On Tue, 14 Oct 2008 19:56:05 +0400 Andrew Savchenko <Bircoph at list.ru> wrote: > Hi, > > On Tuesday 14 October 2008 12:45, Nicolas George wrote: > > Le tridi 23 vend?miaire, an CCXVII, Andrew Savchenko a ?crit?: > > > Well, perhaps -fontconfig should be enabled > > > by default if supported. > > > > Some time ago, I would have totally agreed with you, but no > > longer: there is something even better than -fontconfig: -ass. > > I'm aware of -ass support, but there is some problems with them: > 1) This is CPU-hungry rendering. I can feel this easly when > watching DVD's (without framedrops!) on my ancient laptop with > Pentium II-366 MHz on board. Uhmm.. -ass has no effect when watching DVDs, as DVDs do not have ASS subtitles. And a P-II 366 is at the lower limit for watching DVDs even if it's a desktop (you need a good and fast graphics card). Using a laptop which has a lot lower i/o bandwidth is at least problematic. (Note for those who do not know: the i/o bandwidth of PCs is at least as important as a fast CPU if not even more important for watching videos) > [...] > > The result is that if I enable -ass, the subtitles are rendered > > by libass, and look much nicer than the default ones. > > Well, this depends on fonts used by your fontconfig. Furthermore I > use -spuaa 4 for scaling OSD, so I can't feel difference with > -ass, but this variant is faster. Again, DVDs vobsub and ASS are mutaly exclusive. -spuaa doesnt apply to -ass. > > Furthermore, as I have a reasonably fast computer, I add > > "-vf-add dsize=1920:1200:0,scale=0:0" to get software scaling > > and have the subtitles rendered at the screen resolution. > > Fontconfig's subtitles may be easily scaled using > -subfont-text-scale and -subfont-autoscale option. I can't see the > difference either. The differnece is in the resolution you are rendering to. Using -vf dsize forces MPlayer to rescale the picture first before rendering the font, which results in much better resolution for the fonts, at the expense of an horribly huge CPU and I/O bandwidth consumption. > Note: I'm not objecting against libass, I use it occasionally > myself, but fontconfig seems to me to be a preferred way to go. Note: you are mixing up text subtitles with non-text subtitles. Attila Kinali -- If you want to walk fast, walk alone. If you want to walk far, walk together. -- African proverb
