Hi,
I'm a relatively new user to vdr and xine, and i've noticed when watching football or scenes with high action that the playpack is not smooth. It'snot a tearing issue, and I can get used toit,but when people comeover they have commented on the stuttering. The videodoes not pause, its morelike a shutter is closing and openeing kind of thing.
I think its because i'm running PAL, and fidixfb or xine is probably outputting 25fps instead of 50.
Err.. Any tips on how totweak this output? Here is the command I use to launch xine: --- /usr/local/bin/fbxine --stdctl -V vidixfb -A oss --no-lirc --post=expand:centre_cut_out_mode=1,black_bottom=2 --post=vdr -D vdr://tmp/vdr-xine/stream#demux:mpeg_pes ---
Eagerly awaiting a reply ;-)
Mick
In b98c6b1a050922090372d141ac@mail.gmail.com, mike lewis wrote:
Hi,
I'm a relatively new user to vdr and xine, and i've noticed when watching football or scenes with high action that the playpack is not smooth. It'snot a tearing issue, and I can get used toit,but when people comeover they have commented on the stuttering. The videodoes not pause, its morelike a shutter is closing and openeing kind of thing.
I think its because i'm running PAL, and fidixfb or xine is probably outputting 25fps instead of 50.
It could be interlacing. What graphics card have you got? Only certain Matrox cards can handle interlacing correctly. I haven't managed to get df_xine or fbxine working properly with mine though. If you've got a fast CPU (ISTM you need about 1.5GHz or better) try enabling xine's deinterlace filter.
On Fri, 23 Sep 2005 00:03:24 +0800 mike lewis lachlanlewis@gmail.com wrote:
I'm a relatively new user to vdr and xine, and i've noticed when watching football or scenes with high action that the playpack is not smooth. It'snot a tearing issue, and I can get used toit,but when people comeover they have commented on the stuttering. The videodoes not pause, its morelike a shutter is closing and openeing kind of thing.
I think its because i'm running PAL, and fidixfb or xine is probably outputting 25fps instead of 50.
Yes, that is very likely the cause, because you don't seem to be using a good deinterlacing algorithm. See how Reinhard Nissl runs Xine: http://www.linuxtv.org/pipermail/vdr/2005-May/001930.html
For 50 fps output you need to use Greedy2Frame. There may be other algorithms from tvtime that work better for some cases, but Greedy2Frame works very well generally. However, you can only use it on a progressive display like a CRT or LCD monitor, or a modern video projector. You should also set the screen refresh rate to 75 or 100 Hz.
For interlaced TV output the only choice is to use a deinterlacing algorithm that ouputs 25 fps video, and that will cause stuttering. Ideally the picture should not be deinterlaced at all for TV output, but only some Matrox cards can do that properly, and setting the driver up for Xine is quite hard. See: http://www.sci.fi/~syrjala/directfb/matrox-tv-out-howto
If you need to use television as a display device, I would recommend getting a dxr3/Hollywood+ or some FF DVB card and forget vdr-xine.
Regards,
Niko Mikkilä
On Thu, 22 Sep 2005 17:47:31 +0100 Tony Houghton h@realh.co.uk wrote:
It could be interlacing. What graphics card have you got? Only certain Matrox cards can handle interlacing correctly.
Yes, for TV-out. They also have hardware deinterlacing for VGA output (don't know if any drivers support it besides the old syncfb). However, it is done with a BOB algorithm, which is not nearly as good as Tvtime's Greedy2Frame on Xine.
If you've got a fast CPU (ISTM you need about 1.5GHz or better) try enabling xine's deinterlace filter.
For PAL resolutions Greedy2Frame works fine on a 600 MHz Athlon with cheap_mode set to 1 or 2. Motion is very fluid and progressive material like movies are sharper than on a TV -- without flicker.
Regards,
Niko Mikkilä
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mike lewis -
Niko Mikkila -
Tony Houghton