| BGD |
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| Joined: 18 Jan 2008 |
| Posts: 8 |
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To get a better picture I adjusted all my Video 4 Linux attributes of brightness, contrast, etc. They were different than the defaults for whatever reason and resulted in a washed out terrible looking picture.
The command you need is "v4lctl -c /dev/videoX list" (with X being the card you wish to adjust) and this is executed from the backend server that has the tuners you wish to adjust.
bryan@granola:~# sudo v4lctl -c /dev/video0 list
attribute | type | current | default | comment
-----------+--------+---------+---------+-------------------------------------
norm | choice | NTSC-M- | PAL-BG | PAL-BG PAL-DK PAL-I PAL-M PAL-N PAL-Nc PAL-60 NTSC-M NTSC-M-JP NTSC-443 SECAM-DK SECAM-L
input | choice | Televis | Televis | Television Composite1 S-Video
audio mode | choice | mono | mono | mono stereo lang1 lang2
bright | int | 165 | 127 | range is 0 => 255
contrast | int | 25 | 63 | range is 0 => 255
color | int | 51 | 127 | range is 0 => 255
hue | int | 127 | 127 | range is 0 => 255
volume | int | 63 | 63 | range is 0 => 63
Balance | int | 64 | 64 | range is 0 => 127
mute | bool | off | on |
Setting all the attributes to the defaults was a step in the right direction:
bryan@granola:~# sudo v4lctl -c /dev/video0 setattr 'bright' 127
bryan@granola:~# sudo v4lctl -c /dev/video0 setattr 'contrast' 63
bryan@granola:~# sudo v4lctl -c /dev/video0 setattr 'color' 127
I thought this might help some poor soul out there having the same problem. Adjusting the driver works MUCH better than the suggestion on some websites of settings for each channel in Myth.
Hope this helps!
EDIT:
Hmph have to tweak each channel regardless  Setting all the channel brightness, etc to 0% will leave your manual configuration of the v4l settings alone. For example:
mysql -u mythtv -pmythtv -hyourhost mythconverg
mysql> update channel set contrast=0,brightness=0,colour=0,hue=0;
mysql> exit; |
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