[MPlayer-users] My cropping question revisited.
gheskett at wdtv.com
Thu Sep 26 23:04:19 CEST 2013
On Thursday 26 September 2013 16:53:52 Reimar Döffinger did opine:
> On 26.09.2013, at 22:37, Reimar Dأ¶ffinger <Reimar.Doeffinger at gmx.de>
> > On 25.09.2013, at 23:52, Gene Heskett <gheskett at wdtv.com> wrote:
> >> I did some fiddling 2 days back, before I tore up a knee and am
> >> reduced to using crutches to get around.
> > Hope you'll manage to get rid of those crutches soon!
> >> 1, mplayer idents the camera ok, but cannot connect.
> >> Its identified in the log as input: HD Pro Webcam C920 as
> >> /devices/pci0000:00/0000:00:1d.7/usb1/1-6/1-6:1.0/input/input10
> >> And seems to claim its a 2304 by 2xxx pixel device.
> > Unless someone managed to get MPlayer to work with exactly that card,
> > I think you'd need to give us the exact and complete MPlayer output to
> > start. (and yes, updating to latest SVN does not hurt either).
> >> 2, it would appear that libv4lconvert.so may be one of the stumbling
> >> blocks.
> > For many webcams MPlayer should not need it, since it can do the
> > necessary conversion, at most it needs to be told how to figure out
> > which to use.
> > Though if you are unlucky it might indeed be one of the cams that
> > simply don't work with MPlayer.
> Tells me the camera can do yuv, h.264 and mjpeg.
And those formats are exactly the ones that return a black screen. I
thought it odd that no format of yuv or mjpeg worked. There is also a
lengthy list of "unidentified" formats which only return the pixel x pixel
size but give black screens with libv4lconvert, an older version in the
processing chain that camunits uses. What other names might h.264 be known
as to a library built in 2010? Or is that too new for that time frame?
> MPlayer can do all of them without libv4lconvert.
One of the reasons I'd like to see it working.
> Which one is best depends on the ratio USB bandwidth/cpu power
> available. I also have to admit I don't know how to tell MPlayer which
> one to select.
Obviously neither do I... CPU power available is likely a problem since
this portion of the software runs on a single core of the dual core an atom
has, at 1.6ghz IIRC. IOW, it does everything but actually drive the
Thank you Reimar.
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
When the politicians walk around with their hands in their own
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
More information about the MPlayer-users