#81 no compatible video input format

[SEnthoven]

I'm trying to compile zbar for an olimex A20 mini board.
It compiles perfectly but does not run

zbar version: latest from git repo as at 12/06/2014
os: Debian GNU/Linux 7.0
uname -a
Linux a20-OLinuXino 3.4.67+ #6 SMP PREEMPT Fri Nov 1 17:32:40 EET 2013 armv7l GNU/Linux

./configure --without-imagemagick --without-qt --without-gtk --enable-video=yes --without-x --without-jpeg --enable-pthread=yes

zbarcam --nodisplay --verbose=32
_zbar_video_open: opened camera device /dev/video0 (fd=5)
_zbar_v4l2_probe: Microsoft�® LifeCam HD-3000 on usb-sw-ehci-1 driver uvcvideo (version 3.4.67)
_zbar_v4l2_probe: capabilities: CAPTURE STREAMING
v4l2_reset_crop: crop bounds: 640 x 480 @ (0, 0)
v4l2_reset_crop: current crop win: 640 x 480 @ (0, 0) aspect 1 / 1
v4l2_probe_formats: enumerating supported formats:
v4l2_probe_formats: [0] YUYV : YUV 4:2:2 (YUYV)
v4l2_probe_formats: [1] MJPG : MJPEG COMPRESSED
v4l2_probe_formats: current format: YUYV(56595559) 640 x 480 (line=0x500 size=0x96000)
_zbar_v4l2_probe: using I/O mode: USERPTR
proc_input_thread: spawned input thread
_zbar_best_format: from YUYV(56595559) to Y800(30303859)=24
zbar_negotiate_format: YUYV(56595559) -> Y800(30303859) (24)
_zbar_best_format: from MJPG(47504a4d) to Y800(30303859)=-1
zbar_negotiate_format: MJPG(47504a4d) -> ? (unsupported)
zbar_negotiate_format: setting best format YUYV(56595559) (24)
v4l2_set_format: VIDIOC_S_FMT returned -1(16), trying interlaced...
ERROR: zbar video in v4l2_set_format():
system error: setting format 56595559 (VIDIOC_S_FMT): Device or resource busy (16)
zbar_processor_init: ERROR: no compatible video input format
ERROR: zbar processor in zbar_processor_init():
unsupported request: no compatible image format
ERROR: zbar processor in zbar_processor_init():
unsupported request: no compatible image format

v4l-info

v4l2 device info [/dev/video0]

general info
VIDIOC_QUERYCAP
driver : "uvcvideo"
card : "Microsoft® LifeCam HD-3000"
bus_info : "usb-sw-ehci-1"
version : 3.4.67
capabilities : 0x4000001 [VIDEO_CAPTURE,STREAMING]

standards

inputs
VIDIOC_ENUMINPUT(0)
index : 0
name : "Camera 1"
type : CAMERA
audioset : 0
tuner : 0
std : 0x0 []
status : 0x0 []

video capture
VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
index : 0
type : VIDEO_CAPTURE
flags : 0
description : "YUV 4:2:2 (YUYV)"
pixelformat : 0x56595559 [YUYV]
VIDIOC_ENUM_FMT(1,VIDEO_CAPTURE)
index : 1
type : VIDEO_CAPTURE
flags : 1
description : "MJPEG"
pixelformat : 0x47504a4d [MJPG]
VIDIOC_G_FMT(VIDEO_CAPTURE)
type : VIDEO_CAPTURE
fmt.pix.width : 640
fmt.pix.height : 480
fmt.pix.pixelformat : 0x56595559 [YUYV]
fmt.pix.field : NONE
fmt.pix.bytesperline : 1280
fmt.pix.sizeimage : 614400
fmt.pix.colorspace : SRGB
fmt.pix.priv : 0

controls
VIDIOC_QUERYCTRL(BASE+0)
id : 9963776
type : INTEGER
name : "Brightness"
minimum : 30
maximum : 255
step : 1
default_value : 133
flags : 0
VIDIOC_QUERYCTRL(BASE+1)
id : 9963777
type : INTEGER
name : "Contrast"
minimum : 0
maximum : 10
step : 1
default_value : 5
flags : 0
VIDIOC_QUERYCTRL(BASE+2)
id : 9963778
type : INTEGER
name : "Saturation"
minimum : 0
maximum : 200
step : 1
default_value : 83
flags : 0
VIDIOC_QUERYCTRL(BASE+12)
id : 9963788
type : BOOLEAN
name : "White Balance Temperature, Auto"
minimum : 0
maximum : 1
step : 1
default_value : 1
flags : 0
VIDIOC_QUERYCTRL(BASE+24)
id : 9963800
type : MENU
name : "Power Line Frequency"
minimum : 0
maximum : 2
step : 1
default_value : 2
flags : 0
VIDIOC_QUERYCTRL(BASE+26)
id : 9963802
type : INTEGER
name : "White Balance Temperature"
minimum : 2800
maximum : 10000
step : 1
default_value : 4500
flags : 0
VIDIOC_QUERYCTRL(BASE+27)
id : 9963803
type : INTEGER
name : "Sharpness"
minimum : 0
maximum : 50
step : 1
default_value : 25
flags : 0
VIDIOC_QUERYCTRL(BASE+28)
id : 9963804
type : INTEGER
name : "Backlight Compensation"
minimum : 0
maximum : 10
step : 1
default_value : 0
flags : 0

[duck]

Try the patch from this Arch Linux bug report: https://bugs.archlinux.org/task/44091

[Darrell Enns]

It seems like this code has been abandoned (5 years since the last commit), but the patch duck linked to works. If any maintainers are still around, it would be great to get it committed.