#83 No video - any camera - Fedora 21

[careca]

No video with any of my cameras.
Fedora21 - Gnome 3.14
zbar version: 0.10-21.fc21

Verbose log:
zbarcam -v /dev/video0
_zbar_video_open: opened camera device /dev/video0 (fd=5)
_zbar_v4l2_probe: Lenovo EasyCamera on usb-0000:00:1a.0-1.6 driver uvcvideo (version 3.18.8)
_zbar_v4l2_probe: capabilities: CAPTURE READWRITE 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
ERROR: zbar video in v4l2_reset_crop():
system error: setting default crop window (VIDIOC_S_CROP): Inappropriate ioctl for device (25)
v4l2_probe_formats: current format: YUYV(56595559) 640 x 480 (line=0x500 size=0x96000)
_zbar_v4l2_probe: using I/O mode: MMAP
_zbar_window_probe_xv: XVideo extension version 2.2
xv_probe_port: probing port 145 with 1 encodings:
xv_probe_port: max XV_IMAGE size 8192x8192
xv_probe_port: 5 image formats
xv_probe_port: probing port 161 with 1 encodings:
xv_probe_port: max XV_IMAGE size 8192x8192
xv_probe_port: 3 image formats
v4l2_set_format: set new format: YUYV(56595559) 640 x 480 (0x96000)
v4l2_mmap_buffers: mapping 4 buffers (of 4 requested)

Thank you!

[Malcolm Mielle]

Same here with the same configuration.

_zbar_video_open: opened camera device /dev/video0 (fd=5)
_zbar_v4l2_probe: USB Camera on usb-0000:00:1a.0-1.2 driver uvcvideo (version 3.18.6)
_zbar_v4l2_probe: capabilities: CAPTURE READWRITE 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
ERROR: zbar video in v4l2_reset_crop():
system error: setting default crop window (VIDIOC_S_CROP): Inappropriate ioctl for device (25)
v4l2_probe_formats: current format: YUYV(56595559) 640 x 480 (line=0x500 size=0x96000)
_zbar_v4l2_probe: using I/O mode: MMAP
_zbar_window_probe_xv: XVideo extension version 2.2
xv_probe_port: probing port 74 with 1 encodings:
xv_probe_port: max XV_IMAGE size 16384x16384
xv_probe_port: 5 image formats
xv_probe_port: probing port 106 with 1 encodings:
xv_probe_port: max XV_IMAGE size 8192x8192
xv_probe_port: 3 image formats
v4l2_set_format: set new format: YUYV(56595559) 640 x 480 (0x96000)
v4l2_mmap_buffers: mapping 4 buffers (of 4 requested)
WARNING: zbar processor in _zbar_processor_handle_input():
output window is closed: user closed display window
zbar_video_open: closed camera (fd=-1)
dump_stats: symbol sets allocated = 4
dump_stats: scanner syms in use = 8 recycled = 0
dump_stats: image syms in use = 0 recycled = 5
dump_stats: symbols allocated = 0
dump_stats: recycled[0] = 0
dump_stats: recycled[1] = 0
dump_stats: recycled[2] = 0
dump_stats: recycled[3] = 0
dump_stats: recycled[4] = 0
_zbar_qr_destroy: max finder lines = 63x63

[duck]

It may be a problem with video output. Try blindly scanning some QR-codes and watch the verbose log. Also try switching windows.

[careca]

Hello, thanks for you suggestion.

YES! It works "blind". There might be a problem with the video output. See verbose output bellow, with scanned URLs at end.
Interesting to notice, on recognition, the "green marking" around the QR gets shown in the Z-bar window. Please,see attached file.

Now, what may have changed between last time I used zbar (anytime in 2014) and now?
I upgraded my Linux distribution from Fedora 20 to 21, and for sure video-driver may have been updated as well...
I could not see any relating messages in the system-log...

Any suggestion for a workaround for this issue?
Sure it is better to see what you are scanning... ;)

Many thanks again!

Verbose log:

[XXX ~]$ zbarcam --verbose --raw --prescale=640x460 /dev/video0
zbar_video_request_size: request size: 640 x 460
_zbar_video_open: opened camera device /dev/video0 (fd=5)
_zbar_v4l2_probe: Lenovo EasyCamera on usb-0000:00:1a.0-1.6 driver uvcvideo (version 3.19.1)
_zbar_v4l2_probe: capabilities: CAPTURE READWRITE 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
ERROR: zbar video in v4l2_reset_crop():
system error: setting default crop window (VIDIOC_S_CROP): Inappropriate ioctl for device (25)
v4l2_probe_formats: current format: YUYV(56595559) 640 x 480 (line=0x500 size=0x96000)
v4l2_probe_formats: setting requested size: 640 x 460
v4l2_probe_formats: final format: YUYV(56595559) 640 x 480 (line=0x500 size=0x96000)
_zbar_v4l2_probe: using I/O mode: MMAP
_zbar_window_probe_xv: XVideo extension version 2.2
xv_probe_port: probing port 145 with 1 encodings:
xv_probe_port: max XV_IMAGE size 8192x8192
xv_probe_port: 5 image formats
xv_probe_port: probing port 161 with 1 encodings:
xv_probe_port: max XV_IMAGE size 8192x8192
xv_probe_port: 3 image formats
v4l2_set_format: set new format: YUYV(56595559) 640 x 480 (0x96000)
v4l2_mmap_buffers: mapping 4 buffers (of 4 requested)
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