[mythtv-users] [OT] Trancoding 'live'
chrisribe at gmail.com
Sun Dec 4 21:14:41 EST 2005
Just to add a data point, in my experience on my 1Ghz PIII, transcoding from
720p to 720x480 took about 6 minutes per minute of video.
On 12/4/05, Chris Ribe <chrisribe at gmail.com> wrote:
> If your processor could handle HD decoding, your video card would handle
> the downconverting on playback. You could avoid the digital-analog-digital
> round trip while still using your current display.
> I don't know how much recording you do on a daily basis, but transcoding
> from HD to SD will probably take you 3 hours for every hour of video
> On 12/4/05, glen martin <lists at locutory.org> wrote:
> > Chad wrote:
> > >On 12/4/05, Chris Ribe <chrisribe at gmail.com> wrote:
> > >
> > >
> > >>The best bang for the buck upgrade path is probably to just upgrade
> > the CPU
> > >>on your frontend to something that can handle HD decoding.
> > >>
> > >>
> > >I completely agree. I can't seem to find a STB that works with ATSC
> > >that is less than the cost of a AMD64 3200 (which is enough power to
> > >decode a HD stream). I'd rather fork over the ~200 bucks to build a
> > >high def capable frontend than feed something into something, and then
> > >that something out to something, which may be capable of then
> > >reconverting that something into something (where something is analog
> > >or digital depending on where it's placed ;) ).
> > >
> > :) Put it like that and I have to agree.
> > The other angle is the 'something that can handle HD decoding' is
> > probably non-silent. My existing frontend is an EPIA, and diskless. And
> > then there is 'something that can *display* HD', and that is the 40 or
> > 50 inch 16:9 plasma than I haven't quite got around to buying yet, and
> > probably won't for a while.
> > Downconverting ATSC to 480i and displaying on my 32-inch analog TV,
> > while less than ideal, still gives me the aspect ratio while I wait for
> > the opportunity to spend several thousand $ on new equipment. Hence,
> > transcoding, at least for the next year. But I suppose would take
> > massive code changes plus a 200-300 watt CPU :) to transcode in real
> > time.
> > The usual transcoding route, waiting for shows to finish and then
> > covert, would seem to work fine most of the time. And the external HD
> > tuner with 480i output would seem the best choice for shows that can't
> > wait. Or maybe just run the external tuner direct into the TV and forego
> > pause ... :/
> > Thanks to all for your comments.
> > glen
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