Panic Room

[BluDChyLD]

Damn, this film compresses well! With a bitrate of 411 and retaining the 5.1 ac3 track I was able to compress it into a good 1 cd rip with a res of 608x256 :) Considering this film is nearly two hours long aswell that is really impressive. The first pass log reports the average quantizer as 2.9 which is very good. Bit of a pointless post, just thought it was worth mentioning... Has anyone found a more compressible movie that this?
BluDChyLD

[aryan]

Well, about Panic Room ... actually my final bitrate was 485kBps ... but I'm encoding credits separately at 136kBps, and my final movie size is 714MB@688x288Res. And the 10% compression test reported 92,3% at Soft Bicubic resize and Strong PVE with GMC and Bidirectional encoding at 640x. Thats y I've decided to move to Neutral bicubic resize and Normal PVE, and thus my comression test is 78%. The results are great.
Acording to these methods, I have two movies encoded at smaller bitrate - 446kBps for both - Original Sin and Kiss The Girls. But I didnt like the final results in movie quality, and finaly I've encoded them to 750kBps with MP3 sound.

[bb]

The whole film is dark and doesn't have a lot of colours. So there's no reason to be surprised that it compresses well. At quant 2 (+ using b-frames) I got a video filesize of less than 600 MB - without any filtering, using DivX 5.02.

If you ask me: I'd like to see more films with vivid colours, although these aren't as compressible.

bb

[BluDChyLD]

I agree about having more films with vivid colours, I prefer things to be more vibrant :)

Instead of keep the AC3 track I've re encoded the movie at 100% quality based at 720x304 with b-frames, gmc and pe strong and I have a 524mb video (with re-encoded credits).

As I haven't got a 5.1 setup Im encoding the ac3 to a 256 OGG to take up the extra space and put it on cd.

[JohnMK]

Could you perhaps also try a sharper resizer, like LanczosResize? Also, disable GMC & B-frames to increase the file size. Image quality won't really improve much though. But, it will improve, technically.

By the way, why the urge to live up to some arbitrary file size rule? Why do you need it to be 700MB? Ogg Vorbis 256kbit/s is a huge waste.

[BluDChyLD]

Originally posted by JohnMK
Could you perhaps also try a sharper resizer, like LanczosResize? Also, disable GMC & B-frames to increase the file size. Image quality won't really improve much though. But, it will improve, technically.

By the way, why the urge to live up to some arbitrary file size rule? Why do you need it to be 700MB? Ogg Vorbis 256kbit/s is a huge waste.

I just wanted to take up the whole cd, i'd rather waste audio bitrate than megabytes :) I may reencode it using a lanczos, turn b-frames off and lower the audio quality but I don't think it'll be much differance...

[BluDChyLD]

well Im a little disappointed, DivX can't seem to handle this film very well. The films got all the dark tones textures and colours that it hates, and there's heavy macroblocking in most of the scenes... It's not bad on my monitor but I usually watch films through my tv out which makes it worse. Oh well, can't be helped.

[JohnMK]

Mine had none of those problems.

[BluDChyLD]

did you watch it through tv out? On a monitor there's no problem but it shows up a lot on my television.

[TheXung]

The Others : 708x356 Lanczos resize Average quant 2 ~100 minutes->516 MB.

EDIT: oops, i meant 704

[JohnMK]

708 isn't divisible by 16 :-o

[lovecraft25]

177 * 4 = 708

Have U ever seen the limitations of DivX 5.0.2 ?

"Width must be a multiple of 4"
"Height must be a multiple of 2"

Why people stick to the multiple of 16 since there is no reason...
With AVIsynth you can crop the black lines of your movie and resize it the display size that you want very very accuratly... So why bother with the old "Width must be a multiple of 16"

[BluDChyLD]

I didn't know that about DivX 5, but I think it might cause problems with some of avisynth's filters...

[JohnMK]

The problem isn't in the encoding, it's in the decoding; apparently some video cards/systems can't handle resolutions not mod 16.

[xiri4ever]

Panic Room maxed out at 810MB here. That's with 192Kb MP3.
I had set it to 1390MB but when it was finished it was only 810MB.
The Limit of the Codec was reached.

Other good compressable movies:
From Hell, (I,m Doing it tonight) It's set to 800x336, 384Kb AC3 and the compressibility Test gives 160.4%!!
The Mothman Prophecies, Maxed out @ 1100MB with 320Kb AC3 and 800x336.

[BluDChyLD]

Originally posted by xiri4ever
Panic Room maxed out at 810MB here. That's with 192Kb MP3.
I had set it to 1390MB but when it was finished it was only 810MB.
The Limit of the Codec was reached.

Other good compressable movies:
From Hell, (I,m Doing it tonight) It's set to 800x336, 384Kb AC3 and the compressibility Test gives 160.4%!!
The Mothman Prophecies, Maxed out @ 1100MB with 320Kb AC3 and 800x336.

Whatever you do, don't resize to those values! You are going to be upsizing the original dvd res, which is bad. Stick with 720x--- max.

[TheXung]

Whatever you do, don't resize to those values! You are going to be upsizing the original dvd res, which is bad. Stick with 720x--- max.

If one is truly maxing out the movie (i.e. b-frame ratio 1, quant 2) and sound is extremely good, it doesn't hurt to upscale the movie to take up more space. You can perform a high quality upscale using lanczos instead of the bilinear upscale of dshow. Remember that to get the movie to 720 by whatever for correct ratio, you usually have to shink vertically, you could instead keep all vertical data and expand horizontally.

[OvERaCiD23]

After a 1-pass Q2, I got a 496mb file. Lanczos resize,704x288,no filtering. my god, that's crazy. after watching it, i thought it was only worth 1 disc, but shit, i got the best of both worlds. perfect quality rip, AC3 audio. can't ask for much more (except a better movie, oh well).

[cornetet]

Heres a semi-stupid question from a semi-stupid Newbie...

Does Panic Room compress easier because the majority of the movie is

1) filmed using the same scenes (the interior of the house),

2) under same lighting conditions (most of the movie is at night and the house is dark - most all scenes have the same lighting),

3) there is little to no fast moving action?


Does any of these conditions contribute to better compressibility?

It seems logical to me that a slow-action drama with similar lighting conditions would carry less of a palette of colored-pixels to be converted than lets say 'Star Wars' with high-action, lots of colors and lighting effects.

JUST CURIOUS...:rolleyes:

[BluDChyLD]

Originally posted by cornetet
Heres a semi-stupid question from a semi-stupid Newbie...

Does Panic Room compress easier because the majority of the movie is

1) filmed using the same scenes (the interior of the house),

2) under same lighting conditions (most of the movie is at night and the house is dark - most all scenes have the same lighting),

3) there is little to no fast moving action?


Does any of these conditions contribute to better compressibility?

It seems logical to me that a slow-action drama with similar lighting conditions would carry less of a palette of colored-pixels to be converted than lets say 'Star Wars' with high-action, lots of colors and lighting effects.

JUST CURIOUS...:rolleyes:

Compressibility is determined by how well DivX codec can handle the source. For example, noise (static) on a dvd will make it hard to compress, as will bright vibrant colours such as strong blues and reds (not to sure but I think that's right).

Dark movies compress particularly well, as do slow motion scenes :)

[TheXung]

Now I just noticed Panic Room is a superbit DVD. So why aren't people using higher resolutions?

[aryan]

Originally posted by TheXung
Now I just noticed Panic Room is a superbit DVD. So why aren't people using higher resolutions?

Sure we use it.
I've encoded it with res. 688x288, and with Convolution3D @ sharp bicubic resize and Light PVE compression test was 79,1%. And ofcourse with AC3 sound.
Anyway the result is great :sly:

[TheXung]

Standard DVDs are 720x480, subtract a little for the black slivers on the sides. But what are the resolutions of of a superbit DVD? I always assumed it would be in the 800 range of width

[manono]

Hi-

All NTSC DVDs have the same resolution-720x480-Superbits or not. What makes the Superbits series stand out is the fact that they leave off the extras that many DVDs have and use the extra space to encode at higher average bitrates. Hence the Superbits name.

[VS]

Originally posted by BluDChyLD
Whatever you do, don't resize to those values! You are going to be upsizing the original dvd res, which is bad. Stick with 720x--- max.

that's not true.. you're right about horizantal direction. but if u use use res lower than 1024*xxx (for movies) u allways will downsample in vertical direction.
VS

[Snollygoster]

I was aiming 2CD Rip DivX 5.02 Pro with AC3 sound.

I got 460 MB video file @ max resolution, hence I converted the audio to Ogg 5.1 and I have a perfect good looking 1CD rip. BTW this was my first YUV12 encoding and it looks GREAT!

[ChannelK]

A PAL land question, what actually is superbit?

[jggimi]

Superbit(tm) is the trademark of Columbia TriStar Home Entertainment, Inc.

www.superbitdvd.com