FFmpeg: how to resize

[Joe Satriani]

Hi guys,
I have an .avi file and would like it to become an mpeg2video one so used ffmpeg....
everything is fine until launch dvdauthor which does not recognize the aspect ratio because my avi file is 704x304!
How can I resize it to 720x576 (pal, 16:9) with ffmpeg??? I did many times with Gordian Knot & co....but many years have passed by...
thanks in advance
joe

[echo]

Use the -s switch. Like
ffmpeg -s 720x576 ...

[Joe Satriani]

Use the -s switch. Like
ffmpeg -s 720x576 ...

that's what I did.....now my problem is that mplex gives me back this error **ERROR: [mplex] Too many frame drops -exiting and tcmplex does not belong to transcode package anymore....I really do not know what to do....

[echo]

I really don't know. I don't understand why it reports framedropping.
Maybe you could try adding -aspect 16:9
And have you tried mencoder for creating the .mpg?

[Joe Satriani]

I really don't know. I don't understand why it reports framedropping.
Maybe you could try adding -aspect 16:9
And have you tried mencoder for creating the .mpg?
even this error was fixed: I used tcmplex-panteltje rather than mpex or tcmplex!
Anyway I'm not so sure about what I did: if added -s 720x576 I'd see a distorted image but I don't...
Are you experienced about ffmpeg conversions?? can you tell me ?

[echo]

Probably an aspect ratio correction is applied and you don't see a distorted image. Check mplayer's output for a line like this:
VO: [xv] 720x576 => 1024x576 Planar YV12
It should be near the end.