[MPlayer-users] how to "step backforward" ?

[Alexander Roalter]

belcampo wrote:
> Phil Rhodes wrote:
>>> stepping forward is rather simple, it is 'normal'play at non-standard 
>>> speed.
>>> Going back is difficult in the sense you have to calculate several
>>> frames plus/minus the differences to 'know' how that former frame has
>>> looked.
>> Precisely.
>>
>> However, "several frames" can actually be many tens or of frames, maybe 
>> a hundred frames in some edge circumstances, and with intensive codecs 
>> that's a very big job.
> Do you know any, where I-Frames/Key-frames are more then 12 (PAL) or 15 
> (NTSC) between. Where are larger GOP-sizes used ??
> 
Mostly in Divx & other newer formats, where Key frame intervals are
oftern > 100 .


-- 
cheers,
Alex