On Sun, 30 Oct 2005, Aleksander V. Dyomin wrote:
> Sorry for my poor english.
No need to apologize, your English is fine.
> I have made mistake while writing script to encode my DV to MPEG2.
> Exporting stream with mplayer I used "-vo yuv4mpeg:interlaced" option.
That is why I use 'smilutils' rather than MPlayer. DV is always
bottom field first but that information apparently is not available
to the "-vo yuv4mpeg" module .
The smilutils have not had a release in several years so you will
want the 'CVS' version:
http://sourceforge.net/cvs/?group_id=14103
My CVS/Root file is:
:pserver:[EMAIL PROTECTED]:/cvsroot/kino
And CVS/Repository:
/cvsroot/kino/smilutils
> Later, on hw dvd player, I have seen "buggy" video, as described at
> mjpeg-howto(wrong field order). Problem understood, and now I using "-vo
The '-vo yuv4mpeg' probably defaulted to 'top field first' rather than
checking what the field order of the input data was.
> yuv4mpeg:interlaced_bf" (bottom first). All ok. But I have some "buggy"
> disks and have not dv-sources for it :( So I cant recode it from sources
You could re-encode from the mpeg-2 files. That will decrease the
quality slightly of course (but if carefully done the difference might
not be too noticeable).
> with right setting. Its possible to change field order in mpeg2
> _without_ recoding? I have tested "wrong" and "right" files and sizes is
It might be possible but I do not know of any tools that will
change the flags in the MPEG-2 stream.
> equal, and differences is similar on some bytes(some flags is different
> I think). But I haven't found any utilities to change such flags :(
One of the differences would be the 'top field first' flag. I do
not know of any utilities that will change the necessary flags.
Steven Schultz
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