[Theora] trying to encode from dvd using mplayer
dvdkhlng at gmx.de
Tue Dec 14 01:21:48 PST 2004
>>>>> "zikzak" == zikzak <zikzak at tele2.fr> writes:
> I added the ti.sharpness and the keyframe you mentioned before and I
> must say that it is a big help. I have a much better image in the
> output file and I can increase the video quality option one more step
> (from 6 to 7 in my test). Does the new keyframe value is saving bytes
Don't know. Just used those values since they are closer to the default
keyframe distances used by mencoder for encoding to MPEG4/DivX. In
theory it should give some improvements. Too large keyframe distance
might cause certain artefacts, but since I was never able to spot one of
these, I assume that Theora is designed for this kind of use...
If you have particularly noisy input data you might also try to play
around with `ti.noise_sensitivity'... but using mplayer's denoise
filter (for example: `-vf hqdn3d=2:2:2') might give better quality.
BTW encoding time can be shortened a lot by using the theora-mmx branch.
Last time I tried it, it worked quite well and the resulting files could
be played back flawlessly with the normal theora.
Try: (not sure about that)
svn co http://svn.xiph.org/trunk/theora-mmx
GnuPG public key: http://user.cs.tu-berlin.de/~dvdkhlng/dk.gpg
Fingerprint: B17A DC95 D293 657B 4205 D016 7DEF 5323 C174 7D40
More information about the Theora