Camera support Raspberry Pi

gforeman

HI,

I'm struggling to get the camera examples to work when compiling on the Raspberry Pi.

When I run a clean configure I get the following output which I'm assuming is the issue, I'm compiling directly on the Pi...

Qt Multimedia:
ALSA ................................... yes
GStreamer 1.0 .......................... no
GStreamer 0.10 ......................... no

Is there any documentation on which packages are required to build with Gstreamer support? I have the following installed...

gir1.2-gstreamer-0.10
gir1.2-gstreamer-1.0
gstreamer-tools
gstreamer0.10-alsa:armhf
gstreamer0.10-gconf:armhf
gstreamer0.10-plugins-bad:armhf
gstreamer0.10-plugins-base:armhf
gstreamer0.10-plugins-good:armhf
gstreamer0.10-tools
gstreamer0.10-x:armhf
gstreamer1.0-alsa:armhf
gstreamer1.0-clutter
gstreamer1.0-doc
gstreamer1.0-fluendo-mp3:armhf
gstreamer1.0-gnonlin
gstreamer1.0-gnonlin-dbg
gstreamer1.0-gnonlin-doc
gstreamer1.0-libav:armhf
gstreamer1.0-libav-dbg:armhf
gstreamer1.0-nice:armhf
gstreamer1.0-omx
gstreamer1.0-omx-dbg
gstreamer1.0-packagekit
gstreamer1.0-plugins-bad:armhf
gstreamer1.0-plugins-bad-dbg:armhf
gstreamer1.0-plugins-bad-doc
gstreamer1.0-plugins-base:armhf
gstreamer1.0-plugins-base-apps
gstreamer1.0-plugins-base-dbg:armhf
gstreamer1.0-plugins-base-doc
gstreamer1.0-plugins-good:armhf
gstreamer1.0-plugins-good-dbg:armhf
gstreamer1.0-plugins-good-doc
gstreamer1.0-plugins-ugly:armhf
gstreamer1.0-plugins-ugly-dbg:armhf
gstreamer1.0-plugins-ugly-doc
gstreamer1.0-pulseaudio:armhf
gstreamer1.0-tools
gstreamer1.0-vaapi:armhf
gstreamer1.0-vaapi-doc
gstreamer1.0-x:armhf
libgstreamer-plugins-bad0.10-0:armhf
libgstreamer-plugins-bad1.0-0:armhf
libgstreamer-plugins-base0.10-0:armhf
libgstreamer-plugins-base0.10-dev
libgstreamer-plugins-base1.0-0:armhf
libgstreamer-plugins-base1.0-dev
libgstreamer-vaapi1.0-0:armhf
libgstreamer-vaapi1.0-dev
libgstreamer0.10-0:armhf
libgstreamer0.10-dev
libgstreamer1.0-0:armhf
libgstreamer1.0-0-dbg:armhf
libgstreamer1.0-dev
libqtgstreamer-0.10-0:armhf
libqtgstreamer-dev
libqtgstreamerui-0.10-0:armhf
libqtgstreamerutils-0.10-0:armhf

Thanks in advance!

jsulm

@gforeman Try to call configure with -v parameter, then you will get more information about what is missing.

gforeman

Thanks for that, I'm getting this...

Trying source 0 (type pkgConfig) of library gstreamer_1_0 ...
pkg-config use disabled globally.
=> source produced no result.
test config.multimedia.libraries.gstreamer_1_0 FAILED
Checking for GStreamer 0.10...
Trying source 0 (type pkgConfig) of library gstreamer_0_10 ...
pkg-config use disabled globally.
=> source produced no result.
test config.multimedia.libraries.gstreamer_0_10 FAILED

WARNING: Cross compiling without sysroot. Disabling pkg-config

I'm using CROSS_COMPILE=/usr/bin/ as a configure parameter, is there another parameter I need to supply?

gforeman

For anyone with the same issue I added -sysroot / to the configure line and gstreamer was found.

I guess this is required as CROSS_COMPILE is in the configure line.

jars121

I don't suppose you can link to a tutorial/step-by-step you used to successfully compile directly on the Pi? I've tried just about every tutorial I could find and haven't had any success thus far.

gforeman

@jars121 I used this https://wiki.qt.io/Native_Build_of_Qt5_on_a_Raspberry_Pi guide and got it complied successfully on a raspberry Pi 3.

The only changes were I didn't need to edit the QT_CFLAGS settings as outlined in the guide and I added -sysroot / to the configure. My configure skipped quite a few modules though so was probably less likely to encounter errors, compiling takes forever on the Pi so its worth skipping unnecessary modules.

Siva

@gforeman Thanks for your post. Were you able to get the qcamera working with the picam on raspberry pi 3? I am having an issue where qcamera and qcamerainfo recognises the picam /dev/video0 but the camera never completes the status transition to Active. It remains stuck at LoadingStatus. Please see my post on the raspberry pi forums.

It will be great if you can help me get the picam working within a qt app.