Raspberry PI 2

[ghgoldberg]

Has anyone implemented ambi-tv on a RPi 2? I am going to order an RPi2 to REplace my RPi 1, model B. Any ideas as to whether it would boot from the same SD card without any changes? I would imagine that there would (at the very least) be some driver issues?

G-

[zeugri]

Hi,

i'm trying to do this, from a B+ to a RPi2. For the moment i can boot on the sd card, i can compile the ambi-tv sources and run the binary.

but i get a compilation error for the usbtv-driver thus far.

pi@rpi:~/ambi-tv/ambi-tv/misc/usbtv-driver$ make
make -C /lib/modules/3.18.7-v7+/build  M=/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver modules
make[1]: Entering directory '/usr/src/linux-source-3.18.7-v7+'
  CC [M]  /home/pi/ambi-tv/ambi-tv/misc/usbtv-driver/usbtv.o
/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver/usbtv.c:638:8: warning: initialization from incompatible pointer type [enabled by default]
/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver/usbtv.c:638:8: warning: (near initialization for ‘usbtv_vb2_ops.stop_streaming’) [enabled by default]
/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver/usbtv.c: In function ‘usbtv_probe’:
/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver/usbtv.c:719:8: error: ‘V4L2_FL_USE_FH_PRIO’ undeclared (first use in this function)
/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver/usbtv.c:719:8: note: each undeclared identifier is reported only once for each function it appears in
scripts/Makefile.build:263: recipe for target '/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver/usbtv.o' failed
make[2]: *** [/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver/usbtv.o] Error 1
Makefile:1381: recipe for target '_module_/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver' failed
make[1]: *** [_module_/home/pi/ambi-tv/ambi-tv/misc/usbtv-driver] Error 2
make[1]: Leaving directory '/usr/src/linux-source-3.18.7-v7+'
Makefile:6: recipe for target 'all' failed
make: *** [all] Error 2

i'm trying on a brand new install to see if it's better.

EDIT : the driver compiles by commenting line 719 in usbtv.c
(following this discussion https://groups.google.com/forum/#!msg/easycap-somagic-linux/pBB79iKhlsA/30uVdwy9wqwJ saying that flag is deprecated).

Still have to test out this modification.

[zeugri]

After a bit more search on the usbtv topic i came across this info on the LinuxTV website (http://linuxtv.org/wiki/index.php/Easycap) : PAL support is built in the Linux kernel starting with 3.14, at least for my device (Fushicai video grabber ,ID 1b71:3002).

So, at this moment my Kernel is 3.18.7-v7+ on RPi 2 (raspbian). ambi-tv works directly without needing the custom usbtv driver.

Thanks for this great piece of software.

[ghgoldberg]

@zeugri -
Thanks for the posts.

I am having a difficult time in distinguishing the commands and edits associated with the USB driver modifications (performed using the Fushicai with the Raspian Wheezy 2013-07-26 on the RPi 1) from those commands and edits needed to get ambilight to run on the RPi 2,

@Angora posted the following in issue #48:

<----------- clip
sudo apt-get install usbutils
wget https://github.com/gkaindl/ambi-tv/archive/master.zip
unzip master.zip
cd ambi-tv-master
cd misc
sudo bash get-kernel-source.sh
cd usbtv-driver/
make
sudo mkdir -p /lib/modules/3.6.11+/extra
sudo cp usbtv.ko /lib/modules/3.6.11+/extra
sudo depmod 3.6.11+
sudo modprobe videobuf2_core
sudo modprobe videobuf2_vmalloc
sudo modprobe usbtv

change the file:
sudo nano /etc/modprobe.d/raspi-blacklist.conf
to:
#spi-bcm2708

insert into:
sudo nano /etc/modules
these lines of code:
spi-bcm2708
videobuf2_core
videobuf2_vmalloc
usbtv

<------ clip

What lines are the ones needed for installing ambilight running with the current build of Raspdian on the RP1 2?

G-

[patrickmollohan]

Sorry for digging up an old issue, but I did just get this running perfectly on a Pi 2. I used the 2015-01-31 build of Raspbian (found at: https://downloads.raspberrypi.org/raspbian/images/raspbian-2015-02-02/) and updated the kernel to 4.05 via the command sudo rpi-update 6d25078b7cb361052ae280d552561d7250d33f5b
This kernel not only supports video grabbing from the Fushicai devices, but audio as well, which comes in handy if you want to check out xSnowHeadx's fork, which includes a spectrum analysis mode. Finally, make sure to enable the SPI bus via sudo raspi-config under "Advanced Options".
I do not know how much you can update without breaking it. Initially, I tried the most current version of Raspbian with little luck. Perhaps they took out Fushicai support in the kernel? As I get time, I'll play around to see what can or cannot be updated, but at least this setup seems to work.