On Sun, 2003-11-30 at 01:19, Steven M. Schultz wrote:
>
> > From: Florin Andrei <[EMAIL PROTECTED]>
> > mplex -O is still broken.
>
> Seems to work for me.
> mplex -f 8 -O -500 -o foo.mpg foo.m2v foo.mp2
> And using mplayer to view the movie showed the expected
> disconcerting A/V sync slip - see the lips move and then the
> sound arrives.
I tried with xine and mplayer. Neither shows any perceptible sync
difference, even for a large -O.
> And for the transcode folks:
> tcprobe -i foo.mpg
> frame rate: -f 23.976 [25.000] frc=1 (*)
> PTS=0.1780, frame_time=41 ms, bitrate=7500 kbps
> audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x50 [0x2000] (*)
> PTS=0.6780, bitrate=192 kbps
> -D -11 --av_fine_ms -41 (frames & ms) [0] [0]
>
> 0.178 - 0.678 sure looks like -0.500 to me
That's precisely what doesn't work for me.
Here's the -O -500 file:
frame rate: -f 23.976 [25.000] frc=1 (*)
PTS=0.1780, frame_time=41 ms, bitrate=9800 kbps
audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x50 [0x2000]
(*)
PTS=0.2008, bitrate=224 kbps
-D 0 --av_fine_ms -22 (frames & ms) [0] [0]
And here's the -O 500 one:
frame rate: -f 23.976 [25.000] frc=1 (*)
PTS=0.2008, frame_time=41 ms, bitrate=9800 kbps
audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x50 [0x2000]
(*)
PTS=0.1780, bitrate=224 kbps
-D 0 --av_fine_ms 22 (frames & ms) [0] [0]
+/- 22 ms difference instead of 500 :-(
> > Yet, the time-shifted VOBs do not show the expected time-shifting,
> > neither when playing them with a media player (i made the movies so that
>
> By media player do you mean software or hardware (settop box)?
I didn't try on the hardware DVD player. But there's no reason to,
because three different applications show the same results.
> Software says that -O is working fine. I could author that out
> to a DVD+RW disc and try it there - but if tcprobe says the offset
> is -0.500 and MPlayer shows the effect I'm fairly certain the Philips
> DVD player will show it also.
Exactly the opposite here.
> > In fact, as far as i can remember, mplex -O never worked for me. I
> > always thought it was an option that doesn't work :-) only recently i've
>
> It's always worked for me - there were times I needed to adjust
> the delay with "-O -100" for some broken movies.
That's precisely what i'd like to use it for.
Andrew Stevens mentioned something about compiler/libraries differences,
which rings true to me. I'm pretty sure i'm not repeating the same
mistake over and over, and mplex -O fails for me on several different
systems, all of them running several different Red Hat "flavors".
That's why i suspect it's probably not just me who has the problem. I
believe i actually reported it like a year ago on mjpegtools-users
(given or taken), but somehow the issue faded away quietly.
Someone who knows how VOB/MPEG2 are supposed to look like might be able
to spot the issue if he takes a look at the files i uploaded on my
website (link in my other message), but to me it's all a black box.
If one of the main developers wants to take a look at the problem, i can
provide a temporary SSH shell on one of my systems, i just need the
public SSH key (mail me privately).
--
Florin Andrei
http://florin.myip.org/
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