Same output with the original camera I reported the crash under WengoPhone, now under qutecom:

swScaler: Unknown format is not supported as input format
swScaler: Unknown format is not supported as input format
swScaler: Unknown format is not supported as input format
swScaler: Unknown format is not supported as input format

$ v4l-info 

### v4l2 device info [/dev/video0] ###
general info
    VIDIOC_QUERYCAP
	driver                  : "zc3xx"
	card                    : "USB Camera (046d:08d7)"
	bus_info                : "0000:00:1d.0"
	version                 : 2.2.0
	capabilities            : 0x5000001 [VIDEO_CAPTURE,READWRITE,STREAMING]

standards

inputs
    VIDIOC_ENUMINPUT(0)
	index                   : 0
	name                    : "zc3xx"
	type                    : CAMERA
	audioset                : 0
	tuner                   : 0
	std                     : 0x0 []
	status                  : 0x0 []

video capture
    VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
	index                   : 0
	type                    : VIDEO_CAPTURE
	flags                   : 1
	description             : "JPEG"
	pixelformat             : 0x4745504a [JPEG]
    VIDIOC_G_FMT(VIDEO_CAPTURE)
	type                    : VIDEO_CAPTURE
	fmt.pix.width           : 320
	fmt.pix.height          : 240
	fmt.pix.pixelformat     : 0x4745504a [JPEG]
	fmt.pix.field           : NONE
	fmt.pix.bytesperline    : 320
	fmt.pix.sizeimage       : 29390
	fmt.pix.colorspace      : JPEG
	fmt.pix.priv            : 1

controls
    VIDIOC_QUERYCTRL(BASE+0)
	id                      : 9963776
	type                    : INTEGER
	name                    : "Brightness"
	minimum                 : 0
	maximum                 : 255
	step                    : 1
	default_value           : 128
	flags                   : 0
    VIDIOC_QUERYCTRL(BASE+1)
	id                      : 9963777
	type                    : INTEGER
	name                    : "Contrast"
	minimum                 : 0
	maximum                 : 256
	step                    : 1
	default_value           : 128
	flags                   : 0

### video4linux device info [/dev/video0] ###
general info
    VIDIOCGCAP
	name                    : "USB Camera (046d:08d7)"
	type                    : 0x1 [CAPTURE]
	channels                : 1
	audios                  : 0
	maxwidth                : 640
	maxheight               : 480
	minwidth                : 48
	minheight               : 32

channels
    VIDIOCGCHAN(0)
	channel                 : 0
	name                    : "zc3xx"
	tuners                  : 0
	flags                   : 0x0 []
	type                    : CAMERA
	norm                    : 0

tuner
ioctl VIDIOCGTUNER: Invalid argument

audio
ioctl VIDIOCGAUDIO: Invalid argument

picture
    VIDIOCGPICT
	brightness              : 32896
	hue                     : 0
	colour                  : 0
	contrast                : 32768
	whiteness               : 39321
	depth                   : 8
	palette                 : unknown

buffer
ioctl VIDIOCGFBUF: Invalid argument

window
    VIDIOCGWIN
	x                       : 0
	y                       : 0
	width                   : 320
	height                  : 240
	chromakey               : 0
	flags                   : 0