[MEncoder-users] B-frames and GOP with MPEG-2 for DVD

[Nico Sabbi]

Nicolas Hesler wrote:

>Nicolas Hesler wrote:
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>> The curious thing about the skipping frames is 
>>that my input is exactly 24fps (not 23.976) and my output is 23.976.  If 
>>you take the difference (0.024 x the seconds where it was skipping 
>>frames, you end up with almost exact integers of 2,4,6, etc.) any ideas 
>>on that?
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>I've just completed another test on a longer video to confirm my 
>findings.  Ok, So If you take the exact frame location where the frame 
>was skipped and divide it by the incoming frame rate (exactly 24fps (not 
>23.976...)) and then multiply that by the difference in frame rate 
>between the input (24) and the output (24000/1001), you end up with 
>exact integers (2,3,4,5,6,7), although sometimes it does not report 
>skipping a frame at a given integer (see below...it doesn't report at 6, 
>8, 11, 13). Another number that is recurrent is the difference between 
>skipped frames which is usually 1001 frames.  This must all somehow make 
>sense.  But I don't know how.  Anyone?
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it's pretty basic arithmethics with - probably - some added rounding error.
Why don't you remove -ofps and use -mpegopts 
:tele_src=24:tele_dest=3000/1001 ?