[MPlayer-users] Re: best encoder ?

Moritz Bunkus moritz at bunkus.org
Tue Jul 23 10:58:02 CEST 2002


> > > But scaling down means (visible) losses, right ?

You just have to find a good resolution for you. And that depends on
MANY things: target file size, compressability (quality of the source,
type of the source (e.g. action movie vs. classical concert)...),
intended target for playback, intended sound quality, movie length...

Target file size: bigger picture means a lot more bandwidth is required
to achieve the same quality. If you aim for one 700mb CD you might want
to scale the image down to a width of 500 to 650, again depending on
the source. If you aim for two CDs you probably don't need to scale as
you have a lot of bandwidth available.

Quality of the source: DVD vs TV capture...

Type of the source: Beautiful Girls needs a lot less bandwidth than
Lethal Weapon.

Target for playback: older computers can't cope with high resolutions.
My old P2 400 was able to play back up to a width of about 400.

Sound quality: if you want to include the full AC3 sound then you'll
have to save bandwidth --> lower resolution.

Movie length should be obvious.

So - almost everyone scales down the frames. It's just a matter of
finding the 'best' frame size in each case.

 ==> Ciao, Mosu (Moritz Bunkus)

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