[Theora] Slowdown on lots of motion

John Kintree jkintree
Fri Jun 18 10:29:16 PDT 2004

On Friday 18 June 2004 04:17 am, J.B. Nicholson-Owens wrote:
> I'm playing the "Honey" movie (both Honey-small and Honey-large) and I
> notice significant slowdown during periods of lots of motion (when the
> ......
> This suggests to me that I'm playing movies which require a faster machine

When playing Honey-large.ogg on my machine it's kind of jerky, almost like a
slide show.  The clarity of each frame is good enough, it's just not smooth

My machine is a 750 MHz AMD Duron with 128 MBytes of RAM, and running Mandrake
10.0.  This release of Mandrake came with Mplayer 9.0, and I could only get
the audio for the theora sample files with that version of Mplayer.  I used
urpmi to install Mplayer 1.0pre4, and then I could see the theora video as
well as hear the audio.

BTW, I just updated to the beta of RealPlay 10 for Linux, and watched the
trailers at http://www.realnetworks.com/products/codecs/realvideo.html

The 450 kbps version of Harry Potter 3 plays well and looks pretty good on my
machine.  That file is 4.5 MBytes and plays for 1 minute 23 seconds, or about
3.25 MB/minute.  Some of it is just titles, but that is still a very nice

Honey-large.ogg is about 680 MB, and plays for about 88 minutes.  That amounts
to about 7.7 MB/minute.

I would suggest that video that looks as good as in RealPlay 10 on hardware as
modest as mine, and with files as small as 5 MB/minute would be a target for
theora.  Based on what I've seen with this first stable release of theora,
I'm encouraged.
John Kintree

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