With new version of libv4l the brightness and contrast also not working and image is too dark. No dependency of jpeg enable or disable, or I can't see.
Stefan Krastanov wrote: > For me jpeg is working but the quality of the picture is very low. I'm > installing new libv4l now. > > 2009/3/14 Boris Borisov <[email protected] <mailto:[email protected]>> > > > my version of libV4l is: > *  media-libs/libv4l >    Latest version available: 0.5.3 >    Latest version installed: 0.5.3 > with jpeg format brightest and contrast also not working > I test with ekiga > > > Brian Johnson wrote: > > The brightness works on the older version since that comes before we > > got proper format switching working and it was using one of the hard > > coded bridge formats. anyways brightness/contrast do not work ewith > > raw bayer format because the bridge uses its color matrix to control > > those, the color matrix is what the bridge uses to convert the > raw rgb > > values to yuv, and since the bridge passing through the raw bayer > > pattern as received from the sensor without converting to a yuv > format > > brightness and contrast will not work with bayer format. > > > > There are two wys to get this working right first if you insmod the > > module with the jpeg=1 parameter > > (insmod ./sn9c20x.ko jpeg=1) libv4l should choose to use the jpeg > > format instead of bayer or make sure you are using version 0.5.8 or > > greater of libv4l whcih supports the bridges custom yuv format and > > will choose that over bayer > > > > 2009/3/14 Boris Borisov <[email protected] > <mailto:[email protected]>>: > > > >> Because I write a part of old driver, special decoder for 6270 > cameras. > >> On new releases this is decoder is not included. In this case I > use my > >> old copy of repository May 2008. > >> Because my implementations is using this functions (image > processing) > >> access via sys-fs tuning picture (normalization) is very > important . > >> New release is used for decoder v4l2convert but that is no very > clear > >> solution for my situation because this is library some time is > >> generating core dump and stop production line (very often if is > using > >> with V4L1). Also converter is get more resources CPU and > memory. On my > >> visio systems based on Beagleboard the resources is very > important for > >> robotic speed. > >> I post this issue because I can't solve for 20 minutes and not > follow > >> from long time new commitments. > >> About git try with qgit or qgit4 graphics user interface > program and > >> save the time for understanding git. Yes is possible to get old > revision. > >> > >> мЕЛ ДЕО > >> Bobby > >> > >> Stefan Krastanov wrote: > >> > >>> Hello, > >>> > >>> On љ0C45:6270 with MT9V011 it's also not working(checked with > >>> v4l2ucp). I have reported it, but failed to give details - I > was more > >>> interested in another problem. > >>> > >>> I have some time so I can check in exactly which version the > support > >>> regresses but I will need at least some initial time interval > in which > >>> to begin the search. And also, I'll be happy if you can tell > me how to > >>> row back to old versions using git (based on date if it's > possible) - > >>> if not I'll dig in the man page ;) > >>> > >>> Best Regards > >>> Stefan Krastanov > >>> > >>> 2009/3/14 Boris Borisov <[email protected] > <mailto:[email protected]> <mailto:[email protected] > <mailto:[email protected]>>> > >>> > >>> > >>> љ љ Hello, > >>> љ љ Can you check the brightness and contrast functions, > because for > >>> љ љ me this > >>> љ љ functions is broken. > >>> љ љ Really i call sn9c20x_set_contrast with different values > of brightness > >>> љ љ and contrast via sys-fs and V4l functions (ekiga) but > brightness and > >>> љ љ contrast is not changed. > >>> љ љ On very old version (who I use) this functions is working. > >>> > >>> љ љ Best regards > >>> љ љ Bobby > >>> > >>> > >>> > >>> > >>> > >>> > >> > > > > > > > > > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ Lets make microdia webcams plug'n play, (currently plug'n pray) To post to this group, send email to [email protected] Visit us online https://groups.google.com/group/microdia -~----------~----~----~----~------~----~------~--~---
