Difference between dvi and s-video

I set up my bb xm with driver for a frame grabber, developed an application, bla… bla…
I used the dvi mode for better view during development.

Now I changed to s-video, but the frame grabber doesn’t work anymore. The command I use is:

mplayer -vo omapfb /dev/video0:input=1 tv:// -fs

in s-video mode, I get this output:

MPlayer2 2.0-379-ge3f5043 (C) 2000-2011 MPlayer Team
162 audio & 361 video codecs

Playing /dev/video0:input=1.
File not found: ‘/dev/video0:input=1’
Failed to open /dev/video0:input=1.

Playing tv://.
Detected file format: TV
Selected driver: v4l2
name: Video 4 Linux 2 input
author: Martin Olschewski olschewski@zpr.uni-koeln.de
comment: first try, more to come :wink:
Selected device: EasyCAP DC60
Capabilities: video capture audio read/write streaming
supported norms: 0 = PAL_BGHIN; 1 = NTSC_N_443; 2 = PAL_Nc; 3 = NTSC_N; 4 = SECAM; 5 = NTSC_M; 6 = NTSC_M_JP; 7 = PAL_60; 8 = NTSC_443; 9 = PAL_M; 10 = PAL_BGHIN_SLOW; 11 = NTSC_N_443_SLOW; 12 = PAL_Nc_SLOW; 13 = NTSC_N_SLOW; 14 = SECAM_SLOW; 15 = NTSC_M_SLOW; 16 = NTSC_M_JP_SLOW; 17 = PAL_60_SLOW; 18 = NTSC_443_SLOW; 19 = PAL_M_SLOW;
inputs: 0 = CVBS0; 1 = CVBS1; 2 = CVBS2; 3 = CVBS3; 4 = CVBS4; 5 = S-VIDEO;
Current input: 0
Current format: UYVY
tv.c: norm_from_string(pal): Bogus norm parameter, setting default.
Selected input hasn’t got a tuner!
vo: couldn’t open the X11 display (localhost:10.0)!
[omapfb] Could not open X, overlay only…
[ass] auto-open

Opening video decoder: [raw] RAW Uncompressed Video
Could not find matching colorspace - retrying with -vf scale…
Opening video filter: [scale]
Movie-Aspect is undefined - no prescaling applied.
[swscaler @ 0x40f72390]using unscaled uyvy422 → yuv420p special converter
VO: [omapfb] 640x480 => 640x480 Planar YV12 [fs]
[omapfb] Error mmap
FATAL: Cannot initialize video driver.
VDecoder init failed :frowning:
Opening video decoder: [ffmpeg] FFmpeg’s libavcodec codec family
Selected video codec: [ffrawuyvy] vfm: ffmpeg (RAW UYVY)

Audio: no sound
Starting playback…
Movie-Aspect is undefined - no prescaling applied.
VO: [omapfb] 640x480 => 640x480 Planar YV12 [fs]
[omapfb] Error mmap
FATAL: Cannot initialize video driver.

FATAL: Could not initialize video filters (-vf) or video output (-vo).

v4l2: 4 frames successfully processed, 223 frames dropped.

Exiting… (End of file)

But /dev/video0 is still there.
Reboot in dvi mode, the same command works again.

So, what are the differences between the two modes? I thought it is just the video output but it seems it changes something other!
Thanks in advance

Sorry for “upping” this thread, perhaps it has gone unnoticed.