[mythtv-users] How much space should transcoding HDTV to mpeg4 save?

Billy Macdonald billymacdonald at gmail.com
Mon Jan 22 05:04:56 UTC 2007

On 1/21/07, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
> On 1/19/07, ryan patterson <ryan.goat at gmail.com> wrote:
> > On 1/19/07, Phill Edwards <philledwards at gmail.com> wrote:
> > > > So I'm
> > > > not too interested in down sampling the resolution of my recordings.
> > >
> > > Then you're not really going to downsize the size of the files very much,
> > > then.
> >
> > Transcoding to a more efficient codec should allow smaller file sizes at the
> > same quality.  MPEG-4 is capable of achieving equal quality with a lower
> > bitrate compared to mpeg-2.
> Regular mpeg4(aka xvid)  for HDTV size doesn't have this advantage,
> which is where h264 comes in, but you would have to do the encode
> manually with mencoder (x264).

Also, a 1080i stream that you deinterlace to 1920x1080 will need more
bandwidth now that it is a progressive format in order to look good,
at least that is what I've discovered in my limited amount of
transcoding so far.

I'm still tweaking my HD transcoding settings.  Any plans to
incorporate the improved HD encoding codecs in mythtranscode?

More information about the mythtv-users mailing list