[mythtv-users] SDI with embedded audio and MythTV

Brian Wood beww at beww.org
Fri Feb 20 18:38:39 UTC 2009


On Friday 20 February 2009 11:33:16 Matt Christy wrote:
> >-----Original Message-----
> >From: mythtv-users-bounces at mythtv.org
>
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Nick Rout
>
> >Sent: Thursday, February 19, 2009 7:27 PM
> >To: Discussion about mythtv
> >Subject: Re: [mythtv-users] SDI with embedded audio and MythTV
> >
> >
> >Just a point (and interesting to see a commercial company favouring
> >mythtv, good on you).
> >
> >I don't know much about SDI, but is the video and audio already a
> >mpeg2 stream (perhaps delivered over SDI), if not you will need to be
> >encoding it either in hardware or software.
>
> SDI is uncompressed audio/video. The idea was to have either the
> harwdare encoder or the software encoder encode the signal as it's
> recording. I guess I assumed that if I was able to get an SDI signal
> into the box (by using a card that can take SDI in), MythTV would take
> the uncompressed audio/video and make and MPEG-2 files. This is
> assumption wrong? :) (I'm fairly new to this.. so excuse my ignorance).

Myth can use some uncompressed sources, like the cheap "frame grabber" cards, 
and encode it. I believe that RTJpeg and MPEG4 are the only options for 
Myth's software encoding. You would have to transcode the result to get 
MPEG2.

But I don't think Myth can encode an SDI signal, nor am I aware of a good way 
to get an SDI stream into a Myth box.

-- 
beww
beww at beww.org


More information about the mythtv-users mailing list