Re: avoiding jagged lines on mp2

Le 28 avr. 06 à 11:28, ffmpeg-user-request@xxxxxxxxxxxx a écrit :

> ------------------------------
>
> Message: 6
> Date: Fri, 28 Apr 2006 00:27:23 +0200 (CEST)
> From: Leonardo Boselli <leo@xxxxxxxxxxxxxx>
> Subject: [Ffmpeg-user] avoiding jagged lines on mp2
> To: ffmpeg-user@xxxxxxxxxxxx
> Message-ID:
>         <Pine.LNX.4.21.0604280018530.4729-100000@xxxxxxxxxxxxxxxxxxxxxx>
> Content-Type: TEXT/PLAIN; charset=US-ASCII
>
> I tried to get a mpeg2 file from a dv file from camera using:
>
> ffmpeg -f dv -s 720x576 -i dvfile.avi -b 2500 -ab 128 -vcodec  
> mpeg2video \
> outfile.mpg
>
> result is good if I have images without too much movements, but is the
> people move too much i get a lod of annoying jagged lines due to
> interlacing. Other times i resorted in the dirt way, encoding as a  
> 384x288
> images, so using only even fields , but losing a lot of details.
> since post of the movie are maps and other drawing of course i want to
> keep the most detail it is possible, and the problem can be seen  
> only when
> some one is gesturing.

> There is a way to avoid it ?
yes, use a progressive camera to shoot, like some very expensive HD  
camera

seriously, you have an interlaced input and you complain about an  
interlaced output
then you want to suppress half of the informations of your input but  
without loosing quality...
:-P

if you really want to suppress half of the informations (suppress one  
field of two) of your input but keep your size, use the parameter "- 
deinterlace"

(or perhaps I didn't understand the aim of your question...)

Hervé