Hd2 Dvd

[Shandra]

Ok, I restrained from asking about Aspect Ratio since PowerDVD uses for a window size for PAL DVDs 768x576 and not 720x.... (I thought I sorted it out for me and VHS captures and for GK I assumed that it knows what it is doing when I set the right PAR...)... and now I bought myself a new DVD wich is HD2 encoded and PowerDVD displays it in 1024x576 ...
(I wanted to check on my other PC with cinemaster but that old Playerproggie wasn't able to handle the DVD Stream correct (badly deinterlaced, lots of jumps/stuttering in playing and often many decoding bugs/artifacts were displayed)

So my question now would be how do I choose a correct resize for that DVD ? Is it possible to set just the size given by PowerDVD as source size (should I then still use 16:9 or 1:1 as second parameter??? ), or how am I to handle that situation???

Edit: Ok, as my sugessted/thought of way would in a blind way need another resize (enlarge) set manually within the avs script... so it would obviously be not an good idea....

Edit2: [&Edit3 -> I think the following passage is a good example of the fact that the abillity to think is the first victim if lack of sleep is combined with semi-knowledge/confusion & the inabillity to focus on one problem) Okok, Problem solved... Was just that this "HD2" was New for me and PowerDVD added up to the confussion...
Now that I have captured the client area of GKnot (resized to 0.0% AR Error (ITU Box checked) with no cropping and Input set to Pal/16:9) - cropped that captured shot to the movie only (witch matched the resize set in GK) - and then downsized the powerdvd capture of the same scene (intro text) and layed that over the first with difference filter for that layer the difference was just a minor outline of the text that could well be the differenze of both resizes (GKnot preview vs. combined resize of PowerDVD&downsize with PSP) - so I think nothing to worry anymore in staying at the usual way using GK ;) Sorry for the inconvinience of this Post.

Thanks,
SHAnDRA

[LigH]

No matter if they used HD2 (High Def Direct) encoding, DVD video is always encoded 720 pixels wide (except for a few exceptions). If you refer to "768 instead of 720", this means that the video was not tagged as "16:9 anamorphic", but as "4:3 non-anamorphic". Therefore, displaying it 768 pixels wide is just normal - due to the slightly squeezed pixels.

In fact, this has historical reasons: PAL television cameras were able to record 576 lines; an area 4/3 as wide as high would have 768 pixels per line, but the cameras could only scan 704 pixels per line - therefore each pixel is not exactly squared, but a bit more wide than high. TV sets compensate that and stretch the video by the same amount.

A width of 720 pixels is not really the same as 4:3 PAL, but even a bit wider; DVD software players may not take this too seriously, but 4:3 TV sets don't display the outmost areas which are called "overscan".

Your new DVD seems to have anamorphic video, here a width of not only 768, but even 1024 lines was squeezed down to 704 pixels (and filled up to 720). Therefore, a player needs to stretch the 16:9 video even more than a 4:3 video. If this wouldn't happen, the result would be "eggs" instead of circles. Such video shall be watches on a wide-screen TV set. For a 4:3 TV set, the video would have to be zoomed out, and black bars (letterboxes) be added above and below.

But anyway, this is still not related to HD2: As far as I could find out, this means that the cinematic film is scanned in a higher resolution, pre-processed in this high resolution, and gets downscaled not before sending it into the encoder (usually, DVD labs get their content already properly sized on DigiBeta in standard PAL / NTSC resolution - but for HD2 encoding, they would get it in high resolution and scale it down while encoding it).

[Soulhunter]

I've also a HD2 DVD (Equilibrium) and there is nothing special with it, except its nice picture quality... ;)


Bye

[Shandra]

Yeah, Equilibrium it was ;) .... (From a old persons view it has captured all ideas from previous cult sources - but well in such a good way....)
Now that I had used GK along with it & and thought it as a base of trial for an encode of 768 (Well, that was just 0.1% AR Error after all and if that topic/problem teached me anything it was that 0.1,0.2, etc. isn't really worth the argumentation) and what I was really buffled with was that using DivX5.1.1 I was compared to the (prev. going for sizes of 6xx x ??y) I was used now 24h+ 3Pass encode - but Equi* in 768*Y made it in less than 14 hours (using my general parameters of size (Diskspace) and pass (1390 MB as result, 1st pass standard, 2nd slow, 3rd slowest....) and that again was/is something that is puzzeling me with that DVD..... (ok, was just a test - as my true backup (yes, I am going to kill the recently made one - was just to test a Width with more than 100% on GK) will be aimed at less than 768 - and after that I maybe am able to say that such an encoded ended up in used to time or that it is this DVD that encoded so pretty well in about halve the used to time ;) ).... But thanks again, your support&reply was needed for/to me to be sure that there is no difference to previous ways of encoding/backub :D

[Soulhunter]

Btw, using search for the word Equilibrium on my HD brings up this...

720x296 Pix. - Image size (Neutral Bicubic)
25fps - Frames per second
102 min. - movie-time


DivX 5.05

2Pass @ 2645 kbps (Slowest)
250 Keyframe-interval
50% Scene-change threshold
Bidirectional Encoding

MP3 Audio @ 224 kBit/s


CD01 = 0700MB
CD02 = 0700MB
CD03 = 0700MB

Bye

[Shandra]

Well... that sorted it out as an final answer ;)
(And yes, I verified - its a pretty good source for fast encoding - and maybe my 24h was out of order as I am by now am used to VHS captures and 4:3 DVD of old movie source :p)
But even if this thread isn't worth of it to get any further into details.... I am still puzzled about that HD2 and PowerDVDs behaviour in regards to it (ok, PDVD 4) .... what is the factor in the DVD stream wich makes PDVD think to size on 1024 instead of 768 ?????
(And yes, I now verified on a proper resize (vertical only, not maintaning DAR of Source Picture) - and again the not to be noticeable loss - so PDVD not only stretched on vertical axis, but on horizontal as well - so that itmatched a used to 768x576 full pal image.... but yes - my problem is solved - now I am really really curious about PDVDs behaviour ;) :p But that may nedd a switch in Forum....I searched for HD2 and DVD and encoding and the DVDs (as I tried to mention in my prev. Post) & I got nothing apart from DVD reviews wich used such way of encoding - but no specs, nothing.......