[MPlayer-users] time scale problem, bug ?
pupeno at pupeno.com
Fri Jul 11 17:04:34 CEST 2003
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Hello mplayer users/developers.
I'm having a weird problem with mplayer... I'll descrive it with an example.
I have a video that with mplayer -identify reports the following information
That is, it has a length of 53 seconds, but when I play it, the real length,
seems to be 43 seconds.
Look at the last line of it decoding
A: 43.0 V: 43.0 A-V: 0.007 ct: 0.050 1018/1018 5% 4% 0.8% 8 0 0%
So far, it seems just like an error while reporting the length, but the real
strange things comes wheen seeking...
Seeking in absolute time mode... it seems to seek as if the video as 53
seconds long... so, if I jump to second 42 I'm nto 1 second away from the
end, but 11 seconds away from the end, and the dynamic output shows this fact
telling that it is playing seconds 34 or 35.
So, there's an offset between the reported time with -identify and the real
time and there's the same offset with the seek time and the real time... now,
this offset seems to get bigger as times goes on... linealy, so, I would say
there's a converstion factor... if I jump to second 53, it goes to 43, if I
jump to 26.5 (53/2), it goes to 21.5 (43/2) and so on... That's why I say, it
seems like a scaling problem, there are two scales, the real on, reported in
the dynamic output (time and frames) and another one, used for seeking and
reporting on -identify. Now this doesn't happen with only one video... it
happens with all the videos I tested, BUT, all of the reported diferent
factors, maybe the factor depends on the length of the video, I'm not sure
about this, but the wrong scale was always bigger than the real one.
I hope this report was useful for you, but I have to solve the problem in my
application... to do that, all I need is to get the real number of frames the
video has... is that posible ?
Thank you very much.
Pupeno: pupeno at pupeno.com
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