[MPlayer-users] will mplayer do a 3:2 pulldown on 24 fps video when ofps=29.97?
mplayer at interlinx.bc.ca
mplayer at interlinx.bc.ca
Fri Feb 21 22:57:59 CET 2003
On Fri, Feb 21, 2003 at 11:15:21AM -0500, D Richard Felker III wrote:
>
> Yes, and because your -vo sucks. With a vo that syncs to vertical
> retrace,
Perhaps we are not talking about the same thing. But I suspect we
are. I am saying that dfbmga does (or rather can -- I dunno if it's
in the official mplayer version of dfbmga or not) sync to vertical
retrace. i.e. vo_dfbmga.c on my working mplayer here does a:
vo_flags |= 0x100;
in it's preinit(). And mplayer.c does this:
//============================== SLEEP: ===================================
time_frame/=playback_speed;
// flag 256 means: libvo driver does its timing (dvb card)
if(time_frame>0.001 && !(vo_flags&256)){
#ifdef HAVE_RTC
if(rtc_fd>=0){
...
} else
#endif
{
// -------- USLEEP + SOFTSLEEP -----------
...
}
}
If that's not what you mean by a vo driver syncing to vertical
retrace, what do you mean?
> you'll at least see the extra frame for one refresh period.
But if mplayer is only producing 4 frames where it should be producing
5 (3 reguarlar "progressive" frames plus two interlaced/telecined
frames), then only 4 will display, no?
> If you're using DXR3, I would imagine you'd get nice smooth perfect
> 29.97 fps output.
I am testing the 3:2 pulldown by using "-fps 1" on my workstation in
an Xvideo window and counting the number of good looking frames vs.
interlaced frames and it's 3 normal 2then 1 interlaced then 3 then
1...
> Actually I hate telecine, so the main
> use for me is to make telecined files for testing -vop detc. :)
:-)
> Yes, it would be nice if it worked during playback with all vo's, but
> for now that's a limitation of mplayer.
Right.
> No. If you increase the framerate of your video from 23.976 to 29.97
> fps while adding 20% more frames, the total length of the movie does
> not change at all, does it?? So why would audio be affected?
You are right of course. I had a brain fart and was thinking audio
smaples were related to frames (i.e. 1 audio sample for 1 frame), not
time slices. Of course 30 minutes of audio is 30 minutes of audio no
matter how many slices you put it into. I will have to go back and do
some testing again, where I was seeing serious a/v sync drift.
b.
--
Brian J. Murrell
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