uMinded Strikes Again
2014-10-20 04:24:18 UTC
I have a lifecam studio modded for microscope use and the setup works great
but I MUST have manual exposure control as the lighting conditions vary.
I set exposure to manual and if the exposure absolute value is set to
anything except 156 then the frame rate drops to 5-7fps. It does not matter
the resolution or fps setting, exposure must be set to 156 in order to get
full frame rates.
I tried the UVC_QUIRK_FIX_BANDWIDTH quirk (modprobe uvcvideo quirks=128)
and that resulted in only MJPG compression giving full frame rates and YUYV
would always run at 0.50 and a black screen no matter the exposure settings.
Anybody run into this? Let me know what info you want me to dump, here are
a few:
v4l info:
http://pastebin.com/YpLu2PLi
uvcvideo dmesg trace:
http://pastebin.com/BWfZb7i7
but I MUST have manual exposure control as the lighting conditions vary.
I set exposure to manual and if the exposure absolute value is set to
anything except 156 then the frame rate drops to 5-7fps. It does not matter
the resolution or fps setting, exposure must be set to 156 in order to get
full frame rates.
I tried the UVC_QUIRK_FIX_BANDWIDTH quirk (modprobe uvcvideo quirks=128)
and that resulted in only MJPG compression giving full frame rates and YUYV
would always run at 0.50 and a black screen no matter the exposure settings.
Anybody run into this? Let me know what info you want me to dump, here are
a few:
v4l info:
http://pastebin.com/YpLu2PLi
uvcvideo dmesg trace:
http://pastebin.com/BWfZb7i7