2 questions for the dv veterans

[d-clone]

Ok, im encoding y movie for the third time now, Ill bitch about how sucky it came out when its done. Its in its first pass right now (divx 5) and the projected file size is 300 megs aprox, is this ok?

I only have 2 questions for the experienced.

- Whats (generally) the maximum length of a movie I should fit in 1 cd to get dvd quality? In my opinion would be a one and a half hour movie, but I dunno thats why im asking.

- Can I use Variable Bitrate MP3 for the audio?

[UncasMS]

of course it all lies in the eye of the beholder *g*

moreover, it'll make a diference if it is a widescreen movie with an aspect ratio of 2.35:1 or full screen 4:3.

then the resolution you encode to is another factor
704 wont be my choice if i wanted to put a long movie on one cd.

640 or less will make a difference.

then your resizer is important, too!
sharp wont let you compress the material as much as bilinear for example would!

though i never use anything else then sharp bicubic

[hacker_on_fire]

Re: length for 1 CD and VBR MP3s

Originally posted by d-clone
- Can I use Variable Bitrate MP3 for the audio? [/B]

This is possible in Besweet, Wavelab etc...

[d-clone]

@uncasms: Ok i read your guide and you repeat here that you allways use sharp bicubic. Why ALLWAYS? I mean there must be some cases where bilinear is better.

[UncasMS]

where bilinear is better

not for me


bilinear is LESS sharp

i dont do 1 cd conversions, thus a bilinear resizer (that will actually result in smaller filesize/better compressibility due to the fact that a sharp line/contrast/precise detail within th codec takes up more bitrate) is no gain but only a loss in terms of blurry videos.

since a 1cd rip wont be that good anyway, it doesnt really matter - to me, however, it does.
i want a near perfect result with no macroblocks an best possible sharpness.

thus, bilinear or simple resizing are no options for me.

[d-clone]

ok, so billinear for 1 cd and sharp bicubic for 2 or 3, right?
And i chose bilinear last time, is that why i got a filesize of 610 and not 705?
If this is the case then what good is the bitrate calc good for if the resizing method will change your filesize anyway? I mean Im aiming for a 705 meg. So If i choose bilinear ill get 610 and if i choose sharp bicubic ill get a filesize bigger than 705?
Ad about 1 cd ripps being not good enough quality, ive downloaded a few movies (most 90-98) and they were almost all 640 x respective AR. They all had DVD quality. So it pisses me off when i cant get it to be that size\quality

And thats not all, its on its second pass for the main movie file, projected file size is 250 megs. There is something wrong here.

[d-clone]

what the **** ios wrong?!?!?!

Ok, im getting sick of this!
My Audio file is 66 megs, ok that sounds right

My encoded credits were 33 megs: WTF? I thought it was supposed to be like 7 megs or something.

12:10:44 p.m.: Started DivX5-Single, Quality 20%: D:\Temp\road trip\road trip_Credits.avs
12:22:57 p.m.: Finished DivX5-Single, Quality 20%. Duration: 12 minutes, 12 seconds.
12:22:57 p.m.: Assumed: Main Movie has 130578 Frames.
12:22:57 p.m.: Assumed: Credits Part has 4832 Frames.
12:22:57 p.m.: Credits Size = 33510Kb
12:22:57 p.m.: New Bitrate for Movie = 914 k(=1000)Bits/s

I followed Doom9´s guide step by step. Whats hapening?

[khp]

Endcredits encoding, can sometimes behave very strangely, try setting the endcredits quantizer to 31.

[d-clone]

thats not all, virtualdub projects my main movie file size to be 250 megs, i¡tll be done in about 2 hours. Its in its second pàss, in the first pass it projected the same size too.

[khp]

OK something is wrong, virtualdub should not predict a filesize like that in the first pass.

Check that divx5.02 is properly installed on your system, by opening the avs file in virtualdub and select video compression, check that you are able to select divx5.02.

And make sure you are using GKnot version 0.26.

Something like this, is usually be caused by using GKnot 0.23 or lower with divx5 or using divx4 with GKnot version 0.25 or higher.

[d-clone]

Something like this, is usually be caused by using GKnot 0.23 or lower with divx5 or using divx4 with GKnot version 0.25 or higher.

AHA!
I would have noticed this like 2 weeks from now if it wasnt for you!
It seems that when I installed the gkot update, it installed the divx4 codec. I didnt think it would affect anything. But it seems that it blocked the divx 5 pro codec! All vdub shows is Divx Mpeg-4 Fast motion, Divx Mpeg-4 Low motion and the Divx 4.11 codec, doesnt even show the divx 3.11 codec!
This must be fing things up, ill uninstall all my codecs and gknot with all the apps, reinstall gknot with 3.11, update to .26 and then install 5.02 pro. This should clear everything up!
WOW, thanks allot! Youre really helpfull!

BTW my movie seems to be interlaced. What are the rules for deinterlacing? Like for NTSC, PAL, and framerate combinations?

[Erci]

Divx low motion and high motion are divx 3.11

About deinterlacing. If you have a PAl source just check deintarlacing in GK. I've heard that it's something wrong with one of them but I can't remember which. Someone probably do. In case of NTSC I would perform Inverse Telicine (IVTC). I belive you should be able to do that in GK but I don't know how.
But if you're NTSC is pure FILM material you should choose forced film in DVD2AVI

//Erci

[d-clone]

Originally posted by Erci

But if you're NTSC is pure FILM material you should choose forced film in DVD2AVI
//Erci

Hmm, I mine said just "NTSC" and following Doom9´s guide, I checked Force film. Well he doesnt really explain it very clearly heres the quote (29.9fps):

"If it's FILM at a percentage higher or equal to 95% you can activate Forced FILM as shown below. IF it only shows FILM the same applies. Otherwise you will have to perform IVTC, the same also applies if the Video Type is NTSC"

My conclusion from that was:

FILM > 95% = Nothing
FILM < 95% = Forced Film
just "FILM" = Forced Film

NTSC > 95% = Nothing
NTSC < 95% = Forced Film
just "NTSC" = Forced Film

That "otherwise youll have to perform IVTC" I dont know, beacuse Iven never gotten something else than the 6 above.

But you say I should do IVTC with this one. Now my question is, if its at 23.9 fps, theres no need to take out extra frames (there are none), so why should I do IVTC?

[d-clone]

I finished encoding and it came out pretty good, except tha tthe filesize was too big, ut tahts not my problem now. My problem is that I want to encode it again, and this time when GKnot tries to run throught the credits avs file, it ****s up somewhere and skips it, tries to do the main movie and skips it too.

Anyway, I tried to find the source of the problem and found that when I try to open the avs file in VDub, I get the following erro¨r:

VirtualDub Error

visynth open failure:
unrecognized exception!
D:\Temp\movie\credits.avs, line 43)

I deleted GKnot and reinstalled it, it kept giving me that error. Anyone?

[UncasMS]

make sure you have AVISYNTH properly installed