DVD encoded(divX6) or shrink(35/40%)

[omadawn]

Hi
anyone tryed to encode a long DVD (dixX 5/6) to a size of a blank one (4463mb) and compare the quality of the image of the same DVD compressed 35/40% in DVDshrink (lets say 7/8 Mbps became 4/5 Mbps) ?

does it make any sense?

thanks

[CWR03]

The comparison would be useless as a benchmark since all movies will compress differently, quality of a DivX file will vary given the selected resolution, and the quality itself will vary dependent on the perception of the viewer. I do believe as a rule that it's easier to get 4 hours of quality video in XviD onto a disk than to keep in DVD-video format.

[omadawn]

The comparison would be useless as a benchmark since all movies will compress differently, quality of a DivX file will vary given the selected resolution, and the quality itself will vary dependent on the perception of the viewer. I do believe as a rule that it's easier to get 4 hours of quality video in XviD onto a disk than to keep in DVD-video format.

I kindly disagree with you on the "easier" aspect, for me it's easyer to put the 4 hours movie in a blank DVD than to create a divX file with subs and more....like you said, i guess this is an individual perception issue.

any way, not a 4 but a 3 hour movie can usually be placed in a divX file (with at least 704*400) considering the 4463 Mb of space...

In such case what's your opinion?

[shon3i]

does it make any sense?Have a big sense. DivX will produce much better quality IMHO, but i aslo recommend you to keep and encode in full anamorphic resolution, and after only in contaner signalize with correct aspect ratio like is original DVD.

[omadawn]

Have a big sense. DivX will produce much better quality IMHO, but i aslo recommend you to keep and encode in full anamorphic resolution, and after only in contaner signalize with correct aspect ratio like is original DVD.

But that way i won't get rid of the annoying black bars (one of the big advantages of divX encoding)...

[omadawn]

Have a big sense. DivX will produce much better quality IMHO, but i aslo recommend you to keep and encode in full anamorphic resolution, and after only in contaner signalize with correct aspect ratio like is original DVD.

Am i mistaken on my judgement somehow?...i will have my final avi with the black bars on a 16:9 screen from the moment i set the original aspect ratio on the container.

In terms of quality,whitch are the aspects that i must be prepared to loose?

[shon3i]

In terms of quality,whitch are the aspects that i must be prepared to loose?I am not understand this phrase?

Did you get this DivX looks bad or it is good?

[omadawn]

I am not understand this phrase?

Did you get this DivX looks bad or it is good?

sorry, i mean: if i don't use the original aspect ratio, what will i loose in terms of quality?

[shon3i]

sorry, i mean: if i don't use the original aspect ratio, what will i loose in terms of quality?
Nothing, only picture will be stretched

[omadawn]

just finished encoding, this time used autogknot (divx6.4) with the max. file size of 4463 Mb. My final avi came out with 0 kb...

I'll try again with Xvid now, here's the log for any ideas that might help...

[omadawn]

New try, this time with Gknot (divX 5): output file size: 4463 Mb, after compression test the bits/pixel/frame lead me to choose the res. of 1280x720. the avi came out perfectly ok.

As i use a video projector to display a huge screen, i guess i will allways have advantage in using this resolution?...

[omadawn]

I have seen the movie (from my VGA output of the PC) in a much larger screen than i usualy do with a 720x400 one, and the quality seem to be very similar...the only problem is my standalone not be able to display the higher resolution. What do u guys think of this?

[omadawn]

DivX at resol. of 1280x720 (playable trough Laptop's VGA output) compared with 720x576 DVD backup played trough a good standalone...opinions?

[DewAsmara]

DivX at resol. of 1280x720 (playable trough Laptop's VGA output) compared with 720x576 DVD backup played trough a good standalone...opinions?

Hahaha,
Yeah I did it. You know what, some how DivX 1280x720 seems more clear and sharp. But it depends from the source it self, if you using High Quality DVD (8000 bitrate), convert it to DivX 720p and also back up it as DVD into PAL resolution, then DivX will take advantage. But if the original source quite terrible (ie copy pirating DVD or low bitrate source/compress) then better stay in DVD format.

But I never shrink any DVD, it is useless, you get rip it as VOB file using Xilisoft and optimized it by make lowest bitrate at zero and average bitrate at 8000, you will see the result much better than have to be compress. Picture quality still sharp, but size reduce a lot.

[omadawn]

High Quality DVD (8000 bitrate)

you mean 8000 maximum bit rate right?

[DewAsmara]

you mean 8000 maximum bit rate right?

Ehm not really,
Some superbit movie like Desperado have average bitrate 8.2k so 8000 is not the maximum number. As I remember maximum for DVD is 10800 bitrate (Video+Sound) and video can be reach at 9000 bitrate. I was rip last time Chinese movie from the original DVD at variable bit rate, some scene can reach at 11k some as low as 1500 bitrate. But I set average at 9000 and maximum at 10800.

To be honest, for backup better stay at DivX (standard definition) but set at full bitrate in 4000 and sound at 320. It is very nice though and DVD Disc can use Single Layer (4.7GB) because file will be arround just 3.5GB.

[omadawn]

OK. but when you actually zoom++ the image on a 1024*768 HT projector, the extra pixels of the resolution of a good quality movie can somehow compensate the loss by zooming?

[DewAsmara]

the extra pixels of the resolution of a good quality movie can somehow compensate the loss by zooming?

Good question,
DivX do this trick on their 6.2xxx converter, by increase bitrate to 6000 bitrate for 1280x704 resolution (HiDef certified). But even if I convert 8000 bitrate DVD into HD DivX at 1280x704 and setup bitrate with 6000 bitrate, the result still arround 4332 bitrate for average. So perhaps there is some algoritma in DivX coding that optimize movie to avoid loss quality in zooming at high pixel. But back into my statement why suggest backup with DivX at standard definition with 4000 bitrate, it is because for optimize storage space, and for zooming you can use hardware upscaling either it is inside your computer, DVD/DivX player or external upscaler. As DivX have more optimize code than DVD, to watch movie at their best you have to use DVD at 8000 bitrate, but for DivX at 4332 bitrate its already 720p quality.

[omadawn]

i am going to rip a 8000kbit source now, in avi 720x400 and also 1280x720 and then make my test...

[DewAsmara]

I was success rip Superman Returns from its original DVD using DivX Converter 6.2 last Saturday. Set pixel at 720x400 and bit rate set at 4000 and sound at 320kbps mp3. But surprising me that result show bit rate at only about 3200-3300 bit rate only (for sound remain at 320), good news is file size only 3.48GB compare than original VOB files that arround 7GB. Burn that file into DVDR and see the result using my Micro Home Theater, was shock, the contrast color seems more better than DVD, but there is some detail that little bit below DVD but almost cannot see except using well trained eyes. Well I understand as I set this converter at DivX Home Theater Certified, not sure if boost at DivX HiDef certified and bitrate increase to 6000 bit rate. Perhaps for computer can but my home theater will suffer :p

[omadawn]

Got me again that annoying error on divX6 (code 100 - invalid source format)...:mad:

if i use Xvid it encodes with no problem!!:confused:

[DewAsmara]

Got me again that annoying error on divX6 (code 100 - invalid source format)...:mad:

if i use Xvid it encodes with no problem!!:confused:

Did you:
1. Activated and use Arccos+Macrovision removal software
2. Use Region Free+Copy Protecting Free software

Another ripper software like Xilisoft can rip some protected DVD/movie. But DivX Converter I think not. And also, if using DivX Converter just mark VOB files start from ***1 until the end of the group.
Example:
VTS01_00.VOB => No need
VTS01_01.VOB (Marked) => film
VTS01_02.VOB (Marked) => film
VTS02_01.VOB => Another movie clip

Try again.

[omadawn]

THE first one came out: Xvid 1280x720, 5750 kbit/s, 3.77 GB, now will make the same rip at 720x400...