Hi folks,
My production system consist of 16:9 analogic camera, that I connect to my
computer by a video recorder, resulting in an anamorphic PAL MPEG video as
have been explained at
http://www.doom9.org/aspectratios.htm
Source video:
- format: MPEG2
- data image size: 720x576
- DAR (Display aspect ratio): 16:9 = 1.78:1
- complete image size: 720x576 * 16:9 => 576x16/9 = 1024 -> 1024x576
When I opened the source video on Cinelerra, it's played in 720x576 both
Viewer window and Compositor window insted of 1024x576 as mplayer do.
Perhaps, because Cinelerra process the source video like data, so 720x576.
Finally, this week I resolve the problem and now the Compositor window
show 1024x576 complete image:
- first, resize vdeo track to complete image size 1024x576
- second, use Scale effect and setting x to 1.7778.
If you want another target video image size keeping 16:9 aspect ratio, for
instance width 720:
Target video:
- format/codec: MOV/mpeg4
- image size: w x h = 720 x h => h = 720*576/1024 = 405 -> 720x405
Now, you can set the cavas size 720x405 in the Set format window, that
set the project attributes; don't forget that source video track size can be
different from target video size. In this case, it's need to adjust sizes in
the Compositor window.
I hope it helps. Any corrections and better solutions are wellcome.
Greetings.
