[MEncoder-users] two pass encoding with pullup

[Winterbird]

D Richard Felker III wrote:

>On Mon, Apr 04, 2005 at 07:58:37PM +0200, Winterbird wrote:
>  
>
>>Hello.
>>I'm happy for the usefullness of two pass encoding. However, I'm having
>>difficulties understanding how to use it with IVTC filters, like pullup.
>>What should the first pass look like if I use pullap to ivtc the video?
>>should the pullup filter be active on both passes or just on the second?
>>    
>>
>
>Yes. Exact same filters must be used on both passes, _especially_ with
>any filter that alters the number of frames!
>
>  
>
I thought as much...

>>The reason I ask is because when I use the pullup filter on both passes
>>I can sometimes see some ugly bit usage on moving objects and so on. I
>>havn't tried yet with pullup of on the first pass, but I'm still not
>>sure if that is the right thing to do...
>>    
>>
>
>Huh? If you're having trouble with it you should preview with mplayer
>first, and possibly tweak the options to pullup or use one of the
>other ivtc filters. Also make sure you're using it correctly to begin
>with. In any case, this all has nothing to do with 2pass encoding.
>
>Rich
>  
>
the video looks good when I watch it in mplayer, but I'm beginning to
think that pullup doesn't always drop the same frames, and that's why
the video becomes strange... I guess I'll just have to experiment a
little to see if I can get it working with pullup or any other ivtc...
Thanks for the help.