Funzionano tutti e tre i comandi e danno l’immaginre “dritta”,ma tutti e tre (se ho letto bene) danno un errore.Posto il primo dei tre output,se servono gli altri li posto.
[quote]
$ mplayer -flip tv:// -tv driver=v4l2:device=/dev/video0:outfmt=yv12:width=160:height=120:fps=50
MPlayer 1.0rc2-4.1.2 © 2000-2007 MPlayer Team
CPU: Intel® Core™2 Duo CPU T7700 @ 2.40GHz (Family: 6, Model: 15, Stepping: 11)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing tv://.
TV file format detected.
Selected driver: v4l2
name: Video 4 Linux 2 input
author: Martin Olschewski [email protected]
comment: first try, more to come 
v4l2: ioctl get standard failed: Invalid argument
Selected device: USB 2.0 Camera
Capabilites: video capture streaming
supported norms:
inputs: 0 = Camera 1;
Current input: 0
Current format: YUYV
v4l2: ioctl set format failed: Invalid argument
tv.c: norm_from_string(pal): Bogus norm parameter, setting default.
v4l2: ioctl enum norm failed: Invalid argument
Error: Cannot set norm!
Selected input hasn’t got a tuner!
v4l2: ioctl set mute failed: Invalid argument
[VO_XV] It seems there is no Xvideo support for your video card available.
[VO_XV] Run ‘xvinfo’ to verify its Xv support and read
[VO_XV] DOCS/HTML/en/video.html#xv!
[VO_XV] See ‘mplayer -vo help’ for other (non-xv) video out drivers.
[VO_XV] Try -vo x11.
Opening video decoder: [raw] RAW Uncompressed Video
VDec: vo config request - 160 x 120 (preferred colorspace: Packed YUY2)
Could not find matching colorspace - retrying with -vf scale…
Opening video filter: [scale]
VDec: using Packed YUY2 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 1
SwScaler: reducing / aligning filtersize 1 -> 1
[swscaler @ 0x876e990]SwScaler: BICUBIC scaler, from yuyv422 to rgb32 using MMX2
[swscaler @ 0x876e990]SwScaler: using 4-tap MMX scaler for horizontal luminance scaling
[swscaler @ 0x876e990]SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling
[swscaler @ 0x876e990]SwScaler: using n-tap MMX scaler for vertical scaling (BGR)
[swscaler @ 0x876e990]SwScaler: using MMX YV12->BGR32 Converter
[swscaler @ 0x876e990]SwScaler: 160x120 -> 160x120
VO: [x11] 160x120 => 160x120 BGRA [flip]
Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)
Audio: no sound
Starting playback…
V: 0.0 136/136 ??% ??% ??,?% 0 0
MPlayer interrupted by signal 2 in module: video_read_frame
MPlayer interrupted by signal 8 in module: free_demuxer[/quote]