Forcing other framerates
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On 4/26/2010 10:59 AM, meino.cramer at gmx.de wrote: > "Ing. Daniel Rozsny?"<daniel at rozsnyo.com> [10-04-26 17:21]: > >> meino.cramer at gmx.de wrote: >> >>> RC<cooleyr at gmail.com> [10-04-25 20:00]: >>> >>>> On Sat, 24 Apr 2010 16:32:40 +0200 >>>> meino.cramer at gmx.de wrote: >>>> >>>> >>>>> I bought a new LCD monitor with 60Hz framerate. >>>>> When playing videos sometimes I git a distortet >>>>> screen (not only with mplayer!!!). I think, it >>>>> is because the video plays at 50Hz framerate >>>>> which then interferes with the 60Hz refresh rate >>>>> of the monitor. >>>>> >>>> LCDs effectively do not have a refresh rate (or a "framerate"). >>>> >> LCD has a refresh rate! It refreshes the picture from top to bottom, >> just the "memory effect" of the screen is much bigger than on CRT. The >> LCD is effectively a visible dynamic memory (DRAM). >> > That means...? > Displaying Image contents with a rate of 25Hz to a technology > drawing every 1/60 second a picture...gives...? > > >> >>>> You've not described what this "distortet screen" problem is, so >>>> nobody >>>> can possibly help. >>>> >>>> >>>> -- >>>> Ha. I'm the idiot. >>>> _______________________________________________ >>>> MPlayer-users mailing list >>>> MPlayer-users at mplayerhq.hu >>>> https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users >>>> >>>> >>> If LCDs have no framerate or refresh rate, they will not draw >>> frames from top to bottom? How then? >>> A try for a better explanation: >>> Certain videos (for example the Neo<->Smith fight sceen in Matrix >>> Revoluitions) with fast changing lightning conditions expose some >>> screen distortions. >>> They are of two kind: >>> The upper half of the screen is still in "bright condition" >>> when the lower half is in "dark condition" -- what comes first and >>> where this "break" is, depends. Also varying is the position >>> of this "break" on the screen. >>> >> That is a missing vertical synchronization - what -vo are you using? On >> what video card and which drivers? Usually on dualhead the vsync is >> hard to get.. >> > Oh, oh...some mails ago I got a hint to disable all VSYNCs in the > nvidia settings... > > So...using -vo xv gives me the fastest (read: normal speed) video > with audio and video in sync. > Other drivers result in the message that my two core 3800+ AMD > CPU is to slow....(?) > My gra?hics card is ai > nVidia Corporation G73 [GeForce 7600 GT] (rev a2) which run with > the current nvidia drivers on a Linux box. > I myself and my computer each uses only one head ;) > Most of the time I use my own... ;) ;) > I disabled AutoTwinDevice in the Xorg.conf as I did with > TwindDevice (dont remember the correct names of that parameters, but > was something like that.). > > Since 60Hz is common for LCD I am asking myself, whether I am the > only one having problems with playing 25Hz/region 2 contents...?! > > Since it also happens for example with the fight scene Neo<->Agent > Smith in Matrix Revolutions (DVD, region 2) I think, it is not > a bug in the video itsself.... > > I am a little (read: very) frustrated, since this monitor is new > and I like its colors and features, but... > > So any help to circumvent this problem is *very* appreciated! :O) > > Have a flicker-free evening! :O)) > Best regards, > mcc > > ------- > Somewhere along this thread someone stated that the LCD is refreshed bottom to top. This is simply not true (suggest http://en.wikipedia.org/wiki/Refresh_rate). The actual 'flicker' is around 200Hz which I doubt comes into play in this case. Let me reiterate that I do what you are doing often and do not observe this symptom. Maybe it is some sort of interaction between graphics card and monitor?