[mythtv-users] Terrible MPEG4 Quality at 8000 Bit Rate

[mythtv]

Well, I dont have an mpeg2 card so I cant capture to mpeg2, or can I?
I am used to ripping and encoding DVD's on the PC. But not on linux. Also, I
cant even figure out how to make an mpeg2 form an rtjpeg?? any ideas?

My settings are weird. Tonight I recorded spongebob at the highest RTJPEG
settings and I am left with a 10Gig file for 30 minutes of video. 10 Gigs!  I
have recorded other shows at these settings and they were only 2Gig. I am not
sure what is going on.  I am not doing any transcoding after recording. I am
using 720x480 and leaving all other items as the defaults.

 I have an XP2100  with 512Mb of Ram..
ata133 160 Gig HD with 60mb/s transfer rates.

Bruce

Seth Lake wrote:

> ahh, your doing it on the fly.  yes, i capture to mpg2 and then mpg4
> transcode to archive stuff.  mine is set to 800b/r with a (i think) 1k max.
> mpg4 is much more cpu intensive then mpg2, and mpg4 looks a whole lot better
> when the encoder can look at the whole clip and get a feel for the movie (it
> can look ahead and encode based on later video, it can also do double or
> triple pass encode so that it looks better).  i'm not sure how myth's
> transcode works, but this is how the major DVD rippers get such a
> nice-looking final product, they start with the .VOB which is pretty much
> just a plain mpg2.
>
> what's ur cpu and other comp specs?  do you have the high-quality flags set
> for mpg4 (i wouldn't think this would matter too much at 8k)?  do you have
> pulldown (de-interlacing) and/or jitter control on?  (do they matter
> capturing or just playback?)
>
> try capturing to an mpg2 then transcoding to mpg4.
>
> ----- Original Message -----
> From: "mythtv" <mythtv at bruce.homelinux.com>
> To: "Discussion about mythtv" <mythtv-users at mythtv.org>
> Sent: Tuesday, December 02, 2003 8:32 PM
> Subject: Re: [mythtv-users] Terrible MPEG4 Quality at 8000 Bit Rate
>
> > Yeah, rtjpeg is very clear.
> > What settings do you have for the other settings for min/max bitrate?
> > Do you transcode afterwards? I dont.
> >
> > Anything else I should know?
> >
> > Thanks,
> >
> > Bruce
> >
> > Seth Lake wrote:
> >
> > > crap in, crap out.  is the source in good shape?  i encode to an 800
> stream
> > > for cartoons and it looks alright, mostly.  an 8K stream should be
> better
> > > than DVD quality.
> > >
> > > ----- Original Message -----
> > > From: <mythtv at bruce.homelinux.com>
> > > To: <mythtv-users at mythtv.org>
> > > Sent: Tuesday, December 02, 2003 10:41 AM
> > > Subject: [mythtv-users] Terrible MPEG4 Quality at 8000 Bit Rate
> > >
> > > > I expected lower resolution, but I have MPEG4 turned up to the max and
> I
> > > have terrible picture quality.
> > > > Pixelation the size of dimes all over the place. Anyone have any
> > > suggestions?
> > > >
> > > > Bruce
> > > >
> > >
> >
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