Re: [vdr] Advice on new motherboard, xineliboutput, vdpau, hdmi video & audio, etc.
On Fri, Aug 20, 2010 at 01:37:10AM +0300, Niko Mikkilä wrote: > Thu, 2010-08-19 at 20:54 +0400, Goga777 wrote: > > > Computer hardware usually cannot provide 50.000Hz, 59.940Hz or 23.976Hz > > > outputs to your TV/Monitor. This will cause some judder on display output > > > as MPEG/AVC input-stream is not synchronized to output framerate. > > > > do you mean that all nvidia vdpau cards with existing drivers from Nvidia > > can't provide exact 50.000Hz, > > 59.940Hz or 23.976Hz ?? > > There is no graphics card, BD/DVD player or other standalone device that > outputs those rates exactly. I don't know how much they deviate, but I'd > guess it's usually something like 0.01 % (50.005 Hz instead of 50 Hz), > as Jori said. > > However, the rate doesn't need to match exactly because the display > device is synchronized to the video signal. The rate could be 50.1 Hz or > maybe even 51 Hz and the display wouldn't mind. 50 fps video files would > play slightly faster, but there would be no need to drop video frames > because of that. > > Things are more problematic when receiving live broadcast. Then the > display and the video source (graphics card and software) needs to be > synchronized to the broadcast to avoid dropping or duplicating frames. > Set-top digital television boxes and FF DVB cards do that, but most > graphics cards/drivers can't because they aren't designed to follow an > external time source. > > Audio playback synchronation is another issue, and somewhat difficult to > handle properly on a PC where the audio chip's clock is almost always > separate from the graphics card's clock. By default, many media players > time everything according to the audio clock, and therefore they need to > drop/duplicate video frames every now and then. The other alternative is > to drop/duplicate audio frames or resample the audio completely. > I assume you guys are aware of projects like: http://frc.easy-vdr.de/ It was originally started to get perfectly synced RGB output from a VGA card (to PAL TV), just like from FF DVB card. I haven't really used that myself, but afaik they've been working on making that exact synchronization (variable framerate) possible with new HD/VGA/DVI outputs aswell. -- Pasi ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
[vdr] vdr-1.7.15 dvb-t channel mismatch
Hi, reststarting my vdr activities I went into trouble with dvb-t channels.conf for Berlin. Just took the channels from: http://www.vdr-wiki.de/wiki/index.php/Channels.conf_DVBT-De-Berlin-Brandenburg There is the following entry for ARTE: arte;ARD:191500:I999B7C23D12M16T8G8Y0:T:27500:201:202=deu,203=fra:204:0:2:8468:0:0 I was able to tune and watch tv on this channel, but there was no EPG available. VDR created the following new entry in channels.conf: arte;ARD:19150:B7C23D12G8M16T8Y0:T:0:0:0:0:0:2:8468:257:0 Tuning to this VDR generated channel shows now the EPG information, but no video and no sound :-(. -- Stefan Lucke ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
[vdr] speeding up vdr+xine on an old Pentium4
Hi, I´ve taken an old PC (Intel graphics card on board, p...@553mhz, 512Megs of RAM) and installed mms, vdr and lirc basically. Everthing works fine but I see cpu utilization in the region of 90% (this is with SD, I have no delusions about HD channels on this hardware) At the moment it is connected to a monitor, so I have a feeling it goes for the maximum resolution. Eventually it will be connected to an old 28 inches TV (CRT not LCD) with an adaptor VGA to RCA Any tips on how I could speed things up? Xine settings? Xorg settings? vdr settings? xv or opengl? ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] vdr-1.7.15 dvb-t channel mismatch
Hi, Am 21.08.2010 22:06, schrieb Stefan Lucke: reststarting my vdr activities I went into trouble with dvb-t channels.conf for Berlin. Just took the channels from: http://www.vdr-wiki.de/wiki/index.php/Channels.conf_DVBT-De-Berlin-Brandenburg There is the following entry for ARTE: arte;ARD:191500:I999B7C23D12M16T8G8Y0:T:27500:201:202=deu,203=fra:204:0:2:8468:0:0 I was able to tune and watch tv on this channel, but there was no EPG available. VDR created the following new entry in channels.conf: arte;ARD:19150:B7C23D12G8M16T8Y0:T:0:0:0:0:0:2:8468:257:0 Tuning to this VDR generated channel shows now the EPG information, but no video and no sound :-(. What happens with this entry (adding the TID of the vdr-generated entry): arte;ARD:191500:I999B7C23D12M16T8G8Y0:T:27500:201:202=deu,203=fra:204:0:2:8468:257:0 Lars. ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] speeding up vdr+xine on an old Pentium4
On 21 August 2010 22:41, wrote: > I´ve taken an old PC (Intel graphics card on board, p...@553mhz, 512Megs of > RAM) and installed mms, vdr and lirc basically. > > Everthing works fine but I see cpu utilization in the region of 90% [..] > Any tips on how I could speed things up? Xine settings? Xorg settings? vdr > settings? xv or opengl? Try to verify if colour conversion is actually done by the hardware graphics card (through Xv), and not in software. Running on a 533MHz processor could be stretching things though, especially for a P4. -- -Tor ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] speeding up vdr+xine on an old Pentium4
Hi, Some intel cards supports afaik xvmc as well. Check if this is available for your card and use it. That way some parts of the mpeg stuff will be decoded by the gpu. If this isn't available for your card, use xv. HTH. halim ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] speeding up vdr+xine on an old Pentium4
On Sat, 21 Aug 2010 22:41:32 +0200 wrote: > I´ve taken an old PC (Intel graphics card on board, p...@553mhz, 512Megs of > RAM) and installed mms, vdr and lirc basically. Do you mean P3 or have you mistyped the clock speed? The slowest P4 was about 1400MHz, I thought. Surely one wouldn't be underclocked by such a huge factor. -- TH * http://www.realh.co.uk ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
