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-   -   DVD2SVCD: Strange stroboscope effect + script/ini question (http://www.digitalfaq.com/archives/encode/5232-dvd2svcd-strange-stroboscope.html)

Paulus 08-27-2003 06:07 AM

DVD2SVCD: Strange stroboscope effect + script/ini question
 
Quote:

By the way, is this still the best ? -> Dialhot I saw your suggestion to Payasa in the Optimal Script forum to use the script below which has a couple of new scriptlines (Adaptive Filter) like "ConvertToYV12()", 2x "Limiter()", ^scdtrigger=30. Further there's a line removed ("SwitchTreshold") between MergeLuma..... and ScriptClip. Am I using an "old" script ?
In fact the very last optimal script is a merge between yours and mine :
1/ I didn't saw that I used an old version of my ini file where Limiter lines were still there. They are usesless !
2/ The "ConvertToYV12" is useless also for DVD sources so I removed it.
3/ Nevertheless the part with Switchthrehold and its use into the scriptclip is necessary : it helps DVD2SVCD into finding the correct CQ. Without this, the results are so random that D2S can't find the CQ in the 20 tries it does at the maximum (it then encode the film with the last CQ found even if it is not the correct one :-().

This last modification make the MA script a little less efficient, but I didn't find an other way (except making the CQ determination with CQMatic and do not let D2S try to calculate it !)

Note : I modified the optimal scripts in the sticky post.

Edited and partially erased by mistake. I'm sorry - dialhot.

Paulus 08-27-2003 06:14 AM

Pfffffffff.............

Sorry about the scriptquestion. Didn't see the sticky............Should check in here more often. :-)

Dialhot 08-27-2003 07:26 AM

Quote:

Originally Posted by Paulus
Pfffffffff.............

Sorry about the scriptquestion. Didn't see the sticky............Should check in here more often. :-)

I modifed it just before answer to you ! :-)

Dialhot 08-27-2003 07:35 AM

@Paulus :

Sorry my pal ! I edited your post insteed of do a reply on it :-( :imstupid:.

And so your initial question about stroboscope was lost. So sorry. Can you post it again ?

Paulus 08-27-2003 12:55 PM

Aahh, Phil...and I described it so well :D . OK, I try again.....

On my present "project", a compilation DVD with three "Wallace and Gromit" short movies I have a problem with the last short movie (the first two I have ripped in excellent quality and perfect filesize).

In the endresult, during movement of the characters (even slight movement) you can notice a "flickering" of the image (I call it a "stroboscope" effect because the flickering is very fast, and very anoying). It is as if the picture isn't "build up" fast enough. I've originally tried the normal (internal) routines of DVD2SVCD for the ripping, but also using DVDdecrypter the problem is the same.

I have a "wild" theory: one of the first scenes of the movie is an "earthquake" scene where everything in the picture is shaking "violently" -> could TMPEG get "confused" by these scenes and encode the rest of the movie with this stroboscope distortion :? ??

Any suggestions on how to solve this are very welcome because my son is asking every day "please dad I wanna see Wallace & Gromit" :)

Dialhot 08-27-2003 01:53 PM

Quote:

Originally Posted by Paulus
Aahh, Phil...and I described it so well :D . OK, I try again.....

Sorry, that is the moderator board that is too complicate with the button "edit" too close from the button "quote" :-)

Quote:

In the endresult, during movement of the characters (even slight movement) you can notice a "flickering" of the image (I call it a "stroboscope" effect because the flickering is very fast, and very anoying). It is as if the picture isn't "build up" fast enough. I've originally tried the normal (internal) routines of DVD2SVCD for the ripping, but also using DVDdecrypter the problem is the same.
Is the third ep the same frequency than the two others ? I had a such problem one with a 24 fps movie that I solved by setting "3:2 pulldown during playback" on in tmpgenc.

Quote:

-> could TMPEG get "confused" by these scenes and encode the rest of the movie with this stroboscope distortion :? ??
Nope. For the encoder point a view, the movie start from scratch at every GOP start. So every 24 (or 25) frames :-)

Paulus 08-27-2003 05:33 PM

Hi Phil,

I will check frequency (DVD2AVI ?) but assume it is the same as the first two clips/movies. Whey would they use different frequencys authoring/mastering a DVD ?

How do you check the option "3:2 pulldown during playback" using D2S ?.

Regarding the script/ini (by the way, your sticky isn't locked anymore, do you want replies in that thread ?..).

Question regarding the script.........you mention that the "SwitchTreshold" lines are still important but I don't see them in the present version ??
Maybe I didn't understand correctly....

What extra avs plugins are necessary in comparisson to your last (my present) ini ?

Could you explain a little the exact working of the script or do I check the "official" optimal script section..?

Dialhot 08-28-2003 06:05 AM

Quote:

Originally Posted by Paulus
I will check frequency (DVD2AVI ?) but assume it is the same as the first two clips/movies. Whey would they use different frequencys authoring/mastering a DVD ?

You know, all this fps problems you have in NTSC, we don't take care in PAL :). So I don't know, but why not ? ;-)

Quote:

How do you check the option "3:2 pulldown during playback" using D2S ?.
I thing (has to be tested) that is automatically set when encoding a 23.97fps movie in MPEG2. But it does'nt work if you use MPEG1.

Quote:

Regarding the script/ini (by the way, your sticky isn't locked anymore, do you want replies in that thread ?..).
No, I prefer to keep the thread clean (and going to lock it again)

Quote:

Question regarding the script.........you mention that the "SwitchTreshold" lines are still important but I don't see them in the present version ??
I REALLY need vacations ! I forgot to add it. That's done :-)

Quote:

What extra avs plugins are necessary in comparisson to your last (my present) ini ?
Don't know what you have.

Quote:

Could you explain a little the exact working of the script or do I check the "official" optimal script section..?
If you do not know anything about MA script, yeah it's better to check optimal script section and ask your questions there.

Paulus 08-31-2003 05:06 AM

Phil,

DVD2AVI says the source is interlaced, so I tried Smartde-interlace in D2S. -> Now the "stroboscope" effect is gone but I have an ugly picture in the endresult. The TV screen is devided in two squares. One is in normal colour and one is "purpulish".

I've read in some thread that D2S de-interlace options are not possible with the adaptive script. Could you recommend an avi plugin which I can use for testing (and where to put it in the script/ini).

Dialhot 08-31-2003 05:55 AM

Your problem of screen splitted in two part is a matter of color space. By using deinterlacing included in D2S, you (in fact, D2S) converted your movie in YUY2. The MA script needs to work in YV12.

You can use "Fieldeinterlace" that works in YV12 but you have to add it manually to avoid th automatic convertion from YV12 to YUY2 done by D2S.

Just go to misc tab of D2S, ask for editing the avs script during encoding phase an add "fielddeinterlace()" just after the source is loaded.

Paulus 08-31-2003 05:07 PM

It almost worked Phil......

The stroboscope effect is gone but now I can't get the aspect ratio correct at 4:3 with the new ini settings (see below). Any ideas ?



GENERAL INFO
- Source: DVD (PAL)
- Movie Offset: 2 sec
- CD Overlap seconds: No
- Startup delays: Video: 344 ms Audio 1: 344 msAudio 2: 344 ms
- Video format: PAL
- Length: 00:30:00
- CD Images: 1

IMDB INFO:
Movie title:
User rating:
Directed by:
Writing credits:
Genre:
Tagline:
Plot outline:

VIDEO INFO:
- Encoder: TMPGEnc 2.513.53.162
- Rate Control Mode: Constant quality (CQ)
- Max. bitrate: 2376
- CQ Value 65.00
- Min. bitrate: 400
- Motion search prec.: Motion estimate search (fast)
- Field order: Yes
- DC component prec.: 8 bits
- Output YUV as YCbCr: No
- Floating point DCT: Yes
- No motion search: False
- Soften block noise: No
- iDCT Algorithm: 32-bit SSE MMX
- Deinterlace: SeparateFields/SelectEvery
- Pulldown: No
- Width: 480
- Height: 576
- Matrix:
Intra:
8 16 19 22 26 27 29 34
16 19 22 26 27 29 34 37
19 22 26 27 29 34 37 38
22 26 27 31 36 37 38 40
26 27 29 36 39 38 40 48
27 29 34 37 38 40 48 58
29 34 37 38 40 48 58 69
34 37 38 40 48 58 69 79
Non-Intra:
16 18 20 22 24 26 28 30
18 20 22 24 26 28 30 32
20 22 24 26 28 30 32 34
22 24 26 30 32 32 34 36
24 26 28 32 34 34 36 38
26 28 30 32 34 36 38 40
28 30 32 34 36 38 42 42
30 32 34 36 38 40 42 44

AVISYNTH SCRIPT:
LoadPlugin("C:\PROGRA~1\DVD2SVCD\AVISYN~1.5PL\Mpeg 2dec\MPEG2D~1.DLL")
mpeg2source("D:\WORKDI~1\DVD2AV~1.D2V")
SeparateFields()
SelectEvery(2,0)
nf=0
GripCrop(480, 576+0+0, overscan=1, source_anamorphic=false, dest_anamorphic=false)
GripSize(resizer="BiCubicResize")
Undot()
Asharp(1, 4)
STMedianFilter(8, 32, 0, 0 )
MergeChroma(blur(1.58))
MergeLuma(blur(0.1))
SwitchThreshold = (Width<=352) ? 4 : (Width<=480) ? 3 : 2
ScriptClip("nf = round(YDifferenceToNext())"+chr(13)+ "((nf >= SwitchThreshold) && (nf < 30)) ? unfilter(-(fmin(nf*2,100)),-(fmin(nf*2,100))) : TemporalCleaner(6+nf,11+nf) ")
GripBorders()
function fmin(int f1, int f2) { return (f1<f2) ? f1 : f2 }


AUDIO INFO:
- Audiostreams: 1
- Audio 1 Language: Nederlands
- Audio 1 Bitrate: 160
- Audio 1 Sample freq: 44100
- Audio 1 Mode: Stereo
- Audio 1 Besweet: "C:\Program Files\DVD2SVCD\BeSweet\BeSweet.exe" -core( -input "D:\WorkDirectoryMovie\Extracted_audio_1.ac3" -output "D:\WORKDI~1\Encoded_audio_1.mp2" -logfile "D:\WORKDI~1\Encoded_audio_1.log" ) -azid( -L -3db -c normal -s surround -g max ) -shibatch( --rate 44100 ) -2lame( -e -b 160 -m s )

SUBTITLE INFO:
- Subtitlestreams: 0
- Type:
- Sub. 1 Language:
- Sub. 2 Language:
- Sub. 3 Language:
- Sub. 4 Language:

AUTHORING INFO:
- CD Image program:
--------------

Edit: I'm running a new encode (the twenthieth or so...:-() with standard D2S "Telecide (PAL)" -> preview looks good (no interlace artifacts and correct aspect ratio). Let you know how it turns out....

Dialhot 08-31-2003 05:33 PM

Change the "source_anamorphic=false" to "source_anamorphic=true"

(go to frameseerver tab, click on the "..." in front of gripcrop line and modify the value of the parameter "source_ana".

Paulus 09-01-2003 03:50 AM

The source was 4:3 so I made those settings.......


Anyway, "Telecide (PAL)" did the job without screwing up the aspect ratio !

Finally I have a perfect "Wallace & Gromit" SKVCD :D

Thanks......

Dialhot 09-01-2003 04:53 AM

Nice :-D


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