Le tridi 23 vend?miaire, an CCXVII, Andrew Savchenko a ?crit?: > Fontconfig's subtitles may be easily scaled using > -subfont-text-scale and -subfont-autoscale option. I can't see the > difference either. I think you misunderstood what I was saying. Let me add some details. The default behaviour, at least with XVideo, is to do thing in that order: video decoding -> subtitles rendering -> scaling -> display with scaling and display taking place both inside the video card. That means that the glyphs are rendered at the resolution of the video and then scaled as bitmap to the resolution of your screen. Suppose the video is 640?360 while the screen is 1920?1200. With a reasonable font size, that means that the glyph will have an average width of about 10?pixels, maybe less. That is enough to have something readable (the font I use to compose this message is a fixed-width 7 pixels wide bitmap font), but not something nice. On the other hand, if you do things in that order: video decoding -> scaling -> subtitles rendering -> display the subtitles are rendered at the screen resolution. With my previous hypotheses, that makes the glyphs about 30?pixels wide on average, which starts to be on par with printed text and looks _much_ nicer. There are drawbacks. With XVideo overlays, you can do nothing between hardware scaling and display, which means that to render the subtitles after the scaling, the scaling has to be done by the CPU. This eats a lot of CPU time. Fortunately, modern CPUs can mostly cope with that, except maybe if the video itself is HD and is already needing all the speed. Furthermore, with Intel video controllers and default builds of X.org, the XVideo is limited to 1920?1088. If your video has 4:3 aspect ratio, you may want to scale it to 1600?1200, but you can not. It is perfectly ok to patch the driver. This may cause mplayer to die unexpectedly if you try to play such videos through the network with 16?bpp and an old version of the X.org server, though. With the GL output drivers, it is possible to add subtitles after hardware scaling. Unfortunately, having a X11 server with working OpenGL is much harder than having a X11 server with working XVideo. Furthermore, with Intel video controllers (at least mine), which is the easiest way to get OpenGL working, GL output has some tearing, while XVideo overlay does not. All things considered, I intend to keep using -vo xv -vf-add dsize=1920:1200,0,scale=0:0 when I have subtitles, until I find myself with a video where decoding is too slow. Regards, -- Nicolas George -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 197 bytes Desc: Digital signature Url : http://lists.mplayerhq.hu/pipermail/mplayer-users/attachments/20081015/533ed80a/attachment.pgp
