[MPlayer-users] new version of detc filter! (inverse telecine)

[Vladimir Mosgalin]

On Sat, 15 Mar 2003, D Richard Felker III wrote:

DRFI>Postproc should probably be done afterwards for reliability and
DRFI>quality. Otherwise, detc might not detect interlacing as well and

Ok... But there was something about 'pp' should be the first filter in
chain...

DRFI>Hmm, your version must be entirely different from mine. Mine is
DRFI>29.97 fps all the way through, on DVD. I know there are several
DRFI>different DVD releases; I have the original with 4 DVDs and only
DRFI>Japanese audio.

I've got 7 svcds with japanese audio and english subtitles...
Well, maybe it was just encoded to svcd such way. I don't have source
dvds - unfortunately, anime dvds are unavailable in my country, except
5-10 most major titles, which is nothing.

DRFI>> But I never reencoded... And I tried it with some svcds, it
DRFI>> worked great.
DRFI>
DRFI>Yes, except it uses tons of CPU time and every 4th frame will be

Huh? It takes less then 1 percent of cpu time... Denoise3d is the most
cpu-eating filter, in my opinion - > 10% for 480x480 video.

DRFI>shown for 1/15 second (double time) instead of all frames being
DRFI>shown for 1/24 second. This looks really bad during pans.

Well, I see that something isn't too good, but at least it's much better
then original video or deinterlaced video.

OK, now I tried to reencode video, but something isn't working right. I
tried -vop detc, -vop detc=dr=1, with -ofps 23.97/23.976/23.98/24, but I
see duplicate frames messages and sometimes interlaced frames appear in
resulting file. There aren't too much of them, in average every 22-th
frame is "duplicate", sometimes there are 200-300 frames in a row
without duplication, sometimes two following frames are both
"duplicated". Here is an example (output from "mencoder -vcd 1 -o
naus.avi -ovc lavc -oac copy -vop detc=dr=1 -ofps 23.97"):

Pos:   1,7s     56f (147%)  53fps Trem:   0min   0mb  A-V:0,022 [872:128]
1 повторяющийся(хся) кадр(а/ов)!
Pos:   2,2s     72f (153%)  56fps Trem:   0min   0mb  A-V:0,028 [760:128]
1 повторяющийся(хся) кадр(а/ов)!
Pos:   2,8s     88f (158%)  58fps Trem:   0min   0mb  A-V:0,022 [715:128]

More of the pattern:
30f 56f 72f 88f 94f 111f 117f 138f 154f 159f 174f 184f 189f 199f 204f
219f 234f 249f 274f 279f 294f 309f 324f 334f 339f 349f 354f 369f 384f
404f 416f 417f 428f 434f 451f 452f 458f 459f 471f 482f 488f 494f 511f
518f 524f 544f 554f 574f 584f 589f 604f 614f 634f 649f 659f 664f 709f
769f 779f 784f 799f 934f 944f 959f 964f 974f 1193f 1208f 1223f 1230f
1238f 1253f 1260f 1268f 1283f 1298f 1313f 1320f 1321f 1322f 1323f 1333f
1340f 1348f 1355f 1363f 1378f 1393f 1408f 1423f 1438f 1453f 1468f 1483f
1498f 1513f 1543f 1558f 1573f 1580f 1588f 1603f 1743f 1798f 1813f 1820f
1828f 1835f

it seems to be quite irregular... And sometimes it shifts at one frame
(29 55 71 ...)

In resulting file in some frames I see patterns which are similar to
interlacing, but are in color. Is there way to force detc to detect this
svcd as telecined one?

-- 

Vladimir