[FFmpeg-user] Reversing PAL->NTSC telecining.
nickrobbins at yahoo.com
Tue Jan 7 01:51:58 CET 2014
> On Monday, January 6, 2014 7:41 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> > Nicholas Robbins <nickrobbins <at> yahoo.com> writes:
>> >> >> >> If you recall, something about how mplayer
> dumps its
>> >> >> >> vobs labels them as ~60fps, when they are
> really ~30.
>> > I would like to look at this issue (if it is reproducible.
>> > (The fps filter should not be necessary.)
>> So, do you want the output of perhaps
>> mplayer -dvd-device /dev/sr0 dvd://1 -dumpfile out.vob
>> -dumpstream -endpos 2M
uploaded robbins.vob and robbins-vob.mkv. robbins.vob is the result of
mplayer -dvd-device /dev/sr0 dvd://2 -dumpfile robbins.vob -dumpstream -endpos 2MB
and robbins-vob.mkv is the result of mkvmerge -o robbins-vob.mkv robbins.vob
it looks like it may be a problem with mkvmerge or how the ffmpeg tools look at mkv's.
>> >> a) -vf fps=30000/1001,fieldmatch,decimate=6
>> >> won't a) leave interlaced frames?
>> > Only for very badly cut material.
>> the ffmpeg docs suggest including yadif.
> It also suggests that fieldmatch is better than
> pullup but I still haven't seen a sample that
> shows this (it is much slower though).
> I think this does not always work correctly so you should
> probably only use it if necessary for your sample.
> Carl Eugen
What would "not work correctly" look like?
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