[mythtv-users] Quicktime 1080p mov files smoother than 720p mkv (Debian)

[Jongi]

I got the mov files from the apple trailers site. the mkv is a grand
prix from last year I got from a friend.


On Fri, 2009-04-03 at 13:56 -0700, Robert McNamara wrote:

> On Fri, Apr 3, 2009 at 1:51 PM, Jongi <jongitech at gmail.com> wrote:
> >
> >
> > On Wed, 2009-04-01 at 15:11 -0700, Robert McNamara wrote:
> >
> > 2009/4/1 Jongi <jongitech at gmail.com>:
> >> I ran a 1080p Quicktime mov file on my box from harddrive (Asus M3N78-VM
> >> M/B
> >> with video over HDMI) and the playback is smooth. However when I run 720p
> >> mkv files there is some jerkiness. Both are playing over "mplayer -fs
> >> -zoom
> >> -quiet -vo xv %s". How should I be running the mkv files? And can I set
> >> global player settings to that and not impact mov files negatively?
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> >>
> >>
> >
> > MOV and MKV are just containers, they don't give any information about
> > the data contained within.  Likewise, 720p and 1080p are just
> > resolutions and don't really mean anything with regards to playback.
> > I could generate a 480i file that would choke a supercomputer.  The
> > relevant pieces of information are codecs, bitrates, and encoding
> > options.  The Apple trailers are low (2-3 Mbit) bitrate CAVLC h.264
> > last I checked.  What bitrate and encoding options did you use when
> > encoding the MKV?  Is it CABAC h.264?  higher bitrate than 2-3 Mbit?
> > These are the things that make it hard to play, not the resolution or
> > container.
> >
> > Robert
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> >
> > I see I am using the 180.29 nvidia driver. From this site
> > (http://www.mythtv.org/wiki/VDPAU), I see that it say 180.44 supports VDPAU.
> > This is likely to be the problem?
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> >
> >
> 
> There's no problem with either driver, but you've managed to avoid
> answering any of the question I asked...
> 
> Robert
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