The same bug still exists with sane-utils 1.0.24-8:

scanimage -L
device `v4l:/dev/video1' is a Noname Philips 740 webcam virtual device
device `v4l:/dev/video0' is a Noname Terratec Cinergy HT PCI virtual device

scanimage -d v4l:/dev/video1 > image.pnm
scanimage: sane_start: Invalid argument

SANE_DEBUG_V4L=2 scanimage -d v4l:/dev/video1 -T -vv
[sanei_debug] Setting debug level of v4l to 2.
[v4l] SANE v4l backend version 1.0 build 5 from sane-backends 1.0.24
[v4l] attach: failed to open device `/dev/bttv0': No such file or directory
[v4l] attach: found videodev `Terratec Cinergy HT PCI' on `/dev/video0'
[v4l] attach: found videodev `Philips 740 webcam' on `/dev/video1'
[v4l] attach: failed to open device `/dev/video2': No such file or directory
[v4l] attach: failed to open device `/dev/video3': No such file or directory
[v4l] sane_open: ioctl VIDIOCSPICT failed (Invalid argument)
[v4l] sane_control option: option is inactive
[v4l] sane_control option: option is inactive
[v4l] sane_control option: option is inactive
[v4l] sane_control option: option is inactive
[v4l] sane_control option: option is inactive
scanimage: ignored request to set inactive option br-x
[v4l] sane_control option: option is inactive
scanimage: ignored request to set inactive option br-y
[v4l] sane_start
[v4l] sane_start: mmapped frame 640 x 480 with palette 1
[v4l] sane_start: ioctl VIDIOCMCAPTURE failed: Invalid argument
scanimage: sane_start: Invalid argument
[v4l] sane_cancel
Closing device
[v4l] sane_close: trying to close handle 0x7fcfbb183c70
Calling sane_exit
scanimage: finished

I did not mention it in the initial bug report, but image capture was working 
back in early 2006.


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