Qt camera example not working on i.MX6Q

marcoraiteri · ‎03-05-2015

Hello,

I have a problem running the Qt camera example on the Freescale MCIMX6Q-SDP evaluation board.

I am using imx-3.10.53-1.1.0_ga from git://git.freescale.com/imx/fsl-arm-yocto-bsp.git

I built the image with yocto:

bitbake fsl-image-qt5

This is my local.conf:

-----------------------------------------------------------------------------------

BB_NUMBER_THREADS ?= "${@oe.utils.cpu_count()}"

PARALLEL_MAKE ?= "-j ${@oe.utils.cpu_count()}"

MACHINE ??= 'imx6qsabresd'

DISTRO ?= 'poky'

PACKAGE_CLASSES ?= "package_rpm"

EXTRA_IMAGE_FEATURES = "debug-tweaks"

USER_CLASSES ?= "buildstats image-mklibs image-prelink"

PATCHRESOLVE = "noop"

BB_DISKMON_DIRS = "\

STOPTASKS,${TMPDIR},1G,100K \

STOPTASKS,${DL_DIR},1G,100K \

STOPTASKS,${SSTATE_DIR},1G,100K \

ABORT,${TMPDIR},100M,1K \

ABORT,${DL_DIR},100M,1K \

ABORT,${SSTATE_DIR},100M,1K"

PACKAGECONFIG_pn-qemu-native = "sdl"

PACKAGECONFIG_pn-nativesdk-qemu = "sdl"

ASSUME_PROVIDED += "libsdl-native"

CONF_VERSION = "1"

BB_NUMBER_THREADS = '4'

PARALLEL_MAKE = '-j 4'

DL_DIR ?= "${BSPDIR}/downloads/"

ACCEPT_FSL_EULA = ""

LICENSE_FLAGS_WHITELIST = "commercial"

IMAGE_INSTALL_append = " \

openssh-sftp-server \

cpufrequtils \

nano \

gstreamer \

gst-meta-video \

gst-fsl-plugin \

gst-plugins-base-app \

gst-plugins-base \

gst-plugins-base-meta \

gst-plugins-good \

gst-plugins-good-rtsp \

gst-plugins-good-udp \

gst-plugins-good-rtpmanager \

gst-plugins-good-rtp \

gst-plugins-good-video4linux2 \

gst-plugins-good-meta \

gst-plugins-bad \

gst-plugins-bad-camerabin2 \

gst-plugins-bad-meta \

gst-plugins-ugly \

gst-plugins-ugly-meta \

gst-plugins-gl \

gst-plugins-gl-meta \

gst-plugins-gl-opengl \

packagegroup-fsl-gstreamer \

packagegroup-fsl-tools-testapps \

packagegroup-fsl-tools-benchmark \

imx-vpu \

imx-test \

qtbase-fonts \

qtbase-plugins \

qtbase-tools \

qtbase-examples \

qtmultimedia \

qtmultimedia-plugins \

qtmultimedia-examples \

qtmultimedia-qmlplugins \

qtsvg \

qtsvg-plugins \

qtsensors \

qtimageformats-plugins \

qtsystems \

qtsystems-tools \

qtsystems-examples \

qtsystems-qmlplugins \

qtscript \

qt3d \

qt3d-examples \

qt3d-qmlplugins \

qt3d-tools \

\

qtdeclarative \

qtdeclarative-plugins \

qtdeclarative-tools \

qtdeclarative-examples \

qtdeclarative-qmlplugins \

\

qtgraphicaleffects-qmlplugins \

qtconnectivity-qmlplugins \

qtlocation-plugins \

qtlocation-qmlplugins \

cairo pango fontconfig freetype pulseaudio dbus \

alsa-lib alsa-tools alsa-state alsa-utils-alsaconf fsl-alsa-plugins \

i2c-tools \

"

PACKAGECONFIG_append_pn-qtmultimedia = " gstreamer010"

-----------------------------------------------------------------------------------

This is my bblayers.conf:

-----------------------------------------------------------------------------------

LCONF_VERSION = "6"

BBPATH = "${TOPDIR}"

BSPDIR := "${@os.path.abspath(os.path.dirname(d.getVar('FILE', True)) + '/../..')}"

BBFILES ?= ""

BBLAYERS = " \

${BSPDIR}/sources/poky/meta \

${BSPDIR}/sources/poky/meta-yocto \

\

${BSPDIR}/sources/meta-openembedded/meta-oe \

\

${BSPDIR}/sources/meta-fsl-arm \

${BSPDIR}/sources/meta-fsl-arm-extra \

${BSPDIR}/sources/meta-fsl-demos \

"

##Freescale Yocto Release layer

BBLAYERS += " ${BSPDIR}/sources/meta-fsl-bsp-release/imx/meta-fsl-arm "

BBLAYERS += " ${BSPDIR}/sources/meta-fsl-bsp-release/imx/meta-fsl-demos "

BBLAYERS += " ${BSPDIR}/sources/meta-browser "

BBLAYERS += " ${BSPDIR}/sources/meta-openembedded/meta-gnome "

BBLAYERS += " ${BSPDIR}/sources/meta-openembedded/meta-networking "

BBLAYERS += " ${BSPDIR}/sources/meta-openembedded/meta-ruby "

BBLAYERS += " ${BSPDIR}/sources/meta-openembedded/meta-multimedia "

BBLAYERS += " ${BSPDIR}/sources/meta-qt5 "

BBLAYERS += " ${BSPDIR}/sources/meta-fsl-bsp-release/imx/meta-fsl-qt5 "

BBLAYERS += " ${BSPDIR}/sources/meta-fsl-bsp-release/imx/meta-fsl-bluez "

-----------------------------------------------------------------------------------

When I run the Qt camera example (/usr/share/qt5/examples/multimediawidgets/camera/camera) I get the following warnings and errors:

Qt Warning: Could not find a location of the system's Compose files. Consider setting the QTCOMPOSE environment variable.

** (camera:1054): CRITICAL **: gst_photography_set_focus_mode: assertion 'photo != NULL' failed

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

** (camera:1054): CRITICAL **: gst_missing_encoder_message_new: assertion '!gst_caps_is_any (encode_caps)' failed

(camera:1054): GStreamer-CRITICAL **: gst_element_post_message: assertion 'message != NULL' failed

CameraBin error: "Your GStreamer installation is missing a plug-in."

I have tried to put in the image all the gstreamer plugins (base, good, bad, ugly).

I don't understand which plugin is missing.

Any help would be very appreciated.

Thank you very much

joanxie · ‎05-19-2016

I checked the difference between v4l2src and imxv4l2src, v4l2src meas video source, and imxv4l2src means camera source.

it seems this QT application doesn't capture source from camera, did you try to use the latest bsp? because 3.10.53 is old version, if you must use this vesrion, pls let me know it, let me try to install it and reproduce it.

haggaytavyumi · ‎08-07-2016

Hi Guanqiong

I use the 3.14.52 BSP.

I have solved the problem in a total different way.

I made a linux service like program that take the frame from the source, the camera, and push the frame to the display.

The same frame pushed to the "appsrc", that way I can use it to record the frames and capture pictures.

I used the unit_test/v4l2... source as my reference for that.

thank you

haggaytavyumi · ‎05-16-2016

Hello all,

We are facing the same issue.

I found out that in our system the reason to the memory leak is the ioctl function VIDIOC_ENUMSTD.

The Gstreamer get in to a endless loop because of not valid data from the v4l2 capture driver.

Did someone managed to solve the issue?

Thanks

vardhmanmodi · ‎09-11-2015

Hello,

We are also facing same issue.

Did you able to get QT camera working?

Thanks

marcoraiteri · ‎03-12-2015

I have added to local.conf, in IMAGE_INSTALL_append, the package packagegroup-fsl-gstreamer-full.

Adding that package the error has changed; now there is an out of memory error.

/usr/share/qt5/examples/multimediawidgets/camera/camera

Qt Warning: Could not find a location of the system's Compose files. Consider setting the QTCOMPOSE environment variable.

** (camera:1080): CRITICAL **: gst_photography_set_focus_mode: assertion 'photo != NULL' failed

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 1 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 1

camera invoked oom-killer: gfp_mask=0x200da, order=0, oom_score_adj=0

CPU: 1 PID: 1080 Comm: camera Not tainted 3.10.53-1.1.0_ga+g496fbe0 #1

[<80013b00>] (unwind_backtrace+0x0/0xf4) from [<80011524>] (show_stack+0x10/0x14

)

[<80011524>] (show_stack+0x10/0x14) from [<8067eb98>] (dump_header.isra.10+0x68/

0x188)

[<8067eb98>] (dump_header.isra.10+0x68/0x188) from [<80093288>] (oom_kill_proces

s+0x268/0x3b8)

[<80093288>] (oom_kill_process+0x268/0x3b8) from [<80093850>] (out_of_memory+0x2

ac/0x2d8)

[<80093850>] (out_of_memory+0x2ac/0x2d8) from [<800976fc>] (__alloc_pages_nodema

sk+0x858/0x89c)

[<800976fc>] (__alloc_pages_nodemask+0x858/0x89c) from [<800af574>] (handle_pte_

fault+0x550/0x74c)

[<800af574>] (handle_pte_fault+0x550/0x74c) from [<800af828>] (handle_mm_fault+0

xb8/0x100)

[<800af828>] (handle_mm_fault+0xb8/0x100) from [<8001860c>] (do_page_fault+0x208

/0x390)

[<8001860c>] (do_page_fault+0x208/0x390) from [<80008394>] (do_DataAbort+0x38/0x

98)

[<80008394>] (do_DataAbort+0x38/0x98) from [<8000ddf4>] (__dabt_usr+0x34/0x40)

Exception stack(0xa837bfb0 to 0xa837bff8)

bfa0: 00000419 00000000 00000df1 328ebe00

bfc0: 7611f4dc 328ec210 328ebe00 00000428 7611f50c 00000001 00001208 00000083

bfe0: 00000419 7ea41210 7605f77c 7605eb88 60000010 ffffffff

Mem-info:

DMA per-cpu:

CPU 0: hi: 186, btch: 31 usd: 94

CPU 1: hi: 186, btch: 31 usd: 17

CPU 2: hi: 186, btch: 31 usd: 172

CPU 3: hi: 186, btch: 31 usd: 77

active_anon:210210 inactive_anon:284 isolated_anon:0

active_file:36 inactive_file:0 isolated_file:0

unevictable:0 dirty:0 writeback:0 unstable:0

free:856 slab_reclaimable:827 slab_unreclaimable:2068

mapped:274 shmem:323 pagetables:807 bounce:0

free_cma:0

DMA free:3500kB min:3336kB low:4168kB high:5004kB active_anon:840840kB inactive_

anon:1136kB active_file:108kB inactive_file:196kB unevictable:0kB isolated(anon)

:0kB isolated(file):0kB present:1048576kB managed:697156kB mlocked:0kB dirty:0kB

writeback:0kB mapped:1096kB shmem:1292kB slab_reclaimable:3308kB slab_unreclaim

able:8272kB kernel_stack:1504kB pagetables:3228kB unstable:0kB bounce:0kB free_c

ma:0kB writeback_tmp:0kB pages_scanned:491 all_unreclaimable? yes

lowmem_reserve[]: 0 0 0 0

DMA: 13*4kB (MR) 10*8kB (MR) 3*16kB (R) 4*32kB (R) 0*64kB 1*128kB (R) 0*256kB 0*

512kB 1*1024kB (R) 1*2048kB (R) 0*4096kB 0*8192kB 0*16384kB 0*32768kB = 3508kB

443 total pagecache pages

0 pages in swap cache

Swap cache stats: add 0, delete 0, find 0/0

Free swap = 0kB

Total swap = 0kB

262144 pages of RAM

1472 free pages

7038 reserved pages

1658 slab pages

264686 pages shared

0 pages swap cached

[ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name

[ 208] 0 208 753 108 6 0 -1000 udevd

[ 329] 0 329 816 148 6 0 -1000 udevd

[ 330] 0 330 750 105 6 0 -1000 udevd

[ 783] 0 783 670 54 5 0 0 S01xserver-

nodm

[ 806] 0 806 758 22 5 0 0 xinit

[ 807] 996 807 734 73 5 0 0 dbus-daemon

[ 809] 0 809 41147 1182 83 0 0 Xorg

[ 811] 0 811 1400 88 6 0 0 connmand

[ 816] 0 816 565 23 4 0 0 dropbear

[ 821] 0 821 1252 38 6 0 0 wpa_supplic

antbefore the out of memory error

[ 824] 999 824 599 47 5 0 0 rpcbind

[ 835] 997 835 486 30 5 0 0 rpc.statd

[ 847] 0 847 549 13 4 0 0 syslogd

[ 850] 0 850 549 16 4 0 0 klogd

[ 856] 998 856 825 50 5 0 0 avahi-daemo

n

[ 857] 998 857 825 45 5 0 0 avahi-daemo

n

[ 868] 0 868 1113 81 6 0 0 ofonod

[ 876] 0 876 974 31 5 0 0 oprofile-se

rver

[ 878] 0 878 779 23 5 0 0 autohdmi

[ 885] 0 885 654 36 5 0 0 rc_mxc.S

[ 886] 0 886 550 14 5 0 0 getty

[ 888] 0 888 750 66 5 0 0 sh

[ 890] 0 890 1649 186 6 0 0 matchbox-wi

ndow

[ 894] 0 894 841 54 5 0 0 dbus-launch

[ 895] 0 895 701 42 5 0 0 dbus-daemon

[ 910] 0 910 656 41 5 0 0 Xsession

[ 919] 0 919 5581 268 15 0 0 connman-app

let

[ 950] 0 950 5918 607 15 0 0 matchbox-de

skto

[ 951] 0 951 5829 405 15 0 0 matchbox-pa

nel

[ 955] 0 955 23716 338 14 0 0 pulseaudio

[ 957] 0 957 1506 70 7 0 0 gconfd-2

[ 958] 0 958 3788 188 11 0 0 settings-da

emon

[ 963] 0 963 4191 185 12 0 0 console-kit

-dae

[ 1027] 0 1027 1427 105 7 0 0 matchbox-ke

yboa

[ 1080] 0 1080 263662 205749 500 0 0 camera

Out of memory: Kill process 1080 (camera) score 780 or sacrifice child

Killed process 1080 (camera) total-vm:1054648kB, anon-rss:822700kB, file-rss:296

kB

Killed

If I run the camera example with strace, I see before the out of memory error a lot of lines like the followig one:

ioctl(16, VIDIOC_ENUMSTD, 0x7ed0b5d0) = 0

It looks like an infinite loop.

Any idea ?

Thanks

joanxie · ‎03-31-2015

try to use the gstreamer command gst-launch v4l2src ! autovideosink , and check the mxcv4l2 test to test the camera.

marcoraiteri · ‎04-01-2015

The camera, when used with v4l2, works. For instance the mxc_v4l2_overlay.out unit test works.

The problem is using the camera from Qt.

gst-launch v4l2src ! autovideosink doesn't work (out of memory). This is the output:


Setting pipeline to PAUSED ...

MFW_GST_V4LSINK_PLUGIN 4.0.2 build on Mar 2 2015 11:04:36.
syslogd invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
CPU: 1 PID: 851 Comm: syslogd Not tainted 3.10.53-1.1.0_ga+g496fbe0 #1

[<80013b00>] (unwind_backtrace+0x0/0xf4) from [<80011524>] (show_stack+0x10/0x14

)

[<80011524>] (show_stack+0x10/0x14) from [<8067eb98>] (dump_header.isra.10+0x68/

0x188)

[<8067eb98>] (dump_header.isra.10+0x68/0x188) from [<80093288>] (oom_kill_proces

s+0x268/0x3b8)

[<80093288>] (oom_kill_process+0x268/0x3b8) from [<80093850>] (out_of_memory+0x2

ac/0x2d8)

[<80093850>] (out_of_memory+0x2ac/0x2d8) from [<800976fc>] (__alloc_pages_nodema

sk+0x858/0x89c)

[<800976fc>] (__alloc_pages_nodemask+0x858/0x89c) from [<800924f8>] (filemap_fau

lt+0x1cc/0x420)

[<800924f8>] (filemap_fault+0x1cc/0x420) from [<800abedc>] (__do_fault+0x68/0x45

4)

[<800abedc>] (__do_fault+0x68/0x454) from [<800af094>] (handle_pte_fault+0x70/0x

74c)

[<800af094>] (handle_pte_fault+0x70/0x74c) from [<800af828>] (handle_mm_fault+0x

b8/0x100)

[<800af828>] (handle_mm_fault+0xb8/0x100) from [<8001860c>] (do_page_fault+0x208

/0x390)

[<8001860c>] (do_page_fault+0x208/0x390) from [<80008394>] (do_DataAbort+0x38/0x

98)

[<80008394>] (do_DataAbort+0x38/0x98) from [<8000ddf4>] (__dabt_usr+0x34/0x40)

Exception stack(0xa8c63fb0 to 0xa8c63ff8)
3fa0:	00000000 76efdffb 76efdf88 000026b0

3fc0: 7ef0da58 fbad8001 00000000 76f4d4c0 00000000 000829dc 00000013 7ef0da4c

3fe0: 00000073 7ef0d518 76e25e1c 76e260f8 800f0010 ffffffff
Mem-info:
DMA per-cpu:
CPU	0: hi: 186, btch: 31 usd: 103
CPU	1: hi: 186, btch: 31 usd: 176
CPU	2: hi: 186, btch: 31 usd: 185
CPU	3: hi: 186, btch: 31 usd: 128
active_anon:210587 inactive_anon:321 isolated_anon:0
active_file:0 inactive_file:0 isolated_file:0
unevictable:0 dirty:0 writeback:0 unstable:0
free:829 slab_reclaimable:770 slab_unreclaimable:2060
mapped:209 shmem:356 pagetables:722 bounce:0
free_cma:0

DMA free:3316kB min:3336kB low:4168kB high:5004kB active_anon:842348kB inactive_

anon:1284kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB

isolated(file):0kB present:1048576kB managed:697156kB mlocked:0kB dirty:0kB wri

teback:0kB mapped:836kB shmem:1424kB slab_reclaimable:3080kB slab_unreclaimable:

8240kB kernel_stack:1464kB pagetables:2888kB unstable:0kB bounce:0kB free_cma:0k

B writeback_tmp:0kB pages_scanned:561 all_unreclaimable? yes
lowmem_reserve[]: 0 0 0 0

DMA: 1*4kB (R) 1*8kB (R) 1*16kB (R) 1*32kB (R) 0*64kB 2*128kB (R) 0*256kB 0*512k

B 11024kB (R) 12048kB (R) 04096kB 08192kB 016384kB 032768kB = 3388kB
463 total pagecgst-launch imxv4l2src ! imxv4l2sink
MFW_GST_V4LSRC_PLUGIN 4.0.2 build on Mar 2 2015 11:04:54.
ov5640_download_autofocus: Downloaded firmware successfully: 0
MFW_GST_V4LSINK_PLUGIN 4.0.2 build on Mar 2 2015 11:04:36.
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
full screen size:1024x768
[V4L Update Display]: left=0, top=0, width=1024, height=768
set v4l display crop sucessfully
set v4l rotate sucessfully
full screen size:1024x768
>>V4L_SINK: Actually buffer status:
	hardware buffer : 12
	software buffer : 0	ache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap = 0kB
Total swap = 0kB
262144 pages of RAM
1733 free pages
6926 reserved pages
1620 slab pages
264595 pages shared
0 pages swap cached
[ pid ] uid tgid total_vm	rss nr_ptes swapents oom_score_adj name
[ 208]	0 208	781	114	5	0	-1000 udevd
[ 336]	0 336	749	105	5	0	-1000 udevd
[ 338]	0 338	749	102	5	0	-1000 udevd
[ 787]	0 787	670	54	4	0	0 S01xserver-
nodm
[ 810] 996 810	734	73	5	0	0 dbus-daemon
[ 812]	0 812	758	22	5	0	0 xinit

[ 814]	0 814	41099	1141	84	0	0 Xorg
[ 815]	0 815	1400	88	6	0	0 connmand
[ 820]	0 820	565	23	5	0	0 dropbear
[ 825]	0 825	1252	38	6	0	0 wpa_supplic
ant
[ 828] 999 828	599	45	5	0	0 rpcbind
[ 839] 997 839	486	30	5	0	0 rpc.statd
[ 851]	0 851	549	13	5	0	0 syslogd
[ 854]	0 854	549	16	4	0	0 klogd
[ 860] 998 860	825	50	5	0	0 avahi-daemo
n
[ 861] 998 861	825	45	5	0	0 avahi-daemo
n
[ 872]	0 872	1113	80	5	0	0 ofonod
[ 880]	0 880	974	31	6	0	0 oprofile-se
rver
[ 882]	0 882	779	23	5	0	0 autohdmi
[ 888]	0 888	654	36	5	0	0 rc_mxc.S
[ 889]	0 889	550	14	5	0	0 getty
[ 891]	0 891	751	52	4	0	0 sh
[ 894]	0 894	1650	187	8	0	0 matchbox-wi
ndow
[ 898]	0 898	841	54	4	0	0 dbus-launch
[ 899]	0 899	701	42	5	0	0 dbus-daemon
[ 914]	0 914	656	41	5	0	0 Xsession
[ 923]	0 923	5581	268	14	0	0 connman-app
let
[ 954]	0 954	5911	608	15	0	0 matchbox-de
skto
[ 955]	0 955	5829	445	17	0	0 matchbox-pa
nel
[ 957]	0 957	1506	70	7	0	0 gconfd-2
[ 959]	0 959	3788	188	11	0	0 settings-da
emon
[ 962]	0 962	23716	338	14	0	0 pulseaudio
[ 963]	0 963	1427	105	6	0	0 matchbox-ke
yboa
[ 967]	0 967	4191	187	12	0	0 console-kit
-dae
[ 1032]	0 1032 208419 206144	411	0	0 gst-launch-
0.10

Out of memory: Kill process 1032 (gst-launch-0.10) score 781 or sacrifice child

Killed process 1032 (gst-launch-0.10) total-vm:833676kB, anon-rss:824576kB, file

-rss:0kB
Killed

-------------------------------------------------------------------------------------------------------------------

Instead

gst-launch imxv4l2src ! autovideosink works. This is the output:
MFW_GST_V4LSRC_PLUGIN 4.0.2 build on Mar 2 2015 11:04:54.
Setting pipeline to PAUSED ...
ov5640_download_autofocus: Downloaded firmware successfully: 0
MFW_GST_V4LSINK_PLUGIN 4.0.2 build on Mar 2 2015 11:04:36.
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
full screen size:1024x768
[V4L Update Display]: left=0, top=0, width=1024, height=768
set v4l display crop sucessfully
set v4l rotate sucessfully
full screen size:1024x768
>>V4L_SINK: Actually buffer status:
	hardware buffer : 12
	software buffer : 0

-------------------------------------------------------------------------------------------------------------------

Both the Qt camera example and "gst-launch v4l2src ! autovideosink" crash in a similar way (out of memory).

On the contrary "gst-launch imxv4l2src ! autovideosink" works.

Maybe the problem is that Qt uses the wrong source plugin, v4l2src instead of imxv4l2src ?

Thank you very much

Qt camera example not working on i.MX6Q

Qt camera example not working on i.MX6Q

i.MX6_All

Linux

Multimedia

Yocto Project