[mythtv-users] How do I get fast forward to work?
Michael T. Dean
mtdean at thirdcontact.com
Mon Apr 21 17:17:01 UTC 2008
On 04/21/2008 01:05 PM, Jesse Burt wrote:
> Could you please clarify? I'm not sure I understand what you've said...
> do you mean when you fast forward at 5x speed or faster that the video
> motion appears to skip several frames at a time (like a fast slideshow),
> instead of being smoothly played at a faster rate? If so, then as I
> understand it, and have experienced, this is the way it is supposed to
> look when fast-forwarding through these compressed videos. It isn't like
> hitting fast-forward on a VCR where everybody on screen appears as
> though they just downed a whole bottle of caffeine pills and everything
> just appears sped up. I could be wrong, but I think at least in some
> cases (like HD) it would take an enormous amount of processor power to
> be able to fast forward through the video butter-smooth at rates like 5x
> and faster, i.e., without skipping frames.
Not to mention, when you have a video meant to be played at 60fps and a
60Hz refresh on your display, you /must/ skip 48 of 60 (=80% of the)
frames per second to play back the video at 5x.
Even with a 120Hz display, you have to skip 36 of 60 (=60%) of the frames.
Mike
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