From: Ronny B. (nny at domain purehatred.org)
Date: Wed 18 Sep 2002 - 16:44:03 IST
On Wed, Sep 18, 2002 at 03:18:57PM +0100, John P. Looney wrote:
> Is it possible to make a reasonable-quality video, then rip & encode the
> thing on linux ?
I'd say use an MPEG-2 encoder for the permanent encoding[1], and rip to
DivX with MEncoder (part of MPlayer) with settings around 128kbit for
sound, 800-1000 kbits for the video (or 2000 if you have the space).
Useful flags include -vop scale=640:480 (or 320:240), if it's a hi-res
image, and "vhq:q=5" in the video encoder settings.
Note that there are many DivX variants; the docs (DOCS/encoding.html)
mention which encoder is the fastest/highest quality. I think the native
codecs now beat the Win32 codecs for speed and quality.
> Recommendations for hardware needed would be appreciated.
My Duron 750 manages about 20fps encoding at vbitrate 1000 and 128kbit
sound. I sort of miss having Ogg Vorbis as an output option, since it
seems faster than LAME MP3 on my system :/
I'd say a 1GHz computer could do realtime encoding; 1.5GHz wouldn't have
trouble at all. Going from 640x480 to 320x240 (or proper S-VHS/VHS
resolutions like 358x288) tends to increase the speed 20% or so.
And do nag the developers about Vorbis if you desire it ;)
[1] Unless you already have it on tape in a decent format; MPEG-2
is about 12 times the size of the standard DivX rate
-- O-RB, too much time on his hands
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