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gspca V2 vs V1: webcam picture very dark | |
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Running my Logitec cheapo webcam on gspca V2, the result is not as good as when I previously used gspca V1 freestanding (20071224). Specifically, under V2: The picture is very, very dark - can hardly make it out. The webcam light switches off after first use, and stays off. The second may or may not be a problem, but I'm assuming that the light is signaling something useful, thus its state seems important. To test the webcam, I'm using spcaview. Using the freestanding (V1) gspca module on kernel 2.6.26, I see output below (gspca V1 run). The webcam light switches on when the gspca module loads, stays on throughout, and after the application finishes as well. The brightness is normal, ie I can see myself clearly. Using the new gspca_main/gspca_spca561 modules on kernel 2.6.27 I see output below (gspca_main/gspca_spca561 run). The webcam light switches on when the modules are loaded, stays on until spcaview exits, at which point it switches off. It then stays off until the modules are reloaded. The brightness is very low indeed - I can hardly make myself out. The main difference between the two outputs (old then new) seems to be: --------------------------------------------------- Camera found: Logitech QuickCam EC Bridge found: SPCA561 Bridge find SPCA561 number 9 StreamId: GBRG Camera quality 0 autoexpo 1 Timeframe 0 lightfreq 50 Bridge find SPCA561 number 9 vs Camera found: Camera Bridge found: spca561 Unable to find a StreamId !! StreamId: -1 Unknow Camera ---- and ---- VIDIOCGPICT brightnes=16384 hue=0 color=0 contrast=8192 whiteness=0 depth=12 palette=15 vs VIDIOCGPICT brightnes=0 hue=0 color=0 contrast=0 whiteness=0 depth=8 palette=15 -------------------------------- brightness and contrast seem to be way off for the new modules. So, I'm guessing that some attributes that previously were detected by gspca are being missed by gspca_spca561. I am very keen to help make this work properly for gspca V2, but... I am not much of a C coder. If someone can tell me how to produce useful diagnostics, and/or point me at some code to fiddle I'm willing to have a go. However - I'd be best at testing someone else's patches! dmesg for the gspca_main/gspca_spca561 modules is: [ 28.308979] gspca: main v2.3.0 registered [ 28.333195] gspca: probing 046d:092e [ 28.531364] gspca: probe ok [ 28.531603] spca561: registered dmesg for the gspca module is: [ 40.140033] gspca: USB GSPCA camera found.(SPCA561A) [ 40.140033] gspca: [spca5xx_probe:4275] Camera type S561 [ 40.153846] gspca: [spca5xx_getcapability:1249] maxw 352 maxh 288 minw 160 minh 120 [ 40.153907] usbcore: registered new interface driver gspca [ 40.153910] gspca: gspca driver 01.00.20 registered [ 65.614301] gspca: [spca561_init:467] Find spca561 USB Product ID 92e [ 65.828003] gspca: [spca5xx_set_light_freq:1932] Sensor currently not support light frequency banding filters. Regards Ian --------------------- gspca V1 run --------------------- ipic@ian2 ~/bin $ spcaview -d /dev/video_webcam Spcaview version: 1.1.7 date: 06:11:2006 (C) mxhaard@xxxxxxxx Initializing SDL. SDL initialized. bpp 3 format 15 Using video device /dev/video_webcam. Initializing v4l. **************** PROBING CAMERA ********************* Camera found: Logitech QuickCam EC Bridge found: SPCA561 Bridge find SPCA561 number 9 StreamId: GBRG Camera quality 0 autoexpo 1 Timeframe 0 lightfreq 50 Bridge find SPCA561 number 9 Available Resolutions width 352 heigth 288 native Available Resolutions width 320 heigth 240 native * Available Resolutions width 176 heigth 144 native Available Resolutions width 160 heigth 120 native unable to probe size !! ***************************************************** grabbing method default MMAP asked VIDIOCGMBUF size 2457616 frames 2 offets[0]=0 offsets[1]=1228808 VIDIOCGPICT brightnes=16384 hue=0 color=0 contrast=8192 whiteness=0 depth=12 palette=15 VIDIOCSPICT brightness=16384 hue=0 color=0 contrast=8192 whiteness=0 depth=24 palette=15 Stop asked Used 19966ms for 244 images => 81ms/image 12fps. Quiting SDL. Decoded frames:244 Average decode time: 1.000000 unmapping closing closed Destroy Picture thread ... Quiting.... ---------------------------- gspca_main/gspca_spca561 run ---------------------------- ipic@ian2 ~/bin $ LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so spcaview -d /dev/video_webcam Spcaview version: 1.1.7 date: 06:11:2006 (C) mxhaard@xxxxxxxx Initializing SDL. SDL initialized. bpp 3 format 15 Using video device /dev/video_webcam. Initializing v4l. **************** PROBING CAMERA ********************* Camera found: Camera Bridge found: spca561 Unable to find a StreamId !! StreamId: -1 Unknow Camera Available Resolutions width 640 heigth 480 native Available Resolutions width 352 heigth 288 native Available Resolutions width 320 heigth 240 native * Available Resolutions width 176 heigth 144 native Available Resolutions width 160 heigth 120 native unable to probe size !! ***************************************************** grabbing method default MMAP asked VIDIOCGMBUF size 67108864 frames 4 offets[0]=0 offsets[1]=16777216 VIDIOCGPICT brightnes=0 hue=0 color=0 contrast=0 whiteness=0 depth=8 palette=15 VIDIOCSPICT brightness=0 hue=0 color=0 contrast=0 whiteness=0 depth=24 palette=15 Stop asked Used 2131ms for 63 images => 33ms/image 29fps. Quiting SDL. Decoded frames:63 Average decode time: 0.000000 unmapping closing closed Destroy Picture thread ... Quiting.... -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list
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