Aleksander V. Dyomin wrote:
Hi!
Sorry for my poor english.
I have made misstake while writing script to encode my DV to MPEG2.
Exporting stream with mplayer I used "-vo yuv4mpeg:interlaced" option.
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
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
with right setting. Its possible to change field order in mpeg2
_without_ recoding? I have tested "wrong" and "right" files and sizes is
equal, and differences is similar on some bytes(some flags is different
I think). But I dont found any utilities to change such flags :(
Help me plz.
There is a program called "pulldown" which allows the modification of various
mpeg flags. It's a hacked up version of bbvinfo. The source can be found
here:
http://www.inwards.com/inwards/?id=36
I hope this helps.
Mark
[taken from the command help]
PULLDOWN - v0.99d, by Hard Code.
[Based on sources by Brent Beyeler ([EMAIL PROTECTED])]
PULLDOWN is a tool for modifying the encoding flags in an MPEG-2 video
stream. It is most useful for turning a 23.976fps progressive stream into
an SVCD or DVD-compliant 29.97fps NTSC interlaced stream via 2:3 pulldown.
Using pulldown with only the source file name and no additional arguments
creates a new file called PULLDOWN.M2V in your current directory.
usage: pulldown <source> <target> [options]
options:
-nopulldown : pulldown will not insert the necessary flags for 2:3 pulldown
-framerate [23.976, 25, 29.97] (defaults to 29.97) : changes framerate
-norff : strips out all RFF flags
-tff [odd, even] : changes the field order
-notimecodes : does not recalculate timecodes for the new framerate
-prog_seq [p, i] : marks the entire MPEG stream as progressive or interlaced
-prog_frames [p, i] : marks each frame as progressive or interalced
-drop_frame [true, false] : Set drop_frame_flag for NTSC streams
-aspect_ratio [1:1, 4:3, 16:9, 2.21:1] : Change aspect ratio
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