[MPlayer-users] -ss option time descrepancy

[Michel Bardiaux]

D Richard Felker III wrote:

> On Tue, Sep 14, 2004 at 10:47:58AM +0200, Michel Bardiaux wrote:
> 
>>D Richard Felker III wrote:
>>
>>
>>>On Mon, Sep 13, 2004 at 01:39:58PM +0200, Michel Bardiaux wrote:
>>>
>>>
>>>>D Richard Felker III wrote:
>>>>
>>>>[snip]
>>>>
>>>>
>>>>
>>>>>this will not help. -ss 00:10:00 is exactly the same as -ss 600. the
>>>>>problem is that mplayer's seeking sucks, but you _cannot_ do correct
>>>>>seeking in an mpeg file without reading the _entire_ thing from the
>>>>>start up to the point you want to seek to...
>>>>
>>>>If one assumes an MPEG-PS format with correct timestamps, correct 
>>>>seeking to a particulat frame using repeated bisection then a little bit 
>>>>of MxV parsing should work, no? Of course the problem is then to 
>>>>*decode* non-key frames, especially when faced with variable GOP size or 
>>>>open GOPs...
>>>>
>>>>So ITYM 'seeking in a pathological MPEG'?
>>>
>>>
>>>if you call 75% of all dvd's "pathological", then yes...
>>
>>I had no idea the situation was so bad. 75% of all DVDs are not 
>>conforming to standards!?
> 
> 
> no, it's totally conformant. that's the problem...
> 
> rich
> 
Then I'm confused again, but that may be because I'm much more familiar 
with MPEG1 than with any other codec or format. May I split the question 
in 2:

(1) MPEG1: seeking should work if the MPEG is 100% shipshape.

(2) MPEG2: you say pathological but nevertheless conformant, could you 
specify?

HaND,
-- 
Michel Bardiaux
Peaktime Belgium S.A.  Bd. du Souverain, 191  B-1160 Bruxelles
Tel : +32 2 790.29.41