V4L TV Viewing: Difference between revisions

Revision as of 05:59, 2 May 2005

There is a large number of applications for watching tv; here are a few:

Some users report kaffeine can work even when the others don't.

1. Control the TV card

2. Test the video

3. Test overlay mode (capture card controls display -- easy on CPU)

4. Test grabdisplay mode (application controls display -- required for deinterlacing and other effects)

@@ Line 5: / Line 5: @@
 * [[tvtime]]
 * [[xawtv]]
-** xawtv -remote -noxv -c /dev/video0 -C /dev/vbi0
 * [[zapping]]
 Some users report kaffeine can work even when the others don't.
+====Common configuration and control commands====
+. Control the TV card
+:* v4lctl -c /dev/video1 list
+:* v4lctl setnorm ntsc-m
+:* v4lctl setfreqtab us-cable
+:* v4lctl setfreqtab us-bcast
+:* v4lctl setchannel 3
+:* v4lctl volume mute off
+:* v4lctl volume 100
+:* v4lctl audio stereo
+:* v4lctl -c /dev/video0 setattr 'chroma agc' on (bttv only)
+:* v4lctl -c /dev/video0 hue "100%"   (or "0%" -- same thing)
+:* v4lctl -c /dev/video1 bright "50%"
+:* v4lctl -c /dev/video2 contrast "45%"
+:* v4lctl -c /dev/video0 color "50%"
+. Test the video
+:* xawtv -hwscan
+:* xawtv -remote -noxv -c /dev/video0 -vbidev /dev/vbi0
+.  Test overlay mode (capture card controls display -- easy on CPU)
+:* xawtv -noxv -capture overlay
+:* xawtv -v4l1 -capture overlay
+:* xawtv -xvtv -capture overlay
+:* xawtv -xvtv_overlay on -capture overlay
+:* xawtv -xvtv_overlay off -capture overlay
+.  Test grabdisplay mode (application controls display -- required for deinterlacing and other effects)
+:* xawtv -noxv -capture grabdisplay
+:* xawtv -v4l1 -capture grabdisplay
+:* xawtv -xvtv -capture grabdisplay
+:* xawtv -xvtv_overlay on -capture grabdisplay
+:* xawtv -xvtv_overlay off -capture grabdisplay