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I'm interested in mpeg-1 :) that's because VCD players are 1/3rd the price
of DVD players and CD's ten times lower in price than DVD's. Surely that
counts for something :) I'll see what I can do about it ! Seems rather simple,
just have to get around to it. That said I'll see if I can do something about
direct mpeg-2 encoding. There are other players which do have this option(as
I mentioned). If their options turn out to be useful on my machine (Athlon
T-Bird 950) then I will add them to myth If it is possible it will be a nice
thing to have. The rte library claims real-time software mpeg-1/2 encoding,
anybody used it folks ??<br>
<br>
Joseph A. Caputo wrote:<br>
<blockquote type="cite"
cite="mid200401271022.25997.jcaputo1@comcast.net">
<pre wrap="">On Tuesday 27 January 2004 09:55, Dhiraj Gaurh wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hello friends,
Some time ago I had written a mail to this list saying that it
would be very nice if we could encode in mpeg-1 (or 2 if you please)
directly, rather than encoding in mpeg-4 and later transcoding it to
mpeg-1. Many people on this list said that it is not possible to do
mpeg-1 encoding in software as it consumes too much CPU. It sounded
rather strange to me that it was possible to do live mpeg-4 encoding
but not mpeg-1. I thought since mpeg-4 compresses more so it should
require a faster CPU. It turns out that I was right. I was just
looking at the freevo page(another free Linux PVR application). It
says it is possible to do direct mpeg-1 VCD quality encoding using a
Celeron 400 MHz but mpeg-2 and mpeg-4 require more CPU power. This
seems to be a true statement. It is possible to directly make a VCD
file with Freevo, zapping or the standalone mp1e library.So now, if
you can't do live mpeg-4 encoding and you don't have enough disk
space to store your recorded RTJPEG or if you want to make a VCD
anyway and don't want to bother about transcoding from RTJPEG/mpeg-4
to mpeg-1, you can do it !! That's really nice. It will be quite nice
if we include direct mpeg-1/2 encoding support into mythtv. That
would be a very nice and useful addition. Let me see what I can do
about it. If I get some time. It will take a few months if I have to
do it myself though. The actual work itself shouldn't take a lot of
time though. The encoder is already there, you just need to put a
hook into mythtv to make use of it. Seems rather simple to me.
Perhaps there are reasons why mythtv would not want to use mp1e or
rte but I am not aware of them. As far as I know, they are open
source.
</pre>
</blockquote>
<pre wrap=""><!---->
I believe the previous thread was regarding software MPEG-2 encoding
only, and I believe that most folks don't have the power required to do
realtime MPEG-2 encoding in software. MPEG-1 was never really brought
up because most people don't seem to be interested in the limited
quality you get out of a VCD-compliant MPEG-1 stream. VCD is
fixed-bitrate (1150 or 1250 IIRC) and the quality is not all that
great, IMHO. MPEG-2 is desirable because it used in both the SVCD and
DVD standards, which both allow for better quality, higher bitrates and
(for DVD) multiple resolutions.
That said, I'm certainly not against MPEG-1 if someone wants to do the
code, but I suspect you'll find little interest in adding the support.
-JAC
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</pre>
</blockquote>
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