[MPlayer-users] help wanted: using mencoder to make NTSC DVD from transport stream
nsabbi at tiscali.it
Sun Mar 6 00:23:21 CET 2005
Norman Ramsey wrote:
>I have an MPEG-2 transport stream I got through a US HDTV broadcast.
>The content is encoded at 720p (that is, 1280x720) with a 16:9 aspect
>ratio. I want to use this content to burn a DVD for playback
>on standard NTSC (US) DVD players. Since the DVD will be played
>back on an ordinary television, I want also to account for overscane
>The step I'm having trouble with is using mencoder to create MPG files
>that I can then pass to dvdauthor. I am going *crazy* trying to figure
>out the right way to scale, get aspect ratio, etc etc.
first use a fresh cvs checkout of mplayer, becauise there's a new
dvd-compatible mpeg muxer
>Has anybody out there used mencoder to create DVDs from non-DVD video
>If so, can you help or suggest options? At present, I'm
>using the following options, but I'm sure they're wrong :-(
> mencoder $i -vf scale=640:360,expand=-32:-64:16:32 -o $j-dvd.mpg -oac lavc \
> -vc ffmpeg12,mpeg12, \
> -of mpeg \
> -ofps 30 \
> -ovc lavc -lavcopts vcodec=mpeg2video:acodec=mp3:vbitrate=4000
mencoder $i -vf scale=720:-2,expand=720:480 -o dvd.mpg \
-vc ffmpeg12,mpeg12, \
-of mpeg -mpegopts format=dvd \
-ovc lavc -lavcopts vcodec=mpeg2video:vbitrate=4000:keyint=18:mbd=2:aspect=16/9 -oac copy
NTSC dvds want a 29.97 fps, so if your source is 29.97 don't convert it.
-oac copy is better
If there are many and frequent frameskips add -mc 0 -noskip.
>Is this the right scaling? I know a standard NTSC DVD is 720x480, but
>this isn't 16:9. I want to preserve the original aspect ratio.
>And what about the expand option for overscan?
>Any help appreciated.
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