a log in prompt after the usual messages.
I had a similar thing on an Android device and that was a problem with the screen resolution.
The log in was there, but I just couldn't see it!
Hopefully the experts will have some ideas.

Colin

M0DTS
Posts: 326
Joined: Sun Feb 24, 2008 9:03 pm
Location: Yarm
Contact:

Re: DigiLite with Raspberry Pi

Postby M0DTS » Sat Apr 05, 2014 8:08 am

Some file error on the sdcard by the looks of it..
Possibly there was a write error when creating the sdcard? maybe try another card..
Or maybe the image file was corrupted during download..

that's my best guess!

Rob

G4EWJ
Posts: 587
Joined: Wed Feb 17, 2010 10:11 am
Location: Wirral

Re: DigiLite with Raspberry Pi

Postby G4EWJ » Sat Apr 05, 2014 10:32 pm

Thanks for the advice both. I used a different SD card to transfer the image onto the laptop with Win32diskimager and the RPi boots fine now.

After some fun with the French keyboard, I can key in the commands to start transmission, but it says it can't find the camera. I've run raspi-config and enabled the camera and rebooted, but no luck. Raspistill can't find it either. I've got the NoIR version of the camera coming on Monday, so I'll be able to tell if it's a camera problem.

Brian

G4KLB
Posts: 196
Joined: Wed May 28, 2008 10:46 am

Re: DigiLite with Raspberry Pi

Postby G4KLB » Sat Apr 05, 2014 11:11 pm

I am using the standard RP camera (the first one out) and it worked with that.
Did have a problem once, which turned out to be the small on-board plug and socket that comes from the ccd/lens assy
re-seated it and was fine after that.


Return to “DigiLite”

Who is online

Users browsing this forum: No registered users and 2 guests