[MEncoder-users] capture: synchronization problems

[Nico Sabbi]

amber wrote:

>>Plus, if you are going to re-encode to MPEG2/4 later, it's better to stick with a
>>    
>>
>codec in the same family.
>
>i'm not very much familiar with those codecs and capturing - still a newbie. could
>somebody please summarize it?
>
>i understand mjpeg causes some artifacts. mpeg2 and 4 do not. and they are almost as
>fast
>or even faster so they sould be used instead mjpeg, provided the keint is set to 1.
>there
>will be no problems with further editing. is that right?
>  
>

I'm just speculating (didn't try it) but I guess  that if you use a 
certain bitrate/vqscale (eventually implicit)
the rate control code wil (or at least should) kick in even when using 
keyint=1, so
you had better specify explicitly a high bitrate, e.g. 
vbitrate=9999:keyint=1

>now, mpeg4 is in fact divx/xvid - is that right? and mpeg2 is DVD?
>  
>

xvid, divx and fmp4 are implementations of mpeg4, dvd video is a 
restricted implementation of mpeg2

>so if the target format of the recorded material is going to be dvd, i should use
>mpeg2 and if i want to watch it on a PC, i should use mpeg4 (especially that more and
>more dvd players can play divx). can somebody verify it?
>
>  
>

you can also encode to dvd for watching on TV, lavc produces very good 
quality dvd, but it doesn't
compress as good as mpeg4