[mythtv-users] Miro DC10

[Mark J. Small]

On March 19, 2006 11:37 am, Martijn Morriën wrote:
> Sort of short description:
> Motion JPEG is a video codec where each video field is separately
> compressed into a JPEG image.
>
> As long as this is done by the hardware there is no performance issue, the
> issues you may have are e.g.:
> - the size is larger than MPEG
> - direct burning to dvd is not possible (needs to be re-encoded to MPEG)
>
> MPEG-2 (1994) is the designation for a group of coding standards for
> digital audio and video, agreed upon by MPEG (Moving Pictures Experts
> Group). An MPEG-2 video bitstream is made up of a series of data frames
> encoding pictures
>
> For more info read e.g.:
>
>  http://www.answers.com/topic/mjpeg
> http://en.wikipedia.org/wiki/Mpeg
> http://en.wikipedia.org/wiki/MPEG-2
>
> For MythTv I have no idea how good such an MJPEG card is supported,
> probably it will be used to encode to the nuv format if the device is
> supported by video4linux.
>
> Martijn
>
> On 3/19/06, Dave Chapman <linux-lists at ntlworld.com> wrote:
> > On Fri March 17 2006 08:45, Martijn Morriën wrote:
> > > You are aware of the DC10 specs?
> > > It doesn't contain a tuner, so you need an external one
> >
> > That's OK want to use it with a cable STB
> >
> > > and it captures in
> > > Motion JPEG, not MPEG
> >
> > Excuse my ignorance but what's the difference and is it a good thing.
> >
> > > Maybe this is of any use:
> > > http://usuario.cicese.mx/~mirsev/Linux/DC10plus/
> > >
> > > http://mjpeg.sourceforge.net/
> > >
> > > To load it at boottime you could add the modprobe line to rc.local
> > >
> > >
> > > Martijn
> > >
> > > On 3/15/06, Dave Chapman <linux-lists at ntlworld.com> wrote:
> > > > Anybody have experience of using the Miro DC10 in Mythtv ?
> > > > I ahve put together a box with one of the old DC10 cards with the
> >
> > Zoran
> >
> > > > chip
> > > > zr36057
> > > > And need a little help tweaking the install.
> > > > The module loads with "modprobe zr36067 card=0" but I need to get it
> >
> > to
> >
> > > > load
> > > > at boot time.
> > > >
> > > > The display that I get is as if looking through a Venetian blind.
> > > > Horizontal
> > > > lines about 10cm wide
> > > >
> > > > What capture quality settings would work best.
> > > >
> > > > Box is a Debian testing with the amicus script
> > > >
> > > >
> > > > Many thanks
> > > > Dave
> > > > _______________________________________________
> > > > mythtv-users mailing list
> > > > mythtv-users at mythtv.org
> > > > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users


I briefly used a Matrox G400 + Rainbow Runner G combo for mythtv.  It also 
recorded using the MJPEG format.  I had many, many problems.  The biggest 
problem was that the file size was HUGE.  I ended up messing around with low 
resolutions and UGLY pictures.  I also did automatic transcoding.    Decoding 
the files took some serious horsepower as well, so livetv was difficult.

There was some weird voodoo involved in getting the drivers loaded as well. I 
don't even remember the cause, but after any reboot, a had to fight the 
machine for at least half an hour.  Then all would be well until the next 
power outage.  

I ended up giving up and getting 3 hauppauge freestyles from ebay.  I haven't 
looked back.

Mark