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View Full Version : 2:£ pulldown undoes applied filters in the encode ?


Theagg
26th April 2002, 16:28
This is bugging me.

Having encoded a divx source ( which is 23.976fps ) and applied the telecide filter in order to remove the telecined artifacts apparent in the divx source, the resultant encoded mpv file prior to pulldown looks reasonably free of them.

Apply 2:3 pulldown to this file, and voila, the artifacts that were present in the initial source spring back to life in the m2v file !!?

No combination of selecting or deselecting different options in the CCE advanced settings tab has any effect on the final file after pulldown has been applied....artifacts that were there in the source, cleaned out in the intermidiate file, reappear in the final file following 2:3 pulldown ! Whats going on ?

The only option that seems to remove the artifacts from the final file is to set the "even" flag in the pulldown command line.

Unfortunately this has the result of making the final Mpeg2 video stream play back at an accelerated rate, with the result that when you try to mux this to the audio track, the two no longer sync and the audio falls further and further behind the video.

The same sequence of events occurs even if I don`t apply the telecide filter ie source (with artifacts ) ...> intermediate encode ( reasonably fre of artifacts).....> final pulled down file (artifacts reappear )

Help !!!

smoof
26th April 2002, 20:26
See if this works any better:

Pulldown source.mpv destination.mpv -prog_seq i -prog_frames p

Theagg
26th April 2002, 21:01
makes no difference, in fact I`ve probably tried out that sequence already. Still only selecting "-tff even" clears it up, with the afformentioned problem.

Its a pity the intermediate file isn`t suitable for making into SVCD, but being pre-pulldown, ( still 23.97fps) it wouldn`t mux/play back correctly on the standalone.

Frustrating, I cannot see a way past this !

smoof
26th April 2002, 22:53
What if you tried this to change to 29.97fps and fields to even?

pulldown src.mpv dst.mpv -framerate 29.97 -tff even


When I was having problems with DVD's not playing correctly on my Sony standalone I took a 30 second test clip and encoded it using different CCE settings (top field first, bottom field first) and then used a bunch of different parameter combinations with pulldown. I ended up with about 24 test clips that I burned to a DVD and checked on the standalone. You might want to try something similar with the video that's giving you trouble.