Hey Barry, Well that is certainly could be part of the problem, I was using mplayer to play back the video recorded onto the computer monitor. I wasn't too overly concerned with it as I thought it might be a playback issue. I certainly have a lot more trouble shooting to do before I figure out where the issue lies with this hardware. -Rob On Fri, Dec 18, 2009 at 3:17 PM, BOUWSMA Barry <freebeer.bouwsma@xxxxxxxxx> wrote: > On Fri, 18 Dec 2009, Robert Longfield wrote: > >> Ok so I ran a live CD on my windows box and there were no sync >> problems. I installed the latest Ubuntu CD and dual booted my windows >> machine and there was no sync problems but there was other issues, >> many tiny black lines on edges during fast movement when I did a $ cat >> /dev/video0 > foo.mpg. > > This sounds like an interlacing issue -- I suspect you are using > some player that delivers 25 full frames per second to your > display instead of somehow getting 50 partial fields from them > or interpolating the fields into 50 frames per second. > > This is fairly normal when not dealing with progressive material > (720p HD video, or 1080i HD or even SD video taken from source > material such as film shot at 24 fps). Most players have options > to enable one of any number of deinterlacers, some of which work > better than others for selected movement. (There are many > different commandline options for `mplayer', one of which will > present the fields of a 576i video as 288-line images which helps > decipher fast-scrolling text, for example.) > > If you are reproducing your video at your display's native > resolution without zooming it to fullscreen, you can see each > of the jagged lines matching one pixel vertical resolution. > > > barrry bouwsma > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
